Acetic acid (vinegar)
The acid in vinegar. Genuinely effective on limescale and mineral films, and routinely recommended for surfaces it should never touch.
What not to do
Never mix
Chlorine gas is released. It is an immediately dangerous respiratory irritant with a sharp distinctive smell. Even low levels for short periods irritate the eyes, nose and throat and cause coughing and breathing problems; higher levels cause chest pain, severe breathing difficulty, vomiting and lung damage, and very high levels can be fatal. Leave the area for fresh air at once and seek medical advice. FEELING BETTER SHORTLY AFTERWARDS IS NOT AN ALL-CLEAR: the regulator recommends medical observation for 24 to 48 hours, because fluid on the lungs can be delayed.
Never mix
Peracetic acid is formed, which irritates the eyes, skin and lungs. This is a materially less severe outcome than the chlorine and chloramine hazards on this page, and it is recorded because the combination is widely recommended online as a produce wash and a surface treatment, usually with the reassurance that neither ingredient is anything to worry about.
Acetic acid (vinegar) is unsafe on Polished marble
Unsafe
Do not do this. The risk is established, and it is described below.
Etching is chemical removal of the stone, not a stain. It cannot be cleaned off and the surface has to be re-polished.
Precautions
- Test on an inconspicuous area first
Why we say this
Strongly supported
The stone trade states the prohibition directly and the chemistry is uncontested. Re-pointed in Sprint 2 from the association's unread design manual to its consumer guidance, which was read.
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That products containing lemon, vinegar or other acids may dull or etch calcareous stones, and that calcareous stone is sensitive to acidic solutions. (states this directly)
Verification: a person has read the passage relied on.
Read on — Sprint 29 read all nine sections. Earlier sprints had read three: the siliceous-versus-calcareous classification, cleaning products, and sealing. Supports a wider statement — our claim was widened. Three sections of nine had been read and the source treated as complete. The unread six carry the whole preventive programme - coasters, trivets, non-treated dry mopping, slip-resistant mats, worn vacuum wheels, blot-don't-wipe - none of which the register held. They also answer a priority-1 row reading 'no route answers this yet': the authority's position on etch marks is that they are not a cleaning problem and need professional re-polishing. Two oddities are worth the record: dry 0000 steel wool is permitted on water rings, and efflorescence is removed dry because water makes it worse.
Kirk-Othmer Encyclopedia of Chemical Technology
John Wiley & Sons · Reference work
Relied on for: That acids react with calcium carbonate to form soluble salts. (background and mechanism only)
Verification: the work exists and is described correctly. Nobody has yet read the specific passage.
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Acetic acid (vinegar) is unsafe on Limestone
Unsafe
Do not do this. The risk is established, and it is described below.
Precautions
- Test on an inconspicuous area first
Why we say this
Strongly supported
Limestone is named by the trade as calcareous, so the prohibition applies directly rather than by analogy with marble.
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That calcareous stone is sensitive to acidic solutions and that lemon, vinegar and other acids may dull or etch it. (states this directly)
Verification: a person has read the passage relied on.
Read on — Sprint 29 read all nine sections. Earlier sprints had read three: the siliceous-versus-calcareous classification, cleaning products, and sealing. Supports a wider statement — our claim was widened. Three sections of nine had been read and the source treated as complete. The unread six carry the whole preventive programme - coasters, trivets, non-treated dry mopping, slip-resistant mats, worn vacuum wheels, blot-don't-wipe - none of which the register held. They also answer a priority-1 row reading 'no route answers this yet': the authority's position on etch marks is that they are not a cleaning problem and need professional re-polishing. Two oddities are worth the record: dry 0000 steel wool is permitted on water rings, and efflorescence is removed dry because water makes it worse.
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Acetic acid (vinegar) is unsafe on Grout
Unsafe
Do not do this. The risk is established, and it is described below.
Cement is alkaline and is dissolved by acids. The damage is gradual and reads as wear, which is why it is rarely blamed on the cleaner that caused it.
Precautions
- Test on an inconspicuous area first
Why we say this
Supported
Stated directly by the tile trade association, which gives both the chemistry and the conclusion. Held at supported rather than strongly supported because it is one trade body and no measurement of the rate of attack was found.
Sources
Tile Council of North America (TCNA) · Trade or professional body
Relied on for: That cement is alkaline based and is dissolved by acids, and that manufacturers do not advocate acid-based cleaners because they attack the cement in the grout. (states this directly)
Verification: a person has read the passage relied on.
Read on — The whole FAQ entry: grout porosity, cleaner selection, sealing, and epoxy grout. Supports a narrower statement — our claim was reduced. Enough to create the grout material record, which several high-demand mould and limescale intents referenced without it existing. NOT enough for the whole grout question: TCNA is silent on bleach, on abrasion and on mould, which are precisely what readers ask about. Those remain unanswered on the record rather than being filled in from general chemistry, and the grout intents stay partial.
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Acetic acid (vinegar) is unsafe on Mirrored glass
Unsafe
Do not do this. The risk is established, and it is described below.
The single most common domestic glass remedy, named by the trade body as one not to use.
Precautions
- Test on an inconspicuous area first
- Limit the contact time
Why we say this
Strongly supported
Named explicitly by the industry body responsible for the product.
Sources
Glass Technical Paper FB06-05: Proper Procedures for Cleaning Flat Glass Mirrors
National Glass Association (NGA), Mirror Division, 2019 · Trade or professional body
Relied on for: That commercial mirror cleaners containing ammonia or vinegar must not be used, and that acid or alkali cleaners can attack the front surface, the edges and the backing. (states this directly)
Verification: a person has read the passage relied on.
Read on — 'Care and Cleaning of Mirrors', the numbered recommendations 1 to 8. Supports the claim as stated.
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Acetic acid (vinegar) is unsafe on Coated aluminium
Unsafe
Do not do this. The risk is established, and it is described below.
Vinegar included. The prohibition is on acid cleaners as a class rather than on any particular acid.
Why we say this
Supported
Same prohibition, recorded against the household acid readers actually have. Note the source names strong mineral acids as its examples; CleaningHQ does not claim it tested vinegar.
Sources
AAMA 609 & 610-02: Cleaning and Maintenance Guide for Architecturally Finished Aluminum
American Architectural Manufacturers Association (AAMA), 2002 · Standards body
Relied on for: That aggressive alkaline or acid cleaners must never be used on aluminium finishes, and that marks resulting from mistreatment may be permanent. (states this directly)
Verification: a person has read the passage relied on.
Read on — Read in full. Sections 3 General, 4.1 light surface soil, 4.3 organic coatings, and 5 Cleaning Precautions. Supports the claim as stated.
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Acetic acid (vinegar) may damage Glass
Best avoided
The available guidance advises against this.
The glass paper excludes acids from glass cleaning solutions as a class, naming hydrochloric and hydrofluoric as its examples. Recorded as may damage at avoid rather than unsafe on because vinegar is not among the acids it names.
Why we say this
Supported
A trade association excluding a class from its cleaning solutions. The honest reading is a negative recommendation covering household acids, not an established harm finding for vinegar specifically.
Sources
Glass Technical Paper FB01-00: Proper Procedures for Cleaning Architectural Glass Products
National Glass Association (NGA) with the International Window Cleaning Association (IWCA), 2023 · Trade or professional body
Relied on for: That glass cleaning solutions should not include acids, especially muriatic or hydrochloric and hydrofluoric, and that glass can be permanently damaged if improperly cleaned. (states this directly)
Verification: a person has read the passage relied on.
Read on — 'Routine Cleaning & Maintenance', including the pure-water method paragraph. Supports the claim as stated.
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Acetic acid (vinegar) may damage Plated and coated tap finishes
Best avoided
The available guidance advises against this.
Written in Sprint 22 to close a standing validation warning: the treatment-conflict record has claimed since Sprint 9 that acids endanger plated tap finishes, and no safety edge recorded it.
Why we say this
Supported
The manufacturer prohibits acid on PVD finishes specifically. Recorded as may damage across plated finishes generally because a reader cannot tell which plating their tap carries, and the same document permits a fifty-fifty vinegar solution on powder-coated finishes — so this is finish-dependent rather than universal.
Sources
KALLISTA (Kohler Co.) · Manufacturer documentation
Relied on for: That PVD finishes must not meet cleaners containing ammonia, bleach or acid, and that abrasive cleaners and solvents must not be used on any finish. (states this directly)
Verification: a person has read the passage relied on.
Read on — The sections on nickel silver and chrome; brushed nickel, gunmetal and matte black; PVD finishes; acrylic, cast mineral and cast stone; acrylic baths with airjets; and cast-iron baths. Supports the claim as stated.
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Precautions
- Never mix with other cleaning products
- Rinse thoroughly afterwards
- Test on an inconspicuous area first
In detail
Household vinegar is a dilute solution of acetic acid, typically a few per cent, with the exact strength varying by product. As an acid it dissolves limescale and mineral deposits by the same carbonate reaction as any other acid, and it is cheap, available and low in acute hazard, which explains its popularity. Its reputation has outrun its chemistry. Vinegar is a weak acid and a poor degreaser, because cutting grease is a job for surfactants or alkalis rather than acids, and it is a poor disinfectant compared with products formulated for the purpose. More importantly, the surfaces it damages are exactly the ones it is most often recommended for online: carbonate stone, which it etches; grout and stone sealants, which it degrades; and rubber seals and some appliance components, which are attacked by prolonged acid contact. It is a useful descaler that has been promoted into a universal cleaner it was never capable of being.
Properties
- Chemical name
- Ethanoic acid
- pH
- Acidic
What works
Acetic acid (vinegar) is effective against Limescale Strongly supported
Acetic acid (vinegar) is effective against Limescale Strongly supported
Sprint 8 adds a manufacturer printing this procedure in its own manual, which is stronger than the background chemistry alone.
Acetic acid (vinegar) is effective against Blood Supported
Named by the wool body for blood on wool: undiluted white vinegar, dabbed, followed by cold water.
Acetic acid (vinegar) is safe on, in specific conditions, Stainless steel
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, CleaningHQ makes no claim.
Only within these limits:
- For removing adherent hard-water scale, as a defined operation with an end
- Never combined with salt, and never left as a residue
- Rinse thoroughly with clean water and dry afterwards
- Never applied where bleach or a hypochlorite product is present
The same trade body that lists a dilute vinegar soak for scale warns that salt and vinegar mixtures cause pitting over time. The variable is chloride and dwell time, not the vinegar — see the conflict record.
Precautions
- Rinse thoroughly afterwards
- Never mix with other cleaning products
- Limit the contact time
Why we say this
Supported
A clearance and its own limit, taken from the same body. Recorded deliberately as a demonstration that conditionally safe means something: outside these limits the record says nothing at all, and the second citation is what draws the boundary.
Sources
Care and Maintenance of Stainless Steel
British Stainless Steel Association, Stainless Steel Advisory Service, 2001 · Trade or professional body
Relied on for: That soaking in a 25 per cent vinegar solution and working the deposit with a nylon brush is a stated treatment for adherent hard water scale on stainless steel, followed by rinsing and drying. (states this directly)
Verification: a person has read the passage relied on.
Read on — Sprint 29 re-read all four pages: Factors Affecting Maintenance, Maintenance Programme, Cleaning Methods with the whole of Table 1, Table 2, and Notes 1-10. Earlier sprints named both tables but carried only part of one and none of the notes. Supports a wider statement — our claim was widened. SPRINT 29 FOUND THIS UNDER-EXTRACTED WHILE ALL THREE SIGNALS CALLED IT DONE: zero representation debt, in the fully-harvested list, and honestly noted as 'read in full'. Five of Table 1's eleven rows, all of Table 2 and eight of ten notes had never reached the graph. Newly built: tannin and coffee deposits, heat discolouration, the 1% ammonia routine clearance, oxalic acid for embedded iron, and the condition-triggered domestic frequency rule. The paraphrase cap is part of the cause, and the fix is not a longer paraphrase — the facts belong in the citing records.
Cleaning methods for stainless steel
British Stainless Steel Association · Trade or professional body
Relied on for: That concentrated salt and vinegar mixtures may cause pitting over a period of time, which bounds the clearance. (states this directly)
Verification: a person has read the passage relied on.
Read on — The whole article, compared clause by clause against SSAS Information Sheet 7.20. Supports a wider statement — our claim was widened. Recorded as a dependent source, so it cannot carry a claim alone. Its overnight-bleach-soak instruction and its salt-and-vinegar caution are the specific, domestic-scale statements CleaningHQ needed and are cited alongside the information sheet rather than instead of it.
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Acetic acid (vinegar) is safe on, in specific conditions, Plated and coated tap finishes
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, CleaningHQ makes no claim.
Conditional, not flat: the same manufacturer prohibits acid on PVD finishes and permits a fifty-fifty water and vinegar solution on matte black and other powder coats. The finish decides.
Only within these limits:
- Only where the finish is confirmed to be matte black or another powder coat, for which the manufacturer permits a fifty-fifty water and vinegar solution
- Never on a PVD finish, which the same guidance says must not meet cleaners containing acid
- Not on a finish you cannot identify — the two look similar and the answers are opposite
The condition here is knowledge rather than dilution or contact time: the same manufacturer permits vinegar on one finish and prohibits acid on another, and almost no owner knows which they have.
Precautions
- Check the manufacturer's instructions
- Test on an inconspicuous area first
- Rinse thoroughly afterwards
Why we say this
Strongly supported
The manufacturer states both halves. Recording this as flatly unsafe would contradict the same document, and recording it as safe would ignore the PVD prohibition — which is exactly why the state is conditional and the condition is knowing the finish.
Sources
KALLISTA (Kohler Co.) · Manufacturer documentation
Relied on for: That PVD finishes must not meet cleaners containing ammonia, bleach or acid, and that matte black and other powder coats may be cleaned with mild dish soap or a fifty-fifty water and vinegar solution. (states this directly)
Verification: a person has read the passage relied on.
Read on — The sections on nickel silver and chrome; brushed nickel, gunmetal and matte black; PVD finishes; acrylic, cast mineral and cast stone; acrylic baths with airjets; and cast-iron baths. Supports the claim as stated.
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Acetic acid (vinegar) is safe on, in specific conditions, Vitreous enamel
Safe only in specific conditions
This is only appropriate within specific limits. Outside those limits, CleaningHQ makes no claim.
Sprint 27. Acid-resistant, not acid-proof — and the hot-surface case takes a different action.
Only within these limits:
- Not permitted to remain on the finish — acid-resistant is not acid-proof
- On a HOT surface, wiped up dry at once rather than washed
- Washed with soap and water, and rinsed, only once the surface has cooled
The manufacturer states the finish is acid-resistant and in the same paragraph tells the reader not to let acidic food sit on it. Residence time is the whole of the limit, and temperature decides which action applies.
Precautions
- Do not apply to a hot surface
- Rinse thoroughly afterwards
Why we say this
Supported
A manufacturer stating a limit on its own finish. The temperature condition is the reusable part: on a hot enamel surface the instruction is a dry wipe followed by waiting, not a wash, and no other record in this catalogue carries that shape.
Sources
Use and Care & Installation Guide: Self-Cleaning Electric Range
GE Appliances · Manufacturer documentation
Relied on for: That the porcelain enamel finish is acid-resistant but acidic foods such as fruit juice, tomato or vinegar should not be permitted to remain on it, and that acid spilled on a hot surface is wiped up dry at once and washed only after the surface has cooled. (states this directly)
Verification: a person has read the passage relied on.
Read on — Sprint 27 read Care and Cleaning (26-29) and Operating the Self-Cleaning Oven (22-25) with both Q&A panels. Sprint 28 added Important Safety Instructions (2-5) and the Problem Solver (33-34), which is where the carbon-monoxide statement is. Supports a wider statement — our claim was widened. The queue scored this source at zero debt because twenty-one records cite it. That was true and it was not the same thing as the passage being exhausted: the locator recorded that two sections had been read, and the rest of the chapter turned out to hold the oven shelves, the door glass, the enamel scope and two fire statements. ZERO DEBT MEANS WELL CITED, NOT FULLY READ, and the two are easy to confuse. The harvest is a component record for the shelf and one for the door glass, the enamel acid and crazing scope, the painted and metal exterior prohibitions, and the two fire facts.
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Where the answer depends
Acetic acid (vinegar) may damage Granite
Depends on the manufacturer
This depends on the specific product or finish. Check the manufacturer's own instructions before proceeding.
The stone generally resists kitchen acids; the impregnating treatment on top of it does not, and commercial 'granite' is not a mineralogical term.
Precautions
- Check the manufacturer's instructions
- Test on an inconspicuous area first
Why we say this
Supported
Recorded as manufacturer-dependent rather than unsafe because the trade guidance genuinely holds both positions, for reasons of scope recorded in the conflict register. The answer depends on the specific stone and its treatment, which only the fabricator knows.
Sources
Care & Cleaning of Natural Stone
Natural Stone Institute · Trade or professional body
Relied on for: That siliceous stone generally resists most acids found in kitchen settings but that acidic cleaners are still not recommended, and that sealing products act as repellents rather than sealers. (states this directly)
Verification: a person has read the passage relied on.
Read on — Sprint 29 read all nine sections. Earlier sprints had read three: the siliceous-versus-calcareous classification, cleaning products, and sealing. Supports a wider statement — our claim was widened. Three sections of nine had been read and the source treated as complete. The unread six carry the whole preventive programme - coasters, trivets, non-treated dry mopping, slip-resistant mats, worn vacuum wheels, blot-don't-wipe - none of which the register held. They also answer a priority-1 row reading 'no route answers this yet': the authority's position on etch marks is that they are not a cleaning problem and need professional re-polishing. Two oddities are worth the record: dry 0000 steel wool is permitted on water rings, and efflorescence is removed dry because water makes it worse.
Last reviewed by a person on .
Why
- Acetic acid (vinegar) is explained by pH in cleaning
- Acetic acid (vinegar) is explained by Material compatibility
The single clearest case in the catalogue: one agent, one mechanism, opposite answers on a kettle and a worktop.
Hacks and claims involving this
- Natural cleaning products are safer Does not work
- Mixing vinegar and bicarbonate of soda Does not work
- Spraying hydrogen peroxide and vinegar in sequence Does not work
- Vinegar as an all-purpose cleaner Disputed
- Granite is acid-proof, so vinegar is fine on it Disputed
- Using a limescale remover on shower grout Does not work
- Bicarbonate of soda and vinegar down a drain Unresolved
When the obvious answer is wrong
How do I remove limescale from a marble shower without ruining the marble?
Marble is also calcium carbonate. The acid cannot distinguish between carbonate deposited by hard water and carbonate that is the stone itself, so it dissolves both. The result on the stone is etching: a dull, slightly rough patch where the polished surface has been chemically removed. It is not a stain and there is nothing left on the surface to clean off.
A different kind of treatment works: Take the mechanical route rather than the chemical one. The stone trade's stated treatment for surface accumulation of hard water — what it calls water spots and rings — is to buff with dry 0000 steel wool, which is fine enough to lift the mineral film without cutting the stone, and involves no acid at all. Work on the deposit only, keep it dry, and stop as soon as the film has gone. Prevention does more than any treatment here: a squeegee after each use removes the water before it can evaporate and leave its minerals behind, which is the moment the deposit is actually created. If the surface is already dull in patches rather than filmed, that is etching rather than scale, no cleaning method will touch it, and re-polishing is a job for a stone restorer.
Can I use a limescale remover on the grout in my shower?
Cementitious grout is alkaline based and is dissolved by acids — the tile trade states this plainly and draws the conclusion itself, that manufacturers do not advocate acids because they attack the cement in the grout. Grout is also porous, so an acidic product does not merely touch the surface. The damage is gradual and looks like wear rather than like chemical attack, which is why it is rarely attributed to the cleaner that caused it.
A different kind of treatment works: Use an alkaline cleaner rather than an acidic one. This is the tile trade's stated preference for grout, and it has the convenient property of matching what the other common soil in a shower actually needs — soap scum and body oils are greasy soils that respond to alkali and surfactancy, not to acid. Where the grout is epoxy rather than cementitious the constraint does not apply in the same way, since epoxy grout is described as virtually as stain-proof as the tile, but check which you have before assuming. As with stone, drying the surface after use does more than any product: the deposit forms when hard water evaporates in place.
How do I get hard water spots off a bathroom mirror without wrecking it?
A mirror is not a pane of glass. It is glass with a reflective coating and a protective backing, and both are exposed at every edge. The glass industry's mirror division states that acid or alkali cleaners can attack the front surface, the edges and the backing, and names cleaners containing ammonia or vinegar specifically as ones not to use. The failure is called black edge, it starts where liquid runs into the perimeter, and it is degradation of the mirror rather than dirt on it.
A different kind of treatment works: Change the mechanism from dissolving to drying. The mirror division's own recommendation is clean warm water on a soft lint-free cloth, wrung out, with the mirror dried immediately afterwards — which works because the deposit is created at the moment of evaporation rather than while the water sits. Apply any liquid to the cloth and never spray it at the mirror, so nothing can run down into the edges, and finish by checking that the joints and edges are dry. Where a mark will not come off with water, the paper's stated method is 0000 oil-free steel wool, explicitly not a solvent, since solvents attack the edges and backing too. The prevention is the whole answer in a bathroom: ventilate, and wipe the mirror dry rather than letting the condensation evaporate on it.
Can I use a limescale remover on my bathroom taps?
The visible part of a modern tap is a plated, physical-vapour-deposited or powder-coated finish a few microns thick, not solid metal. The manufacturer's care sheet states that PVD finishes must not meet cleaners containing ammonia, bleach or acid, which excludes most limescale removers and a good share of bathroom sprays. Because the finish is microns thick there is no margin: material lost is coating lost, the dulling is progressive, and it cannot be polished back because there is nothing underneath to polish.
A different kind of treatment works: Prevent the deposit instead of dissolving it. The same care sheet gives the mechanism and the method in one line: allowing water to evaporate on metal will form water deposits, so blot the fitting dry with a dabbing action rather than rubbing, after use. That removes the water before it can leave anything behind, which is the only point at which the deposit is actually created. For routine cleaning, rinse away soap traces and dry with a soft cloth. Establish which finish you have before using anything else — the exception is instructive, since matte black and other powder coats are the one family the manufacturer permits a fifty-fifty water and vinegar solution on, so the finish that looks most fragile is the one that tolerates the household remedy.
How do I get limescale off a shower screen without damaging the glass?
The glass association's cleaning paper excludes acids from glass cleaning solutions as a class, naming hydrochloric and hydrofluoric as its examples, and warns that glass can be permanently damaged if it is infrequently or improperly cleaned. It also rules out the two things people escalate to when the acid does not work: abrasive cleaning materials, and razor blades or metal scrapers, which are excluded from routine cleaning altogether. The mechanism it gives for scratching is not the cleaner but trapped grit, so scrubbing a gritty screen is worse than leaving it.
It cannot be removed safely — prevent it instead: Treat this as a drying problem rather than a cleaning one, because that is where the deposit is actually created. The glass paper is precise about the mechanism from the other direction: its pure-water method requires water below 20 ppm total dissolved solids and states that tap water is not acceptable, because the rinse water is allowed to evaporate in place. Ordinary tap water left to evaporate on a screen deposits exactly what it was carrying. So the intervention with evidence behind it is removing the water before it dries — squeegee or blot the screen after each use, which is the same instruction the sanitaryware manufacturer gives for metal, where allowing water to evaporate forms deposits and the technique is to blot with a dabbing action rather than rub. For scale already established, CleaningHQ has no method it can support on this substrate: the acid that would dissolve it is excluded by the glass authority, and abrasives and blades are excluded too.
Where the sources disagree
If granite resists kitchen acids, why is vinegar still advised against on it?
The first statement is about a mineral and the second is about a worktop, and a worktop is not only its mineral. Three things sit between them. Nearly every installed granite surface carries an impregnating treatment, which the same guidance is careful to describe as a repellent rather than a sealer, and which has its own chemistry that acids degrade regardless of what the stone beneath tolerates. Stone sold commercially as granite is not a mineralogical designation and covers rocks that contain carbonate minerals and behave like marble. And the polished finish is a surface condition rather than a property of the bulk material. A statement about acid resistance is therefore true of the rock and insufficient for the object.
What to do: Treat the answer for granite as unknown unless you know what the specific stone is and what is on it. The recommended cleaner for both stone classes is the same — a neutral cleaner, stone soap or mild washing-up liquid in warm water — so nothing is lost by using it, and the acid question does not need to be resolved to clean the surface.
The sources are answering different questions
Stainless steel guidance offers a vinegar soak for scale and warns that vinegar causes pitting. Which is it?
The variable that differs between the two statements is not the vinegar — it is the chloride and the time. Pitting corrosion of stainless steel is initiated by chloride ions breaking down the passive layer at localised points, and acid accelerates it; the warning is about SALT AND vinegar together, left in place. The descaling instruction involves neither salt nor indefinite contact, and is followed in the same table by rinsing and drying. Read as two statements about vinegar they contradict; read as two statements about chloride residue they are the same statement seen twice.
What to do: An acid descaling treatment on stainless steel is a defined operation with an end: apply, work the deposit, rinse thoroughly with clean water, dry. What causes damage is residue left sitting — particularly anything salty — not the descaling itself. Never combine an acidic descaler with bleach or any other product, and rinse between products rather than following one with another.
The sources are answering different questions · safety-critical
Sources for this page
Sources
Dimension Stone Design Manual
Natural Stone Institute · Trade or professional body
Relied on for: That acidic cleaners are advised against on calcareous stone.
Verification: the work exists and is described correctly. Nobody has yet read the specific passage.
What CleaningHQ cannot answer yet
These are recorded questions about this subject that we have not yet researched to a standard we would publish.
- Compare acids for limescale removal
- Compatibility of acetic acid with a wood floor finish
- Whether vinegar is a disinfectant or only a cleaner
- What natural means on a cleaning product
- Whether steaming vinegar and water loosens microwave soil
- Whether the combined reaction has cleaning value
- Whether diluted acetic acid removes or kills algal growth on paving
- Whether diluted acetic acid removes cooked-on grease from an air fryer
- Compatibility of acetic acid with a microwave cavity
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