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Potassium hydroxide

CAS 1310-58-3

Also registered as 3 other CAS numbers

29857-72-5 · 71769-53-4 · 2226392-06-7

Potassium hydroxide chemical structure

Concern score

Not assessed — no hazard data yet.

Potassium hydroxide in plain language

What it is

Also known as Caustic potash · Arrocon 2298 · Caswell No. 693 · Cyantek CC 723 · E-525 · Hydroxyde de potassium

Show all 29 names

Ins NO.525 · INS-525 · K(oh) · Koh · Kaliumhydroxid · Potassium hydrate · Potash lye · Potassa · Potasse caustique · Potassio (idrossido di) · Potassium (hydroxyde de) · Potassium Hydroxide (dry solid, flake, bead or granular) · Potassium hydroxide (K(OH)) · hidroxido de potasio · potassium hydroxide (sara iii) · potassium hydroxide (45%) (sara iii) · potassium hydroxide (cercla) · potassium hydroxide (cercla) %: 0.10-0.99 · potassium hydroxide (cercla). %:0.1-0.99. · Kali causticum · Potassium hydroxide solution · electrolyte solution (30% potassium hydroxide) (cercla) · potassium hydroxide (cercla)/30% koh solution

What it does

Used in consumer products as a chelating agent and a pH adjuster.

  • Chelating agent
  • pH adjuster
Is it a concern?
We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Potassium hydroxide appears in these published regulatory listings.

  • Inactive ingredient in US drugs
  • In marketed US drugs

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Industrial
  • USFDAinactive ingredient database13 entries — 5 administration routes
    • Route: INTRAVENOUS; Dosage form: INJECTION; Potency: ADJ PHSource →
    • Route: ORAL; Dosage form: CAPSULE; Maximum daily exposure: 172 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, DELAYED RELEASE; Maximum daily exposure: 5 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, EXTENDED RELEASE; Potency: 0.07 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, LIQUID FILLED; Maximum daily exposure: 154 mgSource →
    • Route: ORAL; Dosage form: PASTILLE; Potency: ADJ PHSource →
    • Route: ORAL; Dosage form: SOLUTION; Potency: ADJ PHSource →
    • Route: TOPICAL; Dosage form: AEROSOL, FOAM; Potency: ADJ PHSource →
    • Route: TOPICAL; Dosage form: CREAM; Potency: 0.5 %w/wSource →
    • Route: TOPICAL; Dosage form: GEL; Maximum daily exposure: 3 mgSource →
    • Route: TOPICAL; Dosage form: SOLUTION; Potency: 14.02 %w/wSource →
    • Route: VAGINAL; Dosage form: CREAM; Maximum daily exposure: 3 mgSource →
    • Route: INTRAVASCULAR; Dosage form: SOLUTION; Potency: NASource →
  • GLOBALJECFAEvaluatedJECFA evaluation record.
  • USEPAcommercial use observedEPA CPDat observed this chemical in 5627 composition records across product categories including Cleaning and safety, Construction and building materials, Furniture and furnishings. EPA CPDat classifies this chemical for functional uses including pH regulating agent, potassium soaps, alkaline batteries.
    • EPA CPDat observed this chemical in 5627 composition records across product categories including Cleaning and safety, Construction and building materials, Furniture and furnishings. EPA CPDat classifies this chemical for functional uses including pH regulating agent, potassium soaps, alkaline batteries.Source →
  • USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 1 drug products and 1 package presentations.
    • FDA NDC lists this ingredient in 1 drug products and 1 package presentations.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

  • JECFA

    Joint FAO/WHO Expert Committee on Food Additives

  • EFSA

    European Food Safety Authority

    No EFSA opinion on file.

Evidence & sources

No graded research studies for Potassium hydroxide yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

8 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated september 30, 2013

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA Inactive Ingredient Database

    regulatory · updated 2026-01-09

    Open →

  • FDA National Drug Code Directory

    regulatory · updated 2026-09-30

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • WHO JECFA Database

    regulatory · updated 2026-10-04

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →
Reference links (1)
Openfda substance

codexalimentarius.net

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Potassium hydroxide in a product composition. These are source records, not Greenveil catalog products.

Source records

5,627

Named organisations

6

Cleaning and safetyConstruction and building materialsFurniture and furnishingsRaw materialsPersonal careCleaning products and household care

Typical roles

Chelating agentpH adjuster
See products using Potassium hydroxide →

Catalog

Found in these products

Their ingredient lists include Potassium hydroxide; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 415 →Find products without it →