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Boric acid

CAS 10043-35-3

Also registered as 1 other CAS number

11113-50-1

Concern score

Not assessed — no hazard data yet.

Boric acid in plain language

What it is

Also known as Crude natural boric acid · acidum boricum · natural boric acid · potassium metaborate (boric acid)

What it does

Used in cosmetics as an antimicrobial, a pH buffer and a denaturant.

  • Antimicrobial
  • Buffering
  • Denaturant
  • pH adjuster
  • Stabiliser
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Boric acid appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • EUCosIngActiveRestriction: Regulation (EU) 2019/831. Entry II/1395
    • Restriction: Regulation (EU) 2019/831. Entry II/1395Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 7 composition records across product categories including Raw materials. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Biocide, Stabilizing agent.
    • EPA CPDat observed this chemical in 7 composition records across product categories including Raw materials. EPA CPDat classifies this chemical for functional uses including pH regulating agent, Biocide, Stabilizing agent.Source →

Expert safety opinions

No expert opinion on file for Boric acid. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • 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.

Evidence & sources

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

2 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • EPA Chemical and Products Database

    exposure · updated may 8, 2017

    Open →

Suitability

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

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 Boric acid in a product composition. These are source records, not Greenveil catalog products.

Source records

7

Named organisations

3

Raw materials

Typical roles

AntimicrobialBufferingDenaturantpH adjusterStabiliser
See products using Boric acid →

Catalog

Found in these products

Cosmetic and personal-care products that list Boric acid are shown first. Their ingredient lists include Boric acid; each product's own rating depends on its whole formula, so it is shown on the product page, not here.