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Bronopol

CAS 133248-96-1 · 20/100 · High conf.

Also registered as 3 other CAS numbers

179733-60-9 · 1135443-73-0 · 52-51-7

Bronopol chemical structure

Concern score

20/100Minor concern based on regulatory listings.
High confidence

Bronopol in plain language

What it is

On cosmetic ingredient lists it appears as “2-BROMO-2-NITROPROPANE-1”.

Also known as 2-BROMO-2-NITROPROPANE-1 · 2-BROMO-2-NITROPROPANE-1,3-DIOL · 3-DIOL · 1,3-Propanediol, 2-bromo-2-nitro- · 2-BROM-2-NITRO-1,3-PROPANDIOL · 2-BROMO-2-NITRO-, 1,3-PROPANDIOL

Show all 25 names

2-Bromo-2-nitropropan-1,3-diol · 2-Nitro-2-bromo-1,3-propanediol · 2-bromo-2-nitro-1, 3-propanediol · 2-bromo-2-nitro-1,3-propanediol (BNP) · 2-bromo-2-nitro-propane-1,3-diol · Acticide L 30 · Bronidiol · Bronocot · Bronopolu · Bronopolum · Bronosol · Bronotak · Lexgard bronopol · Onyxide 500 · Remain Gold · Remain Silver · beta-Bromo-beta-nitrotrimethyleneglycol · bronopol (cas # 52-51-7) · bronopol (inn)

What it does

Used in cosmetics as a preservative.

  • Preservative
  • Deodorant
  • Antimicrobial
Is it a concern?
Minor concern: no hazard classifications on record. It is listed for cosmetic use in the EU.

What the listings say

Permitted, with conditions — Bronopol appears on published "allowed" regulatory lists rather than on a restriction list.

Bronopol is listed in Annex V of the EU Cosmetics Regulation (EC) 1223/2009 (preservatives allowed in cosmetic products).

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Bronopol appears in these published regulatory listings.

  • EU Annex V — permitted preservative
  • EU permitted preservative

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Industrial
  • EUCosIngActive2 entries
    • 2-Bromo-2-Nitropropane-1,3-Diol is a substituted aliphatic diol that conforms to the formula: Restriction: V/21Source →
    • Cosmetics Regulation annex V / ref 21.Source →
  • EUECallowed_listedAnnex V of EU Cosmetics Regulation (EC) 1223/2009: preservatives allowed in cosmetic products. Maximum concentration: 0.1% Other conditions: Avoid formation of nitrosamines
    • Annex V of EU Cosmetics Regulation (EC) 1223/2009: preservatives allowed in cosmetic products. Maximum concentration: 0.1% Other conditions: Avoid formation of nitrosaminesSource →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 173 composition records across product categories including Cleaning and safety, Furniture and furnishings, Specialty occupational products. EPA CPDat classifies this chemical for functional uses including Preservative, Biocide, Processing aids not otherwise specified.
    • EPA CPDat observed this chemical in 173 composition records across product categories including Cleaning and safety, Furniture and furnishings, Specialty occupational products. EPA CPDat classifies this chemical for functional uses including Preservative, Biocide, Processing aids not otherwise specified.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for Bronopol. 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 Bronopol yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

7 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2021-08-02

    Open →

  • EPA Chemical and Products Database

    exposure · updated march 20, 2017

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

Suitability

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

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

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

Source records

173

Named organisations

6

Cleaning and safetyFurniture and furnishingsSpecialty occupational productsCleaning products and household careIndustrial productsLaboratory supplies

Typical roles

PreservativeDeodorantAntimicrobial
See products using Bronopol →

Catalog

Found in these products

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

See all 74 →Find products without it →