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Acetaldehyde

CAS 557-75-5 · 100/100 · High conf.

Also registered as 1 other CAS number

75-07-0

Acetaldehyde chemical structure

Concern score

100/100Critical concern driven by cmr.
High confidence

Acetaldehyde in plain language

What it is

Also known as Acetaldehyde; ethanal · Acetic aldehyde · Carmustine related compound, acetaldehyde- · Ethylaldehyde · Acetaldehyd · Acetaldehyde 1501

Show all 30 names

Acetaldehyde Phenolic · Acetic ethanol · Acetylaldehyde · Aldehyde acetique · Aldeide acetica · Ethenol · Ethanal · Ethyl aldehyde · Hydroxyethene · Hydroxyethylene · NCI-C56326 · Octowy aldehyd · RCRA waste number U001 · Un 1089 · Vinyl alcohol · acetaldehido · acetaldehyde %: 0.095 · acetaldehyde (sara 313) (cercla) · acetaldehyde (sara 313) (cercla) % wt: 0.06 ppm · acetaldehyde (sara 313) (cercla) % wt: 20 ppm · acetaldehyde (sara 313) (cercla) % (wt): 10 ppm · acetaldehyde (sara iii) · acetaldehyde (sara iii).osha and acgih stel 150 ppm. · acetaldehyde (suspect human carcinogen)

What it does

Used in cosmetics as a fragrance ingredient. Acetaldehyde is the aldehyde.

  • Fragrance
  • Solvent
  • Flavouring
  • Conditioner
  • Deodorant
Is it a concern?
Critical concern: classified for carcinogenic, mutagenic or reproductive toxicity (CMR). It is banned in EU cosmetics.

Why it's flagged

  • Cmr

Acetaldehyde; ethanal is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — banned

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

Restrictions first, then routine listings from published regulatory sources.

  • In marketed US drugs
  • EU Annex II — prohibited
  • EU prohibited in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Cleaning
  • Pharma
  • Industrial
  • EUEC

    Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Carcinogenic Cat. 1B(),Mutagenic Cat. 2()

    banned
    View source →
  • EUCosIngActive2 entries
    • Acetaldehyde is the aldehyde that conforms to the formula: Restriction: II/1391Source →
    • Cosmetics Regulation annex II / ref 1391.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 201 composition records across product categories including Furniture and furnishings, Cleaning products and household care, Electronics/small appliances. EPA CPDat classifies this chemical for functional uses including Deodorizer, Softener and conditioner, Processing aids not otherwise specified.
    • EPA CPDat observed this chemical in 201 composition records across product categories including Furniture and furnishings, Cleaning products and household care, Electronics/small appliances. EPA CPDat classifies this chemical for functional uses including Deodorizer, Softener and conditioner, Processing aids not otherwise specified.Source →
  • USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 19 active drug products and 23 total products.
    • FDA NDC lists this ingredient in 19 active drug products and 23 total products.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 Acetaldehyde. 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 Acetaldehyde 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

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2020-07-30

    Open →
  • EPA Chemical and Products Database

    exposure · updated october 15, 2019

    Open →
  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →
  • FDA National Drug Code Directory

    regulatory · updated 2029-04-29

    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.

Fragrance avoidance

Not a strong fit for fragrance avoidance because it carries Fragrance.

Avoid

The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.

Where it has been recorded

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

Source records

201

Named organisations

6

Furniture and furnishingsCleaning products and household careElectronics/small appliancesVehicleHome maintenanceLaboratory supplies

Typical roles

FragranceSolventFlavouringConditionerDeodorant
See products using Acetaldehyde →

Catalog

Found in these products

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