Crotonaldehyde

INCI: CROTONALDEHYDE

CAS Number
4170-30-3 (mixture); 123-73-9 (E-isomer)
Function
Not a cosmetic ingredient
Safety Rating
POOR

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status prohibited
๐Ÿ‡บ๐Ÿ‡ธ US Status prohibited
US Notes Not permitted for intentional cosmetic use. OSHA-regulated workplace exposure limits (PEL 2 ppm). Classified as reasonably anticipated to be a human carcinogen (NTP).

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
high

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Do not use. EU Annex II prohibited. CMR substance. IARC Group 3 / NTP reasonably anticipated carcinogen. Extremely corrosive with explosive hazard potential. May appear as contaminant in some aldehyde-containing fragrance ingredients.

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Concern Level: High

Regulatory Flags

endocrine_disruptor

Frequently Asked Questions

Is Crotonaldehyde safe in cosmetics?

Do not use. EU Annex II prohibited. CMR substance. IARC Group 3 / NTP reasonably anticipated carcinogen. Extremely corrosive with explosive hazard potential. May appear as contaminant in some aldehyde-containing fragrance ingredients. The EU classifies Crotonaldehyde as "prohibited". Safety rating: POOR.

Is Crotonaldehyde allowed in the EU?

Crotonaldehyde EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

What does Crotonaldehyde do in cosmetics?

Crotonaldehyde functions as: Not a cosmetic ingredient. It is classified as a cosmetic ingredient in our database. CAS number: 4170-30-3 (mixture); 123-73-9 (E-isomer).

What is the Margin of Safety for Crotonaldehyde?

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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