Is 2-Methylpent-2-Enoic Acid safe in cosmetics?
2-Methylpent-2-Enoic Acid has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
MODERATE
Cosmetic Ingredient
2-Methylpent-2-Enoic Acid
Also known as: 2-Methyl-2-pentenoic acid, 2-Pentenoic acid, 2-methyl-, EINECS 221-552-0, FEMA No. 3195
2-Methylpent-2-Enoic Acid (CAS 3142-72-1) is a cosmetic cosmetic ingredient functioning as Flavouring and nutrient; Fragrance. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety and food safety data.
Cross-Vertical Regulatory Divergence
2-Methylpent-2-Enoic Acid is classified GHS Danger (H314, H318) in the chemicals database but is allowed in EU cosmetics.
Source: Cosmetics: ingredients.eu status; Chemicals: ghs classifications.signal word/hazard statement code
Function
Flavouring and nutrient; Fragrance
Editorial assessment
MODERATE
Preliminary editorial note — not a computed safety verdict.
Chemistry & Identifiers
IUPAC Name
(E)-2-methylpent-2-enoic acid
InChIKey
JJYWRQLLQAKNAD-SNAWJCMRSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for 2-Methylpent-2-Enoic Acid.
Calculate MoS for your specific formulation with the MoS Calculator.
HRIPT Human Patch Test Studies
1 human repeat insult patch test aggregated from dermatological literature.
| Test Type | N | Sensitized | Dose µg/cm² | NESIL µg/cm² | Potency |
|---|---|---|---|---|---|
| HMT | - | 0 | 1350 | - | - |
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Flavouring and nutrient
Fragrance
Regulatory List Membership (3)
IFRA Fragrance Transparency List
FDA Substances Added to Food (EAFUS)
Consumer Product Chemical
Editorial summary
Preliminary editorial summary for 2-Methylpent-2-Enoic Acid — not a computed safety verdict. See the sourced toxicological data above.
Regulatory Flags
fragrance-component
natural-origin
ifra_fragrance
fda_food_additive
Known Synonyms
2-Methyl-2-pentenoic acid
2-Pentenoic acid, 2-methyl-
EINECS 221-552-0
FEMA No. 3195
Chemical Function
Fragrance
Flavouring and nutrient
Regulatory Lists
Europe
food_additive; Substances Added to Food (formerly EAFUS) (2/2019)
consumer_product
IFRA Transparency
consumer_product
Australian Status
AICIS status: listed
Cross-Vertical Safety Context
Same-CAS public records found in food safety data.
SOURCE
EFSA / FDA GRAS
food_additives
Food Safety Data
Same-CAS food additive or FDA GRAS records from the core public database.
Food Name
2-METHYL-2-PENTENOIC ACID
ADI
No safety concern at current levels of intake when used as a flavouring agent mg/kg bw
Food Category
flavoring
Frequently Asked Questions
Is 2-Methylpent-2-Enoic Acid allowed in the EU?
2-Methylpent-2-Enoic Acid EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does 2-Methylpent-2-Enoic Acid do in cosmetics?
2-Methylpent-2-Enoic Acid functions as: Flavouring and nutrient; Fragrance. It is classified as a cosmetic ingredient in our database. CAS number: 3142-72-1.
Is 2-Methylpent-2-Enoic Acid used outside cosmetics?
2-Methylpent-2-Enoic Acid also appears in industrial chemical safety and food safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does 2-Methylpent-2-Enoic Acid have different safety status in cosmetics vs industrial chemicals?
2-Methylpent-2-Enoic Acid is classified GHS Danger (H314, H318) in the chemicals database but is allowed in EU cosmetics.
Compliance Tools
Check 2-Methylpent-2-Enoic Acid compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
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