Fragrance avoidance
Nothing to weigh for this context yet.
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.
- beauty
L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester
CAS 64519-44-4
Also registered as 1 other CAS number
68127-22-0
Concern score
Not assessed — no hazard data yet.
L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester in plain language
On cosmetic ingredient lists it appears as “Menthyl PCA”.
Also known as Menthyl PCA · Menthyl pyrrolidone carboxylate, l-(-)- · (-)-menthyl l-pidolate · (-)-menthyl l-pyroglutamate · (-)-menthyl l-pyrrolidone carboxylate · Menthyl pyroglutamate, (-),l-
Show all 10 names
Menthyl pyrrolidone carboxylate, (-)- · (-)-Menthyl (-)-2-pyrrolidone-5-carboxylate · Menthyl pyrrolidone carboxylate, (-),L- · UNII-C7ZIB25BE7
Used in cosmetics as a humectant and a skin-conditioning agent.
- Humectant
- Skin conditioning
- We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.
What we know about this ingredient
EPA DSSTox provides the canonical identifier, structure, and synonym profile for this chemical.
Regulation
No restrictions found. L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester appears in these published regulatory listings.
Expert safety opinions
No expert opinion on file for L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester. 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 L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
No signal in this context
Found in these products
Cosmetic and personal-care products that list L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester are shown first. Their ingredient lists include L-Proline, 5-oxo-, (1R,2S,5R)-5-methyl-2-(1-methylethyl)cyclohexyl ester; each product's own rating depends on its whole formula, so it is shown on the product page, not here.
