Is S-Allylcysteine safe in cosmetics?
S-Allylcysteine has a safety rating of "GOOD" in our database. EU status: permitted. US status: permitted.
Good
Cosmetic Ingredient
S-Allylcysteine
Also known as: L-Cysteine, S-2-propenyl-, S-Allyl cysteine, UNII-81R3X99M15
INCI: S-ALLYLCYSTEINE
S-Allylcysteine (CAS 21593-77-1) is a cosmetic cosmetic ingredient functioning as Bleaching (skin lightening), Antioxidant. 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 pharmaceutical data.
View industrial chemical safety profile for CAS 21593-77-1 →
Auto-generated CPSR Part A draft with source citations
Function
Bleaching (skin lightening), Antioxidant
Safety Rating
GOOD
Chemistry & Identifiers
IUPAC Name
(2R)-2-amino-3-prop-2-enylsulfanylpropanoic acid
InChIKey
ZFAHNWWNDFHPOH-YFKPBYRVSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
GRAS as food substance (FEMA No. 4322); FDA UNII: 81R3X99M15; cosmetic use under general safety
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for S-Allylcysteine.
Calculate MoS for your specific formulation with the MoS Calculator.
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Regulatory (6)
JECFA Number
1710
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
JECFA Evaluation
(+)-S-ALLYLCYSTEINE | 2007 | No safety concern at current levels of intake when used as a flavouring agent | TRS 947-JECFA68/ | FAS 59-JECFA68/
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
JECFA Evaluation
S-ALLYLCYSTEINE | 2007 | No safety concern at current levels of intake when used as a flavouring agent | TRS 947-JECFA68/ | FAS 59-JECFA68/
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
JECFA Evaluation
(2R)-3-(ALLYLTHIO)-2-AMINOPROPANOIC ACID | 2007 | No safety concern at current levels of intake when used as a flavouring agent | TRS 947-JECFA68/ | FAS 59-JECFA68/
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
JECFA Evaluation
(R)-ALLYLTHIO-2-AMINOPROPANOIC ACID | 2007 | No safety concern at current levels of intake when used as a flavouring agent | TRS 947-JECFA68/ | FAS 59-JECFA68/
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Bleaching agent
Flavouring and nutrient
Regulatory List Membership (1)
FDA Substances Added to Food (EAFUS)
Expert Verdict
Expert safety assessment and concern-level summary for S-Allylcysteine.
Regulatory Flags
fda_food_additive
Known Synonyms
L-Cysteine, S-2-propenyl-
S-Allyl cysteine
UNII-81R3X99M15
Chemical Function
Bleaching agent
Flavouring and nutrient
Regulatory Lists
Europe
food_additive; Substances Added to Food (formerly EAFUS) (2/2019)
Cross-Vertical Safety Context
Same-CAS public records found in pharmaceutical data.
SOURCE
ChEMBL / DrugCentral / FAERS
DB_PHARMA CAS match
Pharmaceutical Data
Same-CAS rows from the pharmaceutical spoke database.
ChEMBL ID
CHEMBL2048654
Frequently Asked Questions
Is S-Allylcysteine allowed in the EU?
S-Allylcysteine EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does S-Allylcysteine do in cosmetics?
S-Allylcysteine functions as: Bleaching (skin lightening), Antioxidant. It is classified as a cosmetic ingredient in our database. CAS number: 21593-77-1.
Is S-Allylcysteine used outside cosmetics?
S-Allylcysteine also appears in industrial chemical safety and pharmaceutical data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check S-Allylcysteine compliance across multiple jurisdictions:
Ingredient Decoder
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Substance Compliance
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MoS Calculator
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Heavy Metal Limits
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Chemical family
Bleaching
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Browse nearby
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