Is Dimethyl Diacetyl Cystinate safe in cosmetics?
Dimethyl Diacetyl Cystinate has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
MODERATE
Cosmetic Ingredient
Dimethyl Diacetyl Cystinate
INCI: DIMETHYL DIACETYL CYSTINATE
Dimethyl Diacetyl Cystinate (CAS 139612-43-4 (dl-form, COSING) ; 32381-28-5 (L-form, N,N′-Diacetyl-L-cystine dimethyl ester)) is a cosmetic cosmetic ingredient functioning as Hair conditioning. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
CAS Number
139612-43-4 (dl-form, COSING) ; 32381-28-5 (L-form, N,N′-Diacetyl-L-cystine dimethyl ester)
View industrial chemical safety profile →
Function
Hair conditioning
Editorial assessment
MODERATE
Preliminary editorial note — not a computed safety verdict.
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Permitted — no CFR prohibition; not CIR-reviewed as individual ingredient
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Dimethyl Diacetyl Cystinate.
Calculate MoS for your specific formulation with the MoS Calculator.
Editorial summary
Preliminary editorial summary for Dimethyl Diacetyl Cystinate — not a computed safety verdict. See the sourced toxicological data above.
Frequently Asked Questions
Is Dimethyl Diacetyl Cystinate allowed in the EU?
Dimethyl Diacetyl Cystinate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Dimethyl Diacetyl Cystinate do in cosmetics?
Dimethyl Diacetyl Cystinate functions as: Hair conditioning. It is classified as a cosmetic ingredient in our database. CAS number: 139612-43-4 (dl-form, COSING) ; 32381-28-5 (L-form, N,N′-Diacetyl-L-cystine dimethyl ester).
Compliance Tools
Check Dimethyl Diacetyl Cystinate 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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