Dihydroxypropyl Cystine

INCI: DIHYDROXYPROPYL CYSTINE

CAS Number
Not widely assigned in public databases (CosIng-listed INCI)
Function
Hair conditioning, keratin repair agent (cystine-glycerol adduct for disulfide bond mimicry)
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Permitted โ€” no CFR restriction

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Dihydroxypropyl Cystine is a mild, neutralized keratin repair agent distinct from the corrosive L-Cystine dihydrochloride; confirm supplier SDS to avoid substance confusion.

โš ๏ธ
Concern Level: Low

Frequently Asked Questions

Is Dihydroxypropyl Cystine safe in cosmetics?

Dihydroxypropyl Cystine is a mild, neutralized keratin repair agent distinct from the corrosive L-Cystine dihydrochloride; confirm supplier SDS to avoid substance confusion. The EU classifies Dihydroxypropyl Cystine as "permitted". Safety rating: GOOD.

Is Dihydroxypropyl Cystine allowed in the EU?

Dihydroxypropyl Cystine EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Dihydroxypropyl Cystine do in cosmetics?

Dihydroxypropyl Cystine functions as: Hair conditioning, keratin repair agent (cystine-glycerol adduct for disulfide bond mimicry). It is classified as a cosmetic ingredient in our database. CAS number: Not widely assigned in public databases (CosIng-listed INCI).

What is the Margin of Safety for Dihydroxypropyl Cystine?

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.

๐Ÿ“ฑ

Is Dihydroxypropyl Cystine in Your Products?

Scan any product label with Piro โ€” our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.

Try Piro Free โ†’

Analyze Your Full Ingredient List

Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Dihydroxypropyl Cystine in your formulation.