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Hair Conditioning

THIOLANEDIOL

CAS 3976-75-8
55

Safety score · 0–100

Moderate

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A small sulfur diol related to thiol chemistry — used as a hair-reducing or conditioning agent. Smells of sulfur and can irritate; cosmetic safety data are thin so use is cautious.

Function

SOLVENT

Skin benefits

  • Sulfur-containing reducing agent
  • May condition hair
  • Used in keratin chemistry

Known concerns

  • Thiol odor and irritation potential
  • Limited cosmetic safety review
  • Possible eye irritation

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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55
ACRYLAMIDOPROPYLTRIMONIUM CHLORIDE/ACRYLAMIDE COPOLYMER
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ADIPIC ACID/EPOXYPROPYL DIETHYLENETRIAMINE COPOLYMER
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AMIDINOCYSTEINE
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BEHENYL HYDROXYETHYL IMIDAZOLINE
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BIS-(MORPHOLINOMETHYL C1-4 DIALKOXYSILOXY) DIMETHICONE
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BIS-HYDROXYETHYL TALLOWMONIUM CHLORIDE
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CETETHYLDIMONIUM BROMIDE
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 55
CETRIMONIUM CHLORIDE
Hair Conditioning

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.