Skip to content

Hair Conditioning

DITHIODIGLYCOLIC ACID

CAS 505-73-7 Updated
55

Safety score · 0–100

Moderate

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

About

A disulfide-linked carboxylic acid used in hair-perming chemistry to rearrange disulfide bonds. Functional but not a leave-on; expect irritation at high concentration.

Function

REDUCING

Skin benefits

  • Used as reducing-agent precursor in perms
  • Sulfur source for hair restructuring

Known concerns

  • Strong sulfur odour and potential skin irritation
  • Acid corrosivity at neat strength
  • Limited cosmetic safety data

References

EU

EU CosIng database

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

Related hair conditionings

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

Check your shelf

Find DITHIODIGLYCOLIC ACID in your products.

Scan any cosmetic product with LuxSense to see if it contains DITHIODIGLYCOLIC ACID and get a full ingredient breakdown with safety scores.

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