Skip to content

Antioxidant

SODIUM BISULFITE

CAS 7631-90-5 Updated
45

Safety score · 0–100

Moderate

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

About

A sulfite reducing agent used as antioxidant and in hair-relaxers. Effective at low concentrations but a recognized allergen and asthma trigger for sensitive people.

Function

ANTIOXIDANTHAIR WAVING OR STRAIGHTENINGPRESERVATIVEREDUCING

Skin benefits

  • Antioxidant and reducing agent
  • Stabilizes color and prevents browning
  • Hair-relaxing chemistry

Known concerns

  • Sulfite — known allergen and asthma trigger for sensitive individuals
  • EU mandates labeling as allergen above threshold
  • Releases SO2 in acidic conditions

References

EU

EU CosIng database

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

Related antioxidants

45
SCOPARONE
Antioxidant
 44
DIPEPTIDE-20 HEXAPEPTIDE-40 OLIGOPEPTIDE-93 RH-POLYPEPTIDE-68 TETRAPEPTIDE-35
Antioxidant
 42
AMBROSIA TRIFIDA EXTRACT
Antioxidant
 48
ANNONA MURICATA LEAF/STEM EXTRACT
Antioxidant
 48
EMBELIA RIBES FRUIT EXTRACT
Antioxidant
 42
EUPHORBIA MACULATA EXTRACT
Antioxidant
 42
GRAPHENE OXIDE
Antioxidant
 48
HYDROXYLATED FULLERENES
Antioxidant

Check your shelf

Find SODIUM BISULFITE in your products.

Scan any cosmetic product with LuxSense to see if it contains SODIUM BISULFITE 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.