“Direct skin-benefit evidence for sodium sulfite is limited; its closest cosmetic benefit is formulation antioxidant/preservative use in sulfite ingredients, helping protect oxidizable formulas rather than acting as a proven skin active.”
Sodium Sulfite (Anhydrous)
Cosmetics
Code: 8114
It is commonly used as an antioxidant in hair dye perment formulas.
Sodium Sulfite is commonly used as an antioxidant in perment hair dye formulas.
Usage: For hair color products
Mixing method: Mix in water
Product characteristics: White flake powder
Solubility: Can dissolve in water
Storage: Can be stored at room temperature Covered from sunlight, heat, the product is at least 2 years old.
INCI Name : Sodium Sulfite
- Room (25-40C)
- 24 Months from manufacturing or testing date.
- 0.00% - 0.00%
- 0.00%
- Please follow instruction under product info carefully.
- Heat Tolerant
- 0.00 - 0.00
- Soluble in Water
- -
| Test Name | Specification |
|---|---|
| Na2SO3 | min. 97.5 g/100g |
| SO2 | min. 49.5 g/100g |
| pH-Wert (50g/l) | 8.5 - 10.5 pH |
| Chloride | max. 50 mg/kg |
| Fe | max. 10 mg/kg |
| Heavy metals as Pb | max. 10 mg/kg |
| NA2SO4 | remainder |
“Closest ingredient-family evidence: sulfites are recognized antioxidants and preservatives in personal care products, but are more strongly documented as potential contact allergens than as skin-benefit actives.”
“General topical-antioxidant evidence: oxidative stress contributes to skin damage and dermatologic disease; antioxidant strategies can support photoprotection and anti-inflammatory skin-care concepts, but this is not sodium-sulfite-specific.”
“Closest formulation evidence: sodium metabisulfite, a related sulfite antioxidant, was studied for stabilizing vitamin C in cosmetic emulsions/gels, supporting its use as a formula-protective antioxidant rather than a direct skin active.”
“Safety-relevant skin evidence: sodium sulfite can cause allergic contact dermatitis in some users, so any antioxidant formulation benefit must be balanced with sensitization risk.”
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