SODIUM SULFITE
Commonly Found In
Overview
Sodium sulfite is an inorganic antioxidant and reducing agent used in cosmetics, particularly in hair waving/straightening products and as a preservative antioxidant in formulations. It is restricted in EU cosmetics (Annex III/99, V/9) and UK. Approximately 1% of the general population has sulfite sensitivity, which can cause allergic and asthmatic reactions; cosmetic use may exacerbate this. Studies suggest it effectively prevents oxidative degradation of active ingredients in formulations when used as an antioxidant.
Also known as: Sodium Sulfite, Disodium Sulfite, Sulfurous Acid Disodium Salt, E221
Key Benefits
Studies suggest sodium sulfite effectively prevents oxidative degradation of active ingredients in formulations; as an antioxidant preservative it may help extend product shelf life and maintain efficacy of oxygen-sensitive actives.
Skin Compatibility Ratings
Comedogenic Rating
Non-comedogenic; inorganic antioxidant/reducing agent at low cosmetic concentrations.
Source: CIR Expert Panel; physicochemical properties
Irritancy Rating
Low direct skin irritancy at cosmetic concentrations; primary concern is sulfite hypersensitivity (asthmatic/allergic reactions) in sensitive individuals (approx. 1% of population)
Source: EU Annex III/99 restriction rationale; CIR assessment
Typical Use Concentration
Range
0.1β0.5% (antioxidant use); 1β5% (hair waving)
Optimal
0.1β0.3% as antioxidant preservative
EU Annex III/99 restricts concentration. Typically used at very low concentrations as antioxidant stabilizer in formulations. Hair waving/straightening use requires specific product type restrictions.
Works Well With / Avoid
Works Well With
Avoid Combining
Use With Caution
EU restricts sodium sulfite in cosmetics (Annex III/99). Products containing sulfites may require labeling for sulfite-sensitive consumers. Not for use with oxidizing actives.
Commonly Found In
Global Regulation Summary
Overview of current status across major international markets.
Detailed Regional Status
| Region | Status | Max Conc. | Conditions | Source |
|---|---|---|---|---|
| πͺπΊ EU | Banned | - | - | Official β |
| πΊπΈ USA | Allowed | - | - | Official β |
| π―π΅ Japan | Allowed | - | - | Official β |
| π°π· Korea | Unknown | - | - | Official β |
| π¬π§ UK | Restricted | - | Follows EU regulations (III/99 V/9) | Official β |
π Why Regulations Differ
The EU restricts sodium sulfite under Annex III/99 (and Annex V/9 for preservative use) primarily due to sulfite hypersensitivity concerns. The US and Japan permit cosmetic use without specific restrictions beyond general safety requirements. EU restriction reflects the precautionary approach to potential sensitization in susceptible individuals.
Regulation Analysis
Regional Agreement
Banned in EU but allowed in USA, Japan.
Category Comparison
There are 59 ingredients in the ANTIOXIDANT category. 88% are banned in at least one major market.
Strictness Ranking
πΏ Natural Sources
Not commonly found in nature in significant amounts. Forms naturally when sulfur dioxide dissolves in alkaline waters. Some hot springs contain sodium sulfite.
π How It's Made
Produced by reacting sulfur dioxide with sodium hydroxide or sodium carbonate solution. Also obtained as a byproduct of flue gas desulfurization in power plants.
π Uses in Cosmetics
Used in cosmetic products primarily for antioxidant, hair waving or straightening, preservative, reducing.
π¬ Other Applications
Used in food preservation (E221), photography, paper pulp bleaching, water treatment, textile bleaching, and as an antioxidant in pharmaceutical products.
π‘ Fun Facts
- β’ Sodium sulfite is the 'magic ingredient' in developing black-and-white photographs β it acts as a preservative for the developer solution
- β’ The ancient Romans used sulfur dioxide (which forms sulfite in water) to preserve wine β a practice still used 2,000 years later
- β’ People with sulfite sensitivity (about 1% of the population) can have severe asthmatic reactions to foods preserved with sulfites
Related Skin Concerns
Data Sources
- β’ EU CosIng database (Annex III/99, V/9)
- β’ CIR Expert Panel assessment on sulfites in cosmetics
- β’ FDA cosmetics ingredient status
Last data verification: 2026-04-16
Related Ingredients
SODIUM BISULFITE
AMMONIUM THIOGLYCOLATE
RADIUM ORE POWDER
5-Hydroxy-2-hydroxymethyl-4-pyrone
KOJIC ACID
BENZALKONIUM CHLORIDE
BENZYL ALCOHOL
Learn More
Frequently Asked Questions
Why is SODIUM SULFITE banned in the EU but allowed in the US?
The EU follows a precautionary principle, banning SODIUM SULFITE under III/99 V/9 due to potential safety concerns. The US FDA has not found sufficient evidence to prohibit its use, allowing it under different safety assessment standards. This reflects differing regulatory philosophies between the two regions.
Why is SODIUM SULFITE banned in the EU but allowed in Japan?
The EU prohibits SODIUM SULFITE (III/99 V/9) based on their strict safety criteria. Japan's Ministry of Health, Labour and Welfare (MHLW) has evaluated the ingredient and permits its use, potentially with different safety data or usage conditions.
What is SODIUM SULFITE used for in cosmetics?
SODIUM SULFITE is primarily used for antioxidant in cosmetic products. It also serves as hair waving or straightening, preservative. The ingredient is commonly found in anti-aging serums and creams.
Which countries regulate SODIUM SULFITE?
SODIUM SULFITE is banned in EU. It has concentration limits or usage restrictions in UK. The ingredient is freely allowed in JP, US.
Are there alternatives to SODIUM SULFITE?
Due to regulatory restrictions on SODIUM SULFITE, cosmetic manufacturers often use alternative ingredients with similar functions. For antioxidant, alternatives may include other approved ingredients in the same category. Consult product labels for specific formulations, and look for products compliant with your region's regulations.
Disclaimer
The information on this website is for educational and informational purposes only and is not intended as medical advice. While we strive for accuracy based on official government databases, cosmetic regulations change frequently. Always consult with a qualified professional or refer to the latest official regulatory documents for compliance. We are not responsible for any actions taken based on the information provided here.