SODIUM BENZOATE
Commonly Found In
Overview
SODIUM BENZOATE is the sodium salt of benzoic acid, used in cosmetics as a preservative with antimicrobial properties effective against bacteria, yeast, and molds, particularly at acidic pH. It is among the most widely used food and cosmetic preservatives globally. In cosmetics, the EU permits sodium benzoate at a maximum of 2.5% (expressed as benzoic acid) except in oral hygiene products where the maximum is 0.5%. Japan and the US permit its use without a specific cosmetic cap. Sodium benzoate can react with ascorbic acid under certain conditions to form trace amounts of benzene, which has led to formulation guidance in food products, though this reaction is less relevant in most cosmetic applications.
Also known as: Sodium Benzoate, Benzoic acid sodium salt, E211 (food additive)
Key Benefits
Sodium benzoate functions as a preservative rather than an active skin ingredient. Studies confirm its effectiveness against a broad range of microorganisms at concentrations as low as 0.1% in acidic formulations, contributing to product safety and shelf life without direct skin-conditioning benefits.
Supporting Research
- β’ CIR Expert Panel β safety assessment of sodium benzoate and benzoic acid in cosmetics
Skin Compatibility Ratings
Comedogenic Rating
Non-comedogenic at preservative concentrations
Source: CIR Expert Panel; cosmetic dermatology consensus
Irritancy Rating
Generally well tolerated; rare contact sensitization possible. Some individuals with salicylate sensitivity may react to benzoate preservatives.
Source: CIR Expert Panel; contact dermatitis literature
Typical Use Concentration
Range
0.1β2.5%
Optimal
0.5β1%
EU Annex V maximum: 2.5% as benzoic acid (0.5% in oral hygiene). US and Japan permit use. Most effective in acidic formulations (pH < 5).
Works Well With / Avoid
Works Well With
Use With Caution
Most effective at pH 2.5β5.0; efficacy decreases sharply at higher pH. Avoid direct combination with ascorbic acid in leave-on products with heat/light exposure due to potential benzene formation (trace amounts). EU max 2.5%.
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 | Allowed | - | - | Official β |
| πΊπΈ USA | Allowed | - | - | Official β |
| π―π΅ Japan | Allowed | - | - | Official β |
| π°π· Korea | Unknown | - | - | Official β |
| π¬π§ UK | Banned | - | Follows EU regulations (V/1) | Official β |
π Why Regulations Differ
Sodium benzoate is permitted in EU (Annex V, max 2.5%), US, and Japan. The reduced limit for oral hygiene products (0.5%) in the EU reflects different exposure considerations. The benzene-formation concern when combined with ascorbic acid led to reformulation of some carbonated beverages but is less relevant in most cosmetics.
Regulation Analysis
Regional Agreement
Banned in UK but allowed in EU, USA, Japan.
Category Comparison
There are 8 ingredients in the ANTICORROSIVE category. 100% are banned in at least one major market.
Strictness Ranking
πΏ Natural Sources
Benzoic acid (the parent compound) occurs naturally in cranberries, prunes, cinnamon, cloves, and other fruits and spices. Sodium benzoate itself is the sodium salt form, typically manufactured.
π How It's Made
Produced by neutralizing benzoic acid with sodium hydroxide. Benzoic acid is manufactured by partial oxidation of toluene using air and a cobalt or manganese catalyst.
π Uses in Cosmetics
Used in cosmetic products primarily for anticorrosive, fragrance, preservative.
π¬ Other Applications
One of the most widely used food preservatives (in soft drinks, salad dressings, jams). Also used in pharmaceuticals, fireworks, automotive antifreeze, and as a corrosion inhibitor.
π‘ Fun Facts
- β’ Sodium benzoate was the first preservative approved by the FDA for use in food, back in 1908
- β’ When combined with vitamin C (ascorbic acid) and heat/light, sodium benzoate can form small amounts of benzene, a known carcinogen β this led to reformulation of some soft drinks
- β’ It's used in fireworks to produce a whistling sound when the firework is launched
Data Sources
- β’ EU Cosmetics Regulation Annex V (preservatives)
- β’ CIR Expert Panel safety assessment of benzoic acid and sodium benzoate
- β’ FDA cosmetic preservative database
- β’ Japan MHLW cosmetic ingredient database
Last data verification: 2026-04-12
Related Ingredients
BENZOIC ACID
BUTYLPARABEN
ETHYLPARABEN
METHYLPARABEN
PHENOL
POTASSIUM SORBATE
Learn More
Frequently Asked Questions
What is SODIUM BENZOATE used for in cosmetics?
SODIUM BENZOATE is primarily used for anticorrosive in cosmetic products. It also serves as fragrance, preservative. The ingredient is commonly found in various cosmetic and personal care products.
Which countries regulate SODIUM BENZOATE?
SODIUM BENZOATE is banned in UK. The ingredient is freely allowed in EU, JP, US.
Are there alternatives to SODIUM BENZOATE?
Due to regulatory restrictions on SODIUM BENZOATE, cosmetic manufacturers often use alternative ingredients with similar functions. For anticorrosive, 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.
Where can I find official regulation information about SODIUM BENZOATE?
Official information about SODIUM BENZOATE regulations can be found on government websites: EU CosIng database, US FDA Cosmetics page, Japan MHLW cosmetics standards, UK Government cosmetics guidance, and Korea MFDS. Always verify regulatory status with these official sources before making formulation decisions.
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.