Benzoic Acid E210
organic acid — Primarily synthetic.
Benzenecarboxylic acid
CAS: 65-85-0
Factual Regulatory Reference
This database provides factual regulatory information compiled from official government sources. It does not constitute medical, nutritional, or safety advice. Regulatory status varies by country and is subject to change. Always refer to your local regulatory authority for the most current information.
What Is Benzoic Acid?
Benzoic acid (E210) is a naturally occurring preservative found in small quantities in many fruits and spices, including cranberries, prunes, and cloves, but commercially produced through chemical oxidation of toluene. It is effective against yeasts and molds in acidic foods (pH below 4.5) and is widely used in carbonated beverages, fruit juices, jams, pickles, and certain condiments. Benzoic acid and its salts — sodium benzoate (E211), potassium benzoate (E212), and calcium benzoate (E213) — are evaluated as a group by EFSA and JECFA with a combined ADI. When combined with vitamin C (ascorbic acid) in acidic beverages, benzoic acid can form trace amounts of benzene, a known carcinogen; this combination has been scrutinized and products reformulated by industry. EFSA established a group ADI of 5 mg/kg body weight per day for benzoic acid and its salts.
? Did You Know?
Benzoic Acid occurs naturally in Gum benzoin (natural resin) and Cranberries. Many people consume it daily without realizing it's also a listed food additive.
Beyond food, Benzoic Acid is also used in cosmetics, medicine, industrial applications. Its versatility makes it one of the most multi-purpose chemical compounds in everyday life.
To reach the Acceptable Daily Intake limit, a 60kg adult would need to consume approximately ~6 cans of soft drink (355ml at 150mg/L) in a single day. (This is a mathematical illustration, not a safety recommendation.)
Regulatory Analysis
The primary regulatory controversy surrounding benzoic acid (E210) is not the compound itself but the reaction it can undergo with ascorbic acid (vitamin C) in acidic, low-pH beverages under certain conditions of heat or light, producing trace amounts of benzene. The FDA issued guidance in 2006 following surveys showing detectable benzene in some beverages. EFSA and JECFA responded to this concern by maintaining the group ADI at 5 mg/kg body weight — set jointly in 2016 for benzoic acid and benzoates (E210-E213) — while acknowledging that benzene formation requires active formulation management. Regulators did not lower the ADI for benzoic acid itself because benzene formation is a reaction between two approved ingredients rather than an inherent property of either. Industry reformulated many combined ascorbic acid/benzoate products in response.
Detailed Regulatory Assessment
European Union (EFSA)
Maximum levels typically 150-500 mg/kg; concern about benzene formation when combined with ascorbic acid
United States (FDA)
Maximum usage 0.1%; FDA issued guidance on benzene formation in beverages in 2006
Japan (MHLW)
Use limited to caviar, margarine, soft drinks, syrup, soy sauce, and fruit paste in confectionery
Acceptable Daily Intake (ADI)
International Standard (JECFA)
mg/kg body weight per day
European Standard (EFSA)
Everyday Perspective
For a 60kg adult, this limit is roughly equivalent to consuming:
Natural Occurrence
An aromatic carboxylic acid that occurs naturally in many plants. First isolated from gum benzoin resin in the 16th century, hence its name. While naturally present in many fruits and spices, commercial benzoic acid is produced synthetically.
Manufacturing
Industrially produced by partial oxidation of toluene with oxygen in the presence of metal catalysts (typically cobalt or manganese compounds). Can also be produced by hydrolysis of benzotrichloride or through the decarboxylation of phthalic acid.
Applications Beyond Food
Used as a preservative in cosmetics and personal care products
Used as a preservative in liquid medicines; intermediate in drug synthesis
Used in the production of phenol, caprolactam, benzoyl chloride, and plasticizers