Sodium Hydroxide E524
pH adjuster, processing aid — Primarily synthetic.
Sodium hydroxide (NaOH)
CAS: 1310-73-2
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.
? Did You Know?
Beyond food, Sodium Hydroxide is also used in cosmetics, medicine, industrial applications, household products. Its versatility makes it one of the most multi-purpose chemical compounds in everyday life.
In the EU, Sodium Hydroxide has a "quantum satis" authorization — Latin for "as much as needed." This means there's no specific maximum limit; manufacturers use only what's technologically necessary.
Detailed Regulatory Assessment
European Union (EFSA)
Used as processing aid; must be neutralized in final product. No free caustic remains in food.
Official EFSA LinkUnited States (FDA)
Widely used in food processing, especially for pretzels and Asian noodles.
Japan (MHLW)
Common in ramen and noodle production.
Acceptable Daily Intake (ADI)
International Standard (JECFA)
mg/kg body weight per day
European Standard (EFSA)
Natural Occurrence
This additive is not known to occur naturally in significant quantities.
Manufacturing
Produced by the electrolysis of sodium chloride (salt) solution using the chloralkali process. This produces sodium hydroxide, chlorine gas, and hydrogen gas. The sodium hydroxide is concentrated and purified for various grades including food grade.
Applications Beyond Food
pH adjuster in soaps (saponification), hair relaxers, chemical peels.
pH adjustment in pharmaceutical formulations.
Pulp and paper manufacturing, textiles, chemical production, petroleum refining, drain cleaners.
Drain cleaners (industrial grade), soap making, pretzels.