Ascorbyl stearate E305
vitamin C ester — Primarily synthetic.
L-Ascorbyl stearate
CAS: 25395-66-8
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 Ascorbyl stearate?
Ascorbyl stearate is a fat-soluble ester of ascorbic acid and stearic acid, functioning as a lipid antioxidant in oils, fats, and fatty food products. It protects against oxidative rancidity by donating hydrogen atoms to free radicals in lipid phases. JECFA set a group ADI of 1.25 mg/kg body weight (combined with ascorbyl palmitate, E304). EFSA reviewed it in 2015 as part of the ascorbic acid group evaluation. It is less commonly used than ascorbyl palmitate due to similar function with lower availability.
? Did You Know?
In the EU, Ascorbyl stearate 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)
Permitted in specific categories
United States (FDA)
Regulated as a direct food additive under FDA CFR titles.
Japan (MHLW)
Compliant with Japanese food sanitation law.
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
This additive is not known to occur naturally in significant quantities.
Manufacturing
Industrially produced.