Propanediol
1,3-Propanediol has limited specific food-additive review compared to propylene glycol. It is more commonly used in personal care products.
What it is
1,3-Propanediol, a colorless viscous liquid produced by fermentation of corn sugar; used as a humectant and solvent. Distinct from propylene glycol (1,2-propanediol).
Humectant, solvent, and carrier for flavors and colors.
Why it's flagged
- 1,3-propanediol has limited specific food-additive review (more common in cosmetics)
- Related propylene glycol (1,2-propanediol, E1520) has EFSA ADI 25 mg/kg bw/day
What regulators actually say
"Propylene glycol (1,2-propanediol)... is generally recognized as safe when used in accordance with good manufacturing practice."
"An ADI of 25 mg/kg bw/day was established for propylene glycol."
Regulatory status
United States — FDA
1,3-Propanediol is not specifically listed as a GRAS food substance; propylene glycol (1,2-propanediol) is GRAS under 21 CFR 184.1666.
European Union — EFSA
Propylene glycol (E1520) approved with an ADI of 25 mg/kg bw/day; 1,3-propanediol not generally listed as a food additive.
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