E1517 · Glyceryl diacetate (diacetin)
We haven’t recorded a regulator assessment for Glyceryl diacetate (diacetin) yet. The information below comes from our ingredient database; a verdict will appear here once EFSA, FDA or WHO positions are added.
What is E1517?
Glyceryl diacetate (diacetin) is an ester of glycerol and acetic acid, used as a solvent, carrier, and plasticizer in flavorings, fragrances, and pharmaceutical tablet coatings. It helps dissolve and evenly distribute flavor compounds in food products and is also used as an excipient to improve tablet texture and swallowability. It is generally recognized as safe within its regulated use levels.
Also appears on labels as: Glyceryl diacetate (diacetin), Glyceryl diacetate, Diacetin, Glycerol diacetate, Diacetyl glycerol, E1517, E 1517, E-1517, Acetylated glycerol, Diacetin glycerol ester, Glycerol diacetate ester, INS 1517.
What the evidence says
- Generally recognized as safe at typical levels used as a flavor carrier or pharmaceutical excipient.
- Limited independent toxicological data exist compared to more widely studied additives; used mainly in small carrier quantities rather than as a direct food ingredient.
Frequently asked questions
Is E1517 safe?
Our overall verdict for E1517 (Glyceryl diacetate (diacetin)) is “Not yet rated”, based on the most cautious of the major regulators’ positions — no regulator assessment is recorded in our database yet.
Is E1517 vegan, halal or gluten-free?
According to our ingredient data for Glyceryl diacetate (diacetin) — vegan: yes, vegetarian: yes, halal: yes, kosher: yes, gluten-free: yes, dairy-free: yes. Manufacturing sources can vary between products; check the label if it matters to you.
What is E1517 and why is it used?
Glyceryl diacetate (diacetin) is an ester of glycerol and acetic acid, used as a solvent, carrier, and plasticizer in flavorings, fragrances, and pharmaceutical tablet coatings. It helps dissolve and evenly distribute flavor compounds in food products and is also used as an excipient to improve tablet texture and swallowability. It is generally recognized as safe within its regulated use levels.
Does E1517 contain allergens?
No known allergens are recorded for Glyceryl diacetate (diacetin).
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This page summarises publicly available regulatory assessments and research. It is general information, not medical advice. Sources: EFSA, FDA, WHO and the studies linked above.