E529
Calcium oxide
What the research shows
Not enough
published research on this page yet
A white solid also called quicklime or burnt lime.1
- Vegan
- Vegetarian
- EU permitted
What expert reviews concluded
Expert panels that weigh all the research. Shown for context: the signal at the top does not count them.
-
UN and WHO food additive experts (JECFA), 1965
No daily limit needed (“ADI not specified”, JECFA’s term for very low toxicity).
Regulatory status
Checked Sep 2026-
United States Permitted FDA 21 CFR 184.1210
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European Union Permitted EUR-Lex Reg. (EC) 1333/2008
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United Kingdom Permitted FSA retained EU law
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Canada Permitted Health Canada · Other Accepted Uses
Status reflects the named register on the date checked. It is not a safety rating.
How we checkProducts
The 6 most-scanned of 45 products on Open Food Facts that list calcium oxide.
- Pappadums Plain Pattak's · 100 g 1 additive
- 8 Garlic & Coriander Poppadoms Sharwood's · 8 1 additive
- mini poppadoms Aldi · 85 g 1 additive
- Poppadums Marks & Spencer · 50 g 1 additive
- Poppadoms Bilash 2 additives
- popsdoms Sainsbury’s 1 additive
References
- 1Calcium oxide. Wikipedia. Accessed September 26, 2026. CC BY-SA 4.0.