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E341I — Monocalcium phosphate
Why it’s used
Monocalcium phosphate is the acid component most commonly paired with sodium bicarbonate in baking powder, where it reacts to leaven baked goods; it also functions as an anticaking agent, firming agent, and calcium fortifier.
Other names
Calcium biphosphate, Calcium dihydrogen phosphate, Monobasic calcium phosphate, MCP, Calcium phosphate, monobasic
Diet flags
Vegan, passesVegetarian, passes
Regulatory status
USA — Allowed
GRAS as a direct food substance under 21 CFR 182.1217 (calcium phosphate, monobasic), usable at good manufacturing practice levels. Source (2026-07-23)
EU — Restricted
Authorised under Regulation (EC) No 1333/2008, Annex II, as E 341(i) within the phosphates group (E 338–341, E 343, E 450–452), with maximum permitted levels defined by food category. Source (2026-07-23)
Regulatory status by region
FDA's GRAS listing sets no numeric usage cap beyond GMP, unlike the EU's per-category maximum permitted levels.
EFSA's 2019 re-evaluation set a group ADI of 40 mg/kg body weight/day (as phosphorus) for the phosphates family, and the EU applies explicit per-category maximum levels under Annex II, unlike the FDA's open GMP standard.
Found in these products
1 product in our database contains E341I.