# 21 C.F.R. § 172.350 (2026): Fumaric acid and salts of fumaric acid

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T21_P172_S172_350

## Section

- **Citation:** 21 C.F.R. § 172.350 (2026)
- **Heading:** Fumaric acid and salts of fumaric acid
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 21 CFR: Food and Drugs / Chapter I: FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES / Part 172: FOOD ADDITIVES PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION / Subpart D: Special Dietary and Nutritional Additives / § 172.350: § 172.350   Fumaric acid and salts of fumaric acid.

## Text

Fumaric acid and its calcium, ferrous, magnesium, potassium, and sodium salts may be safely used in food in accordance with the following prescribed conditions:
(a) The additives meet the following specifications:
(1) Fumaric acid contains a minimum of 99.5 percent by weight of fumaric acid, calculated on the anhydrous basis.
(2) The calcium, magnesium, potassium, and sodium salts contain a minimum of 99 percent by weight of the respective salt, calculated on the anhydrous basis. Ferrous fumarate contains a minimum of 31.3 percent total iron and not more than 2 percent ferric iron.
(b) With the exception of ferrous fumarate, fumaric acid and the named salts are used singly or in combination in food at a level not in excess of the amount reasonably required to accomplish the intended effect.
(c) Ferrous fumarate is used as a source of iron in foods for special dietary use, when the use is consistent with good nutrition practice.

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T21_P172_S172_350. Check the current official text before relying on it. Not legal advice.