21 CFR § 186.1093 - Sulfamic acid.

---
identifier: "/us/cfr/t21/s186.1093"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 186.1093 - Sulfamic acid."
title_number: 21
title_name: "Food and Drugs"
section_number: "186.1093"
section_name: "Sulfamic acid."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "186"
part_name: "INDIRECT FOOD SUBSTANCES AFFIRMED AS GENERALLY RECOGNIZED AS SAFE"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 342, 348, 371."
regulatory_source: "42 FR 14658, Mar. 15, 1977, unless otherwise noted."
cfr_part: "186"
---


# 186.1093 Sulfamic acid.

(a) Sulfamic acid (H<sub>3</sub>NO<sub>3</sub>S, CAS Reg. No. 5329-14-6) is a white crystalline solid manufactured from urea, sulfur trioxide, and sulfuric acid. It is soluble and highly ionized in water.

(b) In accordance with § 186.1(b)(1), the ingredient is used as an indirect food ingredient with no limitations other than current good manufacturing practice. The affirmation of this ingredient as generally recognized as safe (GRAS) as an indirect human food ingredient is based upon the current good manufacturing practice of using this ingredient in the manufacture of paper and paperboard that contact food.

(c) Prior sanctions for this ingredient different from the uses established in this section do not exist or have been waived.

[47 FR 29954, July 9, 1982]