40 CFR § 721.11253 - Sulfuric acid, ammonium salt (1:?).

---
identifier: "/us/cfr/t40/s721.11253"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 721.11253 - Sulfuric acid, ammonium salt (1:?)."
title_number: 40
title_name: "Protection of Environment"
section_number: "721.11253"
section_name: "Sulfuric acid, ammonium salt (1:?)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "R"
subchapter_name: "TOXIC SUBSTANCES CONTROL ACT"
part_number: "721"
part_name: "SIGNIFICANT NEW USES OF CHEMICAL SUBSTANCES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 2604, 2607, and 2625(c)."
regulatory_source: "49 FR 35018, Sept. 5, 1984, unless otherwise noted."
cfr_part: "721"
---


# 721.11253 Sulfuric acid, ammonium salt (1:?).

(a) *Chemical substance and significant new uses subject to reporting.* (1) The chemical substance identified as sulfuric acid, ammonium salt (1:?) (PMN P-18-73, CAS No. 10043-02-4) is subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section.

(2) The significant new uses are:

(i) *Industrial, commercial, and consumer activities.* Requirements as specified in § 721.80(j). It is a significant new use to use the substance other than a Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) inert ingredient, an anti-scalant, a chlorine stabilizer, or the additional confidential uses described in the PMN.

(ii) [Reserved]

(b) *Specific requirements.* The provisions of subpart A of this part apply to this section except as modified by this paragraph (b).

(1) *Recordkeeping.* Recordkeeping requirements as specified in § 721.125(a) thru (c) and (i), are applicable to manufacturers, including importers, and processors of this substance.

(2) *Limitations or revocation of certain notification requirements.* The provisions of § 721.185 apply to this section.

(3) *Determining whether a specific use is subject to this section.* The provisions of § 721.1725(b)(1) apply to paragraph (a)(2)(iii) of this section.

[85 FR 15957, Mar. 20, 2020]