40 CFR § 721.4080 - MNNG (N-methyl-N′-nitro-N-nitrosoguanidine).
---
identifier: "/us/cfr/t40/s721.4080"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 721.4080 - MNNG (N-methyl-N′-nitro-N-nitrosoguanidine)."
title_number: 40
title_name: "Protection of Environment"
section_number: "721.4080"
section_name: "MNNG (N-methyl-N′-nitro-N-nitrosoguanidine)."
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: "2026-03-24"
last_updated: "2026-03-24"
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"
---
# 721.4080 MNNG (N-methyl-N′-nitro-N-nitrosoguanidine).
(a) *Chemical substance and significant new use subject to reporting.* (1) The chemical substance MNNG (N-methyl-N′-nitro-N-nitrosoguanidine) (CAS No. 70-25-7) is subject to reporting under this section for the significant new use described in paragraph (a)(2) of this section.
(2) The significant new use is: Manufacture, import, or processing of 10,000 pounds or more per year per facility for any use.
(b) *Specific requirements.* The provisions of subpart A of this part apply to this section except as modified by this paragraph.
(1) *Recordkeeping.* The following recordkeeping requirements are applicable to manufacturers, importers, and processors of this substance, as specified in § 721.125 (a), (b), and (c).
(2) [Reserved]
[58 FR 63517, Dec. 1, 1993]