40 CFR § 725.420 - Recipient microorganisms.

---
identifier: "/us/cfr/t40/s725.420"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 725.420 - Recipient microorganisms."
title_number: 40
title_name: "Protection of Environment"
section_number: "725.420"
section_name: "Recipient microorganisms."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "R"
subchapter_name: "TOXIC SUBSTANCES CONTROL ACT"
part_number: "725"
part_name: "REPORTING REQUIREMENTS AND REVIEW PROCESSES FOR MICROORGANISMS"
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, 2613, and 2625."
regulatory_source: "62 FR 17932, Apr. 11, 1997, unless otherwise noted."
cfr_part: "725"
---


# 725.420 Recipient microorganisms.

The following recipient microorganisms are eligible for either exemption under this subpart:

(a) *Acetobacter aceti.*

(b) *Aspergillus niger.*

(c) *Aspergillus oryzae.*

(d) *Bacillus licheniformis.*

(e) *Bacillus subtilis.*

(f) *Clostridium acetobutylicum.*

(g) *Escherichia coli* K-12.

(h) *Penicillium roqueforti.*

(i) *Saccharomyces cerevisiae.*

(j) *Saccharomyces uvarum.*

(k) *Trichoderma reesei* strain QM6a and its derivatives used only in submerged standard industrial fermentation operations as defined at 40 CFR 725.3.

(l) *Bacillus amyloliquefaciens* subsp. *amyloliquefaciens.*

[62 FR 17932, Apr. 11, 1997, as amended at 85 FR 13772, Mar. 10, 2020]