---
kind: "section"
citation: "40 C.F.R. § 180.1280"
title: "40"
number: "180.1280"
heading: "Poly(hexamethylenebiguanide) hydrochloride (PHMB); exemption from the requirement of a tolerance."
url: "https://uscodex.org/cfr/40/180.1280"
---

# §180.1280. Poly(hexamethylenebiguanide) hydrochloride (PHMB); exemption from the requirement of a tolerance.


Poly(hexamethylenebiguanide) hydrochloride (PHMB)(CAS Reg. No. 32289-58-0) is exempt from the requirement of a tolerance for residues of the antimicrobial in or on all food commodities when the residues are the result of the lawful application of a food contact surface sanitizer containing PHMB at 550 parts per million (ppm).


## Notes

### Amendments

[73 FR 1517, Jan. 9, 2008]

### Authority

Authority: 21 U.S.C. 321(q), 346a and 371.

### Source

Source: 36 FR 22540, Nov. 25, 1971, unless otherwise noted.

### Amendments

[73 FR 1517, Jan. 9, 2008]