---
kind: "section"
citation: "40 C.F.R. § 180.1423"
title: "40"
number: "180.1423"
heading: "Calcium carbonate; exemption from the requirement of a tolerance."
url: "https://uscodex.org/cfr/40/180.1423"
---

# §180.1423. Calcium carbonate; exemption from the requirement of a tolerance.


An exemption from the requirement of a tolerance is established for residues of calcium carbonate in or on all raw agricultural commodities when used in accordance with label directions and good agricultural practices.


## Notes

### Amendments

[91 FR 53198, Aug. 17, 2026]

### Authority

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

### Source

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

### Amendments

[91 FR 53198, Aug. 17, 2026]