---
kind: "section"
citation: "46 C.F.R. § 148.220"
title: "46"
number: "148.220"
heading: "Ammonium nitrate-phosphate fertilizers."
url: "https://uscodex.org/cfr/46/148.220"
---

# §148.220. Ammonium nitrate-phosphate fertilizers.

- (a) This section applies to the stowage and transportation of uniform, nonsegregating mixtures of nitrogen/phosphate or nitrogen/potash type fertilizers, or complete fertilizers of nitrogen/phosphate/potash type containing a maximum of 70 percent of ammonium nitrate and containing a maximum of 0.4 percent total added combustible material or containing a maximum of 45 percent ammonium nitrate with unrestricted combustible material.
- (b) **A fertilizer mixture described in paragraph (a) of this section is exempt if—**
  - (1) When tested in accordance with the trough test prescribed in Appendix 2, [Section 4](/cfr/46/4.md), of the IMSBC Code or in the UN Manual of Tests and Criteria, Part III, Subsection 38.2 (incorporated by reference, see [§ 148.8](/cfr/46/148.8.md)), it is found to be free from the risk of self-sustaining decomposition.
  - (2) [Reserved]
- (c) No fertilizer covered by this section may be transported in bulk if, when tested in accordance with the trough test prescribed in Appendix 2, [Section 4](/cfr/46/4.md), of the IMSBC Code or in the UN Manual of Tests and Criteria, Part III, Subsection 38.2 (incorporated by reference, see [§ 148.8](/cfr/46/148.8.md)), it has a self-sustaining decomposition rate that is greater than 0.25 meters per hour, or is liable to self-heat sufficient to initiate decomposition.
- (d) Fertilizers covered by this section must be stowed away from all sources of heat, and out of direct contact with a metal engine compartment boundary.
- (e) Bunkering or transferring of fuel may not be performed during loading and unloading of fertilizer covered by this section.
- (f) Fertilizer covered by this section must be segregated as prescribed in §§ [148.140](/cfr/46/148.140.md) and [148.220(d)](#d) of this part.

## Notes

### Authority

Authority: 33 U.S.C. 1602; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; 46 U.S.C. 3306, 5111; 49 U.S.C. 5103; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: 75 FR 64591, Oct. 19, 2010, unless otherwise noted.