---
kind: "section"
citation: "49 C.F.R. § 173.187"
title: "49"
number: "173.187"
heading: "Pyrophoric solids, metals or alloys, n.o.s."
url: "https://uscodex.org/cfr/49/173.187"
---

# §173.187. Pyrophoric solids, metals or alloys, n.o.s.


Packagings for pyrophoric solids, metals, or alloys, n.o.s. must conform to the requirements of [part 178](/cfr/49/part178.md) of this subchapter at the packing group performance level specified in the [§ 172.101](/cfr/49/172.101.md) Table. These materials must be packaged as follows:

- (a) In steel, aluminum or other metal boxes (4A, 4B or 4N) and contain no more than 15 kg (33 pounds) each.
- (b) In wooden boxes (4C1, 4C2, 4D, or 4F) with inner metal receptacles that have threaded closures or alternate closures physically held in place by a means capable of preventing back-off or loosening of the closure due to conditions normally incident to transportation (e.g., impact, vibration, etc.). Each inner metal receptacle must not contain more than 15 kg (33 pounds).
- (c) In fiberboard boxes (4G) with inner metal receptacles that have threaded closures or alternate closures physically held in place by a means capable of preventing back-off or loosening of the closure due to conditions normally incident to transportation (e.g., impact, vibration, etc.). Each inner metal receptacle must not contain more than 7.5 kg (17 pounds).
- (d) In steel, aluminum or other metal drums (1A1, 1A2, 1B1, 1B2, 1N1 or 1N2) with a gross mass not exceeding 150 kg (331 pounds) per drum.
- (e) In plywood drums (1D) with inner metal receptacles that have threaded closures or alternate closures physically held in place by a means capable of preventing back-off or loosening of the closure due to conditions normally incident to transportation (e.g., impact, vibration, etc.). Each inner metal receptacle must not contain more than 15 kg (33 pounds).
- (f) In fiberboard drums (1G) with inner metal receptacles that have threaded closures or alternate closures physically held in place by a means capable of preventing back-off or loosening of the closure due to conditions normally incident to transportation (e.g., impact, vibration, etc.) Each inner metal receptacle must not contain more than 15 kg (33 pounds).
- (g) **In specification cylinders, as prescribed for any compressed gas, except for Specifications 8 and 3HT.**

## Notes

### Amendments

[71 FR 78632, Dec. 29, 2006, as amended at 78 FR 1088, Jan. 7, 2013; 87 FR 44994, July 26, 2022]

### Source

Source: Amdt. 173-224, 55 FR 52643, Dec. 21, 1990, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and 1.97.

### Amendments

[71 FR 78632, Dec. 29, 2006, as amended at 78 FR 1088, Jan. 7, 2013; 87 FR 44994, July 26, 2022]