HazMat Tool — substance information

Metal hydrides, flammable, n.o.s

HMT May 2026
UN / ID
UN 3182
Hazard class
4.1
Packing group
II (multiple — see tabs)
ERG guide
ERG 170
Special provisions
SP A1, SP IB4, SP T3, SP TP33, SP W31, SP W40
Source
49 CFR §172 (2026/05)

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Metal hydrides, flammable, n.o.s

Emergency Response Guide No. 170

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

4.1
Flammable solids

(4) Identification number Help

UN 3182

(5) Packing Group Help

II

(6) Labels Help

Flammable solids (4.1)

(7) Special Provisions (§172.102) Help

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.
A1
IB4
T3
TP33
W31
W40

(8) Packing Authorizations (§173.***) Help

(8A) Exceptions151see 49 CFR §173.151
(8B) Non-bulk212see 49 CFR §173.212
(8C) Bulk240see 49 CFR §173.240

(9) Quantity Limits Help

(9A) Passenger aircraft/rail15 kg
(9B) Cargo aircraft only50 kg

(10) Vessel stowage Help

(10A) Location
(10B) Other n/a

(3) Hazard Class

4.1
Flammable solids

(4) Identification number Help

UN 3182

(5) Packing Group Help

III

(6) Labels Help

Flammable solids (4.1)

(7) Special Provisions (§172.102) Help

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.
A1
IB4
T1
TP33
W31

(8) Packing Authorizations (§173.***) Help

(8A) Exceptions151see 49 CFR §173.151
(8B) Non-bulk213see 49 CFR §173.213
(8C) Bulk240see 49 CFR §173.240

(9) Quantity Limits Help

(9A) Passenger aircraft/rail25 kg
(9B) Cargo aircraft only100 kg

(10) Vessel stowage Help

(10A) Location
(10B) Other n/a

Packing group comparison

Multiple packing groups apply to this entry. See assignment criteria in 49 CFR §173 Subpart D. Details are in the tabs above; differences are highlighted.

PG II PG III
1
2Metal hydrides, flammable, n.o.sMetal hydrides, flammable, n.o.s
34.14.1
4UN 3182UN 3182
5IIIII
64.14.1
7A1, IB4, T3, TP33, W31, W40A1, IB4, T1, TP33, W31
8A151151
8B212213
8C240240
9A15 kg25 kg
9B50 kg100 kg
10AEE
10B n/a n/a

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.