HazMat Tool — substance information

Hydrogen in a metal hydride storage system or Hydrogen in a metal hydride storage system contained in equipment or Hydrogen in a metal hydride storage system packed with equipment

HMT January 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 3468
Hazard class
2.1
Packing group
ERG guide
ERG 115
Special provisions
SP 167
Source
49 CFR §172 (January 2026)

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Hydrogen in a metal hydride storage system or Hydrogen in a metal hydride storage system contained in equipment or Hydrogen in a metal hydride storage system packed with equipment

Emergency Response Guide No. 115

Hazardous Materials Table

Source: 49 CFR §172 (January 2026)

(3) Hazard Class

2.1
Flammable gases

(4) Identification number Help

UN 3468

(5) Packing Group Help

n/a

(6) Labels Help

Flammable gases (2.1) Cargo Aircraft Only (Cargo Aircraft Only)

(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.
167

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

(8A) ExceptionsNone
(8B) Non-bulk311see 49 CFR §173.311
(8C) BulkNone

(9) Quantity Limits Help

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

(10) Vessel stowage Help

(10A) Location
(10B) Other 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.

Similar substances

UN / IDProper shipping nameHazard class
UN 3479Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing hydrogen in metal hydride2.1
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UN 3478Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing liquefied flammable gas2.1
UN 3477Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing corrosive substances8
UN 3473Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing flammable liquids3
UN 3476Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing water-reactive substances4.3
UN 3481Lithium ion batteries contained in equipment including lithium ion polymer batteries9
UN 3481Lithium ion batteries packed with equipment including lithium ion polymer batteries9
UN 3091Lithium metal batteries contained in equipment including lithium alloy batteries9
Battery, wet, filled with acid or alkali with vehicle or mechanical equipment containing an internal combustion engine, see Vehicle, etc. or Engines, internal combustion, etc
UN 3072Life-saving appliances, not self inflating containing dangerous goods as equipment9
UN 3091Lithium metal batteries packed with equipment including lithium alloy batteries9
UN 3171Battery-powered vehicle or Battery-powered equipment9