Shipping Classification
Nitrogen, refrigerated liquid cryogenic liquid
What this means
Nitrogen, refrigerated liquid cryogenic liquid appears on the federal Hazardous Materials Table (49 CFR §172.101), the table that governs how a material must be classified, packaged, and labeled for transport.
Hazard class / division
Class 2.2
UN / NA identification number
UN1977
Packing group
N/A
Label codes
2.2
Packaging — exceptions
320
Packaging — non-bulk
316
Packaging — bulk
318
Passenger aircraft / rail limit
50 kg
Cargo aircraft only limit
500 kg
Vessel stowage location
D
Vessel stowage — other
None
Special provisions (§172.102)
345 — “Nitrogen, refrigerated liquid (cryogenic liquid), UN1977” transported in open cryogenic receptacles with a maximum capacity of 1 L are not subject to the requirements of this subchapter. The receptacles must be constructed with glass double walls having the space between the walls vacuum insulated and each receptacle must be transported in an outer packaging with sufficient cushioning and absorbent materials to protect the receptacle from damage.
346 — “Nitrogen, refrigerated liquid (cryogenic liquid), UN1977” transported in accordance with the requirements for open cryogenic receptacles in § 173.320 and this special provision are not subject to any other requirements of this subchapter. The receptacle must contain no hazardous materials other than the liquid nitrogen which must be fully absorbed in a porous material in the receptacle.
T75 (see §172.102 or related section for full text)
TP5 (see §172.102 or related section for full text)
Packaging citations reference sections of 49 CFR Part 173 not expanded here. View the full official table on eCFR.gov.
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Source: Hazardous Materials Table (49 CFR §172.101) and Special Provisions (49 CFR §172.102), current as retrieved from eCFR.gov. View official table.