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Nitrogen, refrigerated liquid cryogenic liquid

Nitrogen is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. Although Carl Wilhelm Scheele and Henry Cavendish had independently done so at about the same time, Rutherford is generally accorded the credit because his work was published first. The name nitrogène was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790, when it was found that nitrogen was present in nitric acid and nitrates. Wikipedia

Substance Data

Source: TOXNET (HSDB, 23.01.2019)

CAS-Number

7727-37-9

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 120

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

(3) Hazard Class

2.2
Non-toxic, non-flammable gases

(4) Identification number

UN 1977

(5) Packing Group

n/a

(6) Labels

(7) Special Provisions (§172.102)

×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.

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. Browse special provision 345
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. Browse special provision 346
T75	see 49 CFR §172.102
TP5	For a portable tank used for the transport of flammable refrigerated liquefied gases or refrigerated liquefied oxygen, the maximum rate at which the portable tank may be filled must not exceed the liquid flow capacity of the primary pressure relief system rated at a pressure not exceeding 120 percent of the portable tank's design pressure. For portable tanks used for the transport of refrigerated liquefied helium and refrigerated liquefied atmospheric gas (except oxygen), the maximum rate at which the tank is filled must not exceed the liquid flow capacity of the pressure relief device rated at 130 percent of the portable tank's design pressure. Except for a portable tank containing refrigerated liquefied helium, a portable tank shall have an outage of at least two percent below the inlet of the pressure relief device or pressure control valve, under conditions of incipient opening, with the portable tank in a level attitude. No outage is required for helium. Browse special provision TP5

(8) Packing Authorizations (§173.***)

(8A) Exceptions	320	see 49 CFR §173.320
(8B) Non-bulk	316	see 49 CFR §173.316
(8C) Bulk	318	see 49 CFR §173.318

(9) Quantity Limits

(9A) Passenger aircraft/rail	50 kg
(9B) Cargo aircraft only	500 kg

(10) Vessel stowage

(10A) Location	D Stowage category “D” means the material must be stowed “on deck only” on a cargo vessel or on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers or one passenger per each 3 m of overall vessel length, but the material is prohibited on a passenger vessel in which the limiting number of passengers is exceeded. Source: 49 CFR §172.101(k)
(10B) Other	n/a

Segregation Chart for Load, Transport, Storage

In this table a statement is contained for each hazard class whether the loading, transport or storage with other hazard classes is allowed, is not permitted or is restricted. The table is based on U.S.-Code 49 CFR §177.848.

Hazard Class	8	7	6.1	5.2	5.1	4.3	4.2	4.1	3	2.3B	2.3A	2.2	2.1	1.6	1.5	1.4	1.3	1.1/1.2
1.1/1.2
1.3
1.4
1.5
1.6
2.1
2.2
2.3A
2.3B
3
4.1
4.2
4.3
5.1
5.2
6.1
7
8

	May not be loaded, transported, or stored together in the same transport vehicle or storage facility.
	Load, transport, storage together is not restricted.
	Load, transport, storage together is allowed under restrictions.

Substances with similar name

UN-Number	Name	Hazard Class
UN 1951	Argon, refrigerated liquid (cryogenic liquid)	2.2
NA 9202	Carbon monoxide, refrigerated liquid (cryogenic liquid)	2.3
UN 1038	Ethylene, refrigerated liquid (cryogenic liquid)	2.1
UN 3312	Gas, refrigerated liquid, flammable, n.o.s. (cryogenic liquid)	2.1
UN 3158	Gas, refrigerated liquid, n.o.s. (cryogenic liquid)	2.2
UN 1963	Helium, refrigerated liquid (cryogenic liquid)	2.2
UN 1970	Krypton, refrigerated liquid (cryogenic liquid)	2.2
UN 1972	Methane, refrigerated liquid (cryogenic liquid) or Natural gas, refrigerated liquid (cryogenic liquid), with high methane content)	2.1
UN 1913	Neon, refrigerated liquid (cryogenic liquid)	2.2