Ammonium nitrite

Ammonium nitrite, NH4NO2, is the ammonium salt of nitrous acid. It is not used in pure isolated form since it is highly unstable and decomposes into water and nitrogen, even at room temperature. Wikipedia

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

(3) Hazard Class

(4) Identification number Help


(5) Packing Group Help


(6) Labels Help


(7) Special Provisions (§172.102) Help

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

(8A) Exceptions n/asee 49 CFR §173. n/a
(8B) Non-bulk n/asee 49 CFR §173. n/a
(8C) Bulk n/asee 49 CFR §173. n/a

(9) Quantity Limits Help

(9A) Passenger aircraft/rail n/a
(9B) Cargo aircraft only n/a

(10) Vessel stowage Help

(10A) Location
(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.

Substances with similar name

UN-NumberNameHazard Class
Ammonium bifluoride solution, see Ammonium hydrogen difluoride, solution
UN 1439Ammonium dichromate5.1
UN 1843Ammonium dinitro-o-cresolate, solid6.1
UN 2854Ammonium fluorosilicate6.1
Ammonium fulminateForbidden
UN 1727Ammonium hydrogendifluoride, solid8
Ammonium hydrosulfide, solution, see Ammonium sulfide solution
UN 2426Ammonium nitrate, liquid (hot concentrated solution)5.1
UN 0222Ammonium nitrate, with more than 0.2 percent combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance1.1D
UN 1942Ammonium nitrate, with not more than 0.2% combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance5.1
NA 0331Ammonium nitrate-fuel oil mixture containing only prilled ammonium nitrate and fuel oil1.5D
UN 2067Ammonium nitrate based fertilizer5.1
UN 3375Ammonium nitrate emulsion or Ammonium nitrate suspension or Ammonium nitrate gel, intermediate for blasting explosives5.1
UN 0402Ammonium perchlorate1.1D
UN 1310Ammonium picrate, wetted with not less than 10 percent water, by mass4.1
UN 2818Ammonium polysulfide, solution8
Di-(beta-nitroxyethyl) ammonium nitrateForbidden
UN 2687Dicyclohexylammonium nitrite4.1
UN 1630Mercury ammonium chloride6.1
UN 2863Sodium ammonium vanadate6.1
Tetraethylammonium perchlorate (dry)Forbidden
UN 1835Tetramethylammonium hydroxide solution8
UN 1512Zinc ammonium nitrite5.1