HazMat Tool — substance information

Ammonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammonia

HMT 15 June 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 3318
Hazard class
2.3
Packing group
n/a (multiple — see tabs)
ERG guide
ERG 125
Special provisions
SP 4, SP N87, SP T50
Source
49 CFR §172 (15 June 2026)

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Ammonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammonia


Ammonia solution is a solution of ammonia in water. Alternatively, it is known as ammonia water, ammonium hydroxide, ammoniacal liquor, ammonia liquor, liquid ammonia, aqua ammonia, aqueous ammonia, or (inaccurately, nevertheless commonly referred to as) simply ammonia. It can be denoted by the symbols NH3(aq). Although the name ammonium hydroxide suggests a salt with the composition Wikipedia

Emergency Response Guide No. 125

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

2.3
Poisonous gas

(4) Identification number Help

UN 3318

(5) Packing Group Help

n/a

(6) Labels Help

Poisonous gas (2.3) Corrosive liquids (8)

(1) Symbols Help


This entry is signed with "I". The letter "I" identifies proper shipping names which are appropriate for describing materials in international transportation. An alternate proper shipping name may be selected when only domestic transportation is involved.

(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.
4
N87
T50

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

(8A) ExceptionsNone
(8B) Non-bulk304see 49 CFR §173.304
(8C) Bulk314, 315see 49 CFR §173.314, 315

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(10A) Location
(10B) Other

(3) Hazard Class

2.2
Non-toxic, non-flammable gases

(4) Identification number Help

UN 3318

(5) Packing Group Help

n/a

(6) Labels Help

Non-toxic, non-flammable gases (2.2)

(1) Symbols Help


This entry is signed with "D". The letter "D" identifies proper shipping names which are appropriate for describing materials for domestic transportation but may be inappropriate for international transportation under the provisions of international regulations (e.g., IMO, ICAO). An alternate proper shipping name may be selected when either domestic or international transportation is involved.

(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.
13
T50

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

(8A) ExceptionsNone
(8B) Non-bulk304see 49 CFR §173.304
(8C) Bulk314, 315see 49 CFR §173.314, 315

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(10A) Location
(10B) Other

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 n/a PG n/a
1ID
2Ammonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammoniaAmmonia solution, relative density less than 0.880 at 15 degrees C in water, with more than 50 percent ammonia
32.32.2
4UN 3318UN 3318
5 n/a n/a
62.3, 82.2
74, N87, T5013, T50
8ANoneNone
8B304304
8C314, 315314, 315
9AForbiddenForbidden
9BForbiddenForbidden
10ADD
10B40, 52, 5740, 52, 57

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.