HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

Dimethylamine, anhydrous

HMT 15 June 2026

UN / ID: UN 1032
Hazard class: 2.1
Packing group: — (multiple — see tabs)
ERG guide: ERG 118
Special provisions: SP N87, SP T50
Source: 49 CFR §172 (15 June 2026)

Spot an error in this entry?

On this page

Dimethylamine, anhydrous

Dimethylamine is an organic compound with the formula (CH3)2NH. This secondary amine is a colorless, flammable gas with an ammonia-like odor. Dimethylamine is commonly encountered commercially as a solution in water at concentrations up to around 40%. An estimated 271,000 tons were produced in 2005 Wikipedia

Substance Data

Source: PubChem (HSDB, 15.12.2019)

CAS-Number

124-40-3

Flash Point

—

Boiling Point

—

Emergency Response Guide No. 118

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

Packing group
Packing group
Packing group

(3) Hazard class

2.1
Flammable gases

(4) Identification number

UN 1032

(5) Packing Group

—

Comparison View of PG

(6) Labels

Flammable gases (2.1)

Cargo Aircraft Only (Cargo Aircraft Only)

(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.

N87	The use of copper valves on UN pressure receptacles is prohibited. Browse special provision N87
T50	When portable tank instruction T50 is indicated in Column (7) of the § 172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of § 173.313 of this subchapter. Browse special provision T50

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	304	see 49 CFR §173.304
(8C) Bulk	314, 315	see 49 CFR §173.314, 315

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	150 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

40	see 49 CFR §176.84
52	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard class

2.1
Flammable gases

(4) Identification number

UN 1061

(5) Packing Group

—

Comparison View of PG

(6) Labels

Flammable gases (2.1)

Cargo Aircraft Only (Cargo Aircraft Only)

(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.

N87	The use of copper valves on UN pressure receptacles is prohibited. Browse special provision N87
T50	When portable tank instruction T50 is indicated in Column (7) of the § 172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of § 173.313 of this subchapter. Browse special provision T50

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	304	see 49 CFR §173.304
(8C) Bulk	314, 315	see 49 CFR §173.314, 315

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	150 kg

(10) Vessel stowage

(10A) Location

B

Stowage category “B” means

(i) The material may be stowed “on deck” or “under deck” on a cargo vessel and 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; and
(ii) “On deck only” on passenger vessels in which the number of passengers specified in paragraph (k)(2)(i) of this section is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84
52	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard class

2.1
Flammable gases

(4) Identification number

UN 1083

(5) Packing Group

—

Comparison View of PG

(6) Labels

Flammable gases (2.1)

Cargo Aircraft Only (Cargo Aircraft Only)

(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.

N87	The use of copper valves on UN pressure receptacles is prohibited. Browse special provision N87
T50	When portable tank instruction T50 is indicated in Column (7) of the § 172.101 Hazardous Materials Table, the applicable liquefied compressed gas and chemical under pressure descriptions are authorized to be transported in portable tanks in accordance with the requirements of § 173.313 of this subchapter. Browse special provision T50

(8) Packing Authorizations (§173.***)

(8A) Exceptions	306	see 49 CFR §173.306
(8B) Non-bulk	304	see 49 CFR §173.304
(8C) Bulk	314, 315	see 49 CFR §173.314, 315

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	150 kg

(10) Vessel stowage

(10A) Location

B

Stowage category “B” means

(i) The material may be stowed “on deck” or “under deck” on a cargo vessel and 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; and
(ii) “On deck only” on passenger vessels in which the number of passengers specified in paragraph (k)(2)(i) of this section is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84
52	see 49 CFR §176.84

Source: 49 CFR §176.84

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 —	PG —	PG —
1
2	Dimethylamine, anhydrous	Methylamine, anhydrous	Trimethylamine, anhydrous
3	2.1	2.1	2.1
4	UN 1032	UN 1061	UN 1083
5	—	—	—
6	2.1	2.1	2.1
7	N87, T50	N87, T50	N87, T50
8A	None	306	306
8B	304	304	304
8C	314, 315	314, 315	314, 315
9A	Forbidden	Forbidden	Forbidden
9B	150 kg	150 kg	150 kg
10A	D	B	B
10B	40, 52	40, 52	40, 52

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.

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

	Must not be loaded, transported, or stored together in the same vehicle or facility.
	May be loaded, transported, or stored together.
	May be loaded, transported, or stored together only with restrictions.

Similar substances

UN / ID	Proper shipping name	Hazard class
UN 0072	Cyclotrimethylenetrinitramine, wetted or Cyclonite, wetted or Hexogen, wetted or RDX, wetted with not less than 15 percent water by mass	1.1D
UN 1297	Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass	3
UN 0483	Cyclotrimethylenetrinitramine, desensitized or Cyclonite, desensitized or Hexogen, desensitized or RDX, desensitized	1.1D
	2,4,6-Trinitrophenyl trimethylol methyl nitramine trinitrate (dry)	Forbidden
	Cyclotrimethylenenitramine and octogen, mixtures, wetted or desensitized see RDX and HMX mixtures, wetted or desensitized, etc
	Cyclotrimethylenetrinitramine and cyclotetramethylenetetranitramine mixtures, wetted or desensitized see RDX and HMX mixtures, wetted or desensitized etc
	Cyclotrimethylenetrinitramine and HMX mixtures, wetted or desensitized see RDX and HMX mixtures, wetted or desensitized etc
	Methyl trimethylol methane trinitrate	Forbidden
	Trimethylene glycol diperchlorate	Forbidden
	Trimethylol nitromethane trinitrate	Forbidden