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

Aluminum phosphide

HMT 15 June 2026

UN / ID: UN 1397
Hazard class: 4.3
Packing group: I (multiple — see tabs)
ERG guide: ERG 139
Special provisions: SP A8, SP A19, SP N40, SP W31
Source: 49 CFR §172 (15 June 2026)

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Aluminum phosphide

Substance Data

Source: PubChem (HSDB, 07.12.2019)

CAS-Number

20859-73-8

Flash Point

—

Boiling Point

—

Emergency Response Guide No. 139

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

Packing group I
Packing group II

(3) Hazard class

4.3
Dangerous when wet materials

(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.

A8	For combination packagings, if glass inner packagings (including ampoules) are used, they must be packed with cushioning material in tightly closed metal receptacles before packing in outer packagings. Browse special provision A8
A19	Combination packagings consisting of outer fiber drums or plywood drums, with inner plastic packagings, are not authorized for transportation by aircraft. Browse special provision A19
N40	This material is not authorized in the following packagings: a. A combination packaging consisting of a 4G fiberboard box with inner receptacles of glass or earthenware; b. A single packaging of a 4C2 sift-proof, natural wood box; or c. A composite packaging 6PG2 (glass, porcelain or stoneware receptacles within a fiberboard box). Browse special provision N40
W31	Non-bulk packagings must be hermetically sealed. Browse special provision W31

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	211	see 49 CFR §173.211
(8C) Bulk	242	see 49 CFR §173.242

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	15 kg

(10) Vessel stowage

(10A) Location

Stowage category “E” means the material may be stowed “on deck” or “under deck” 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 is prohibited from carriage on a passenger vessel in which the limiting number of passengers is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

13	see 49 CFR §176.84
40	see 49 CFR §176.84
52	see 49 CFR §176.84
85	see 49 CFR §176.84
148	see 49 CFR §176.84

Source: 49 CFR §176.84

(3) Hazard class

4.3
Dangerous when wet materials

(4) Identification number

UN 1419

(5) Packing Group

Comparison View of PG

(6) Labels

Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102)

A19	Combination packagings consisting of outer fiber drums or plywood drums, with inner plastic packagings, are not authorized for transportation by aircraft. Browse special provision A19
N34	Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material. Browse special provision N34
N40	This material is not authorized in the following packagings: a. A combination packaging consisting of a 4G fiberboard box with inner receptacles of glass or earthenware; b. A single packaging of a 4C2 sift-proof, natural wood box; or c. A composite packaging 6PG2 (glass, porcelain or stoneware receptacles within a fiberboard box). Browse special provision N40
W31	Non-bulk packagings must be hermetically sealed. Browse special provision W31

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	211	see 49 CFR §173.211
(8C) Bulk	242	see 49 CFR §173.242

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	15 kg

(10) Vessel stowage

(10A) Location

Source: 49 CFR §172.101(k)

(10B) Other

13	see 49 CFR §176.84
40	see 49 CFR §176.84
52	see 49 CFR §176.84
85	see 49 CFR §176.84
148	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 I	PG I
1
2	Aluminum phosphide	Magnesium aluminum phosphide
3	4.3	4.3
4	UN 1397	UN 1419
5	I	I
6	4.3, 6.1	4.3, 6.1
7	A8, A19, N40, W31	A19, N34, N40, W31
8A	None	None
8B	211	211
8C	242	242
9A	Forbidden	Forbidden
9B	15 kg	15 kg
10A	E	E
10B	13, 40, 52, 85, 148	13, 40, 52, 85, 148

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 1869	Magnesium or Magnesium alloys with more than 50 percent magnesium in pellets, turnings or ribbons	4.1
UN 2950	Magnesium granules, coated, particle size not less than 149 microns	4.3
UN 1459	Chlorate and magnesium chloride mixture solid	5.1
UN 3407	Chlorate and magnesium chloride mixture solution	5.1
UN 1418	Magnesium, powder or Magnesium alloys, powder	4.3
UN 1928	Methyl magnesium bromide, in ethyl ether	4.3
	Magnesium dross, wet or hot	Forbidden
UN 2011	Magnesium phosphide	4.3
UN 1622	Magnesium arsenate	6.1
UN 1473	Magnesium bromate	5.1
UN 2723	Magnesium chlorate	5.1
UN 2004	Magnesium diamide	4.2
UN 2853	Magnesium fluorosilicate	6.1
UN 2010	Magnesium hydride	4.3
UN 1474	Magnesium nitrate	5.1