HazMat Tool — substance information

Titanium trichloride, pyrophoric or Titanium trichloride mixtures, pyrophoric

HMT May 2026

UN / ID: UN 2441
Hazard class: 4.2
Packing group: I
ERG guide: ERG 135
Special provisions: SP N34, SP W31
Source: 49 CFR §172 (2026/05)

On this page

Titanium trichloride, pyrophoric or Titanium trichloride mixtures, pyrophoric

Emergency Response Guide No. 135

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

4.2
Spontaneously combustible 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.

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
W31	Non-bulk packagings must be hermetically sealed. Browse special provision W31

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	181	see 49 CFR §173.181
(8C) Bulk	244	see 49 CFR §173.244

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

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

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

Source: 49 CFR §176.84

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
NA 2845	Ethyl phosphonous dichloride, anhydrous pyrophoric liquid	6.1
UN 3394	Organometallic substance, liquid, pyrophoric, water-reactive	4.2
UN 3393	Organometallic substance, solid, pyrophoric, water-reactive	4.2
NA 2845	Methyl phosphonous dichloride, pyrophoric liquid	6.1
UN 1383	Pyrophoric metals, n.o.s., or Pyrophoric alloys, n.o.s	4.2
UN 1855	Calcium, pyrophoric or Calcium alloys, pyrophoric	4.2
UN 3392	Organometallic substance, liquid, pyrophoric	4.2
UN 3391	Organometallic substance, solid, pyrophoric	4.2
UN 3194	Pyrophoric liquid, inorganic, n.o.s	4.2
UN 2845	Pyrophoric liquids, organic, n.o.s	4.2
UN 3200	Pyrophoric solid, inorganic, n.o.s	4.2
UN 2846	Pyrophoric solids, organic, n.o.s	4.2
UN 1854	Barium alloys, pyrophoric	4.2
UN 0380	Articles, pyrophoric	1.2L