HazMat Tool — substance information

5-tert-Butyl-2,4,6-trinitro-m-xylene or Musk xylene

HMT May 2026

UN / ID: UN 2956
Hazard class: 4.1
Packing group: III
ERG guide: ERG 149
Special provisions: SP 159
Source: 49 CFR §172 (2026/05)

Spot an error in this entry?

On this page

5-tert-Butyl-2,4,6-trinitro-m-xylene or Musk xylene

Emergency Response Guide No. 149

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

4.1
Flammable solids

(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.

159	This material must be protected from direct sunshine and kept in a cool, well-ventilated place away from sources of heat. Browse special provision 159

(8) Packing Authorizations (§173.***)

(8A) Exceptions	151	see 49 CFR §173.151
(8B) Non-bulk	223	see 49 CFR §173.223
(8C) Bulk	None

(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

12	see 49 CFR §176.84
25	see 49 CFR §176.84
40	see 49 CFR §176.84
127	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
UN 0130	Lead styphnate, wetted or Lead trinitroresorcinate, wetted with not less than 20 percent water or mixture of alcohol and water, by mass	1.1A
UN 0394	Trinitroresorcinol, wetted or Styphnic acid, wetted with not less than 20 percent water, or mixture of alcohol and water by mass	1.1D
UN 0219	Trinitroresorcinol or Styphnic acid, dry or wetted with less than 20 percent water, or mixture of alcohol and water, by mass	1.1D
UN 0388	Trinitrotoluene and Trinitrobenzene mixtures or TNT and trinitrobenzene mixtures or TNT and hexanitrostilbene mixtures or Trinitrotoluene and hexanitrostilnene mixtures	1.1D
UN 3364	Trinitrophenol (picric acid), wetted, with not less than 10 percent water by mass	4.1
UN 0154	Trinitrophenol or Picric acid, dry or wetted with less than 30 percent water, by mass	1.1D
UN 1356	Trinitrotoluene, wetted or TNT, wetted, with not less than 30 percent water by mass	4.1
UN 0215	Trinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass	1.1D
UN 1355	Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass	4.1
UN 3365	Trinitrochlorobenzene (picryl chloride), wetted, with not less than 10% water by mass	4.1
UN 3366	Trinitrotoluene (TNT), wetted, with not less than 10 percent water by mass	4.1
UN 0389	Trinitrotoluene mixtures containing Trinitrobenzene and Hexanitrostilbene or TNT mixtures containing trinitrobenzene and hexanitrostilbene	1.1D
UN 0209	Trinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass	1.1D
UN 0214	Trinitrobenzene, dry or wetted with less than 30 percent water, by mass	1.1D
UN 1354	Trinitrobenzene, wetted with not less than 30 percent water, by mass	4.1