HazMat Tool — substance information

Xylyl bromide, solid

HMT May 2026
UN / ID
UN 3417
Hazard class
6.1
Packing group
II
ERG guide
ERG 152
Special provisions
SP A3, SP A6, SP A7, SP IB8, SP IP2, SP IP4, SP N33, SP T3, more…
Source
49 CFR §172 (2026/05)

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Xylyl bromide, solid


Xylyl-bromide, also known as methylbenzyl bromide or T-stoff ('substance-T'), is any member or a mixture of organic chemical compounds with the molecular formula C6H4(CH3)(CH2Br). The mixture was formerly used as a tear gas and has an odor reminiscent of lilac. All members and the mixture are colourless liquids, although commercial or older samples appear yellowish. Wikipedia

Substance Data

Source: PubChem (HSDB, 04.12.2019)

CAS-Number

104-81-4

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 152

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

6.1
Poisonous Material

(4) Identification number Help

UN 3417

(5) Packing Group Help

II

(6) Labels Help

Poisonous liquids PG I Zone A (6.1)

(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.
A3
A6
A7
IB8
IP2
IP4
N33
T3
TP33

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

(8A) ExceptionsNone
(8B) Non-bulk340see 49 CFR §173.340
(8C) BulkNone

(9) Quantity Limits Help

(9A) Passenger aircraft/rail25 kg
(9B) Cargo aircraft only100 kg

(10) Vessel stowage Help

(10A) Location
(10B) Other

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.

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

  • §177.834 - General requirements
  • §177.835 - Class 1 materials
  • §177.837 - Class 3 materials
  • §177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
  • §177.839 - Class 8 (corrosive) materials
  • §177.840 - Class 2 (gases) materials
  • §177.841 - Division 6.1 and Division 2.3 materials
  • §177.842 - Class 7 (radioactive) material
  • §177.843 - Contamination of vehicles