HazMat Tool — substance information

Chloromethyl chloroformate

HMT May 2026
UN / ID
UN 2745
Hazard class
6.1
Packing group
II
ERG guide
ERG 157
Special provisions
SP IB2, SP T7, SP TP2, SP TP13
Source
49 CFR §172 (2026/05)

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Chloromethyl chloroformate


Chloromethyl chloroformate (CClO2CH2Cl), also known as palite gas, is a chemical compound and used for chemical warfare during World War I. German forces used a mixture of chloromethyl chloroformate and dichloromethyl chloroformate called "K-Stoff", while French and other Allied forces used it under name "Palite". It is a tearing agent designed to cause temporary blindness. It is a colorless liquid with a penetrating, irritating odor. Industrially, chloromethyl chloroformate is used to manufacture other chemicals. Wikipedia

Emergency Response Guide No. 157

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

6.1
Poisonous Material

(4) Identification number Help

UN 2745

(5) Packing Group Help

II

(6) Labels Help

Poisonous liquids PG I Zone A (6.1) Corrosive liquids (8)

(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.
IB2
T7
TP2
TP13

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

(8A) Exceptions153see 49 CFR §173.153
(8B) Non-bulk202see 49 CFR §173.202
(8C) Bulk243see 49 CFR §173.243

(9) Quantity Limits Help

(9A) Passenger aircraft/rail1 L
(9B) Cargo aircraft only30 L

(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