HazMat Tool — substance information

Acetyl chloride

HMT May 2026
UN / ID
UN 1717
Hazard class
3
Packing group
II
ERG guide
ERG 155
Special provisions
SP A3, SP A7, SP IB1, SP N34, SP T8, SP TP2
Source
49 CFR §172 (2026/05)

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Acetyl chloride


Acetyl chloride (CH3COCl) is an acyl chloride derived from acetic acid (CH3COOH). It belongs to the class of organic compounds called acid halides. It is a colorless, corrosive, volatile liquid. Its formula is commonly abbreviated to AcCl. Wikipedia

Substance Data

Source: PubChem (HSDB, 19.11.2019)

CAS-Number

75-36-5

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 155

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

3
Flammable liquids

(4) Identification number Help

UN 1717

(5) Packing Group Help

II

(6) Labels Help

Flammable liquids (3) 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.
A3
A7
IB1
N34
T8
TP2

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

(8A) Exceptions150see 49 CFR §173.150
(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 only5 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.

Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.