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Chloroacetic acid, solution

HMT 15 June 2026

UN / ID: UN 1750
Hazard class: 6.1
Packing group: II (multiple — see tabs)
ERG guide: ERG 153
Special provisions: SP A7, SP IB2, SP N34, SP T7, SP TP2
Source: 49 CFR §172 (15 June 2026)

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Chloroacetic acid, solution

Chloroacetic acid, industrially known as monochloroacetic acid (MCA), is a organochlorine compound and carboxylic acid with the formula ClCH2CO2H; it is the simplest of the chloroacetic acids. This colorless solid is a useful building block in organic synthesis Wikipedia

Substance Data

Source: PubChem (HSDB, 15.12.2019)

CAS-Number

79-11-8

Flash Point

—

Boiling Point

—

Emergency Response Guide No. 153

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

Packing group II
Packing group III
Packing group

(3) Hazard class

6.1
Poisonous Material

(4) Identification number

UN 1750

(5) Packing Group

Comparison View of PG

(6) Labels

(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.

Steel packagings must be corrosion-resistant or have protection against corrosion.

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IB2

_{Authorized IBCs:} Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1).
_{Additional Requirement:} Only liquids with a vapor pressure less than or equal to 110 kPa at 50 °C (1.1 bar at 122 °F), or 130 kPa at 55 °C (1.3 bar at 131 °F) are authorized.

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N34

Aluminum construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material.

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Minimum test pressure (bar)	4
Minimum shell thickness	§ 178.274(d)(2)
Pressure-relief requirements	Normal
Bottom opening requirements	§ 178.275(d)(3)

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TP2

a. The maximum degree of filling must not exceed the degree of filling determined by the following:
TP2a

Where:
t_r is the maximum mean bulk temperature during transport,
t_f is the temperature in degrees celsius of the liquid during filling, and
α is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (t_f) and the maximum mean bulk temperature during transportation (t_r) both in degrees celsius.
b. For liquids transported under ambient conditions α may be calculated using the formula:
TP2b

Where:
d₁₅ and d₅₀ are the densities (in units of mass per unit volume) of the liquid at 15 °C (59 °F) and 50 °C (122 °F), respectively.

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(8) Packing Authorizations (§173.***)

(8A) Exceptions	153	see 49 CFR §173.153
(8B) Non-bulk	202	see 49 CFR §173.202
(8C) Bulk	243	see 49 CFR §173.243

(9) Quantity Limits

(9A) Passenger aircraft/rail	1 L
(9B) Cargo aircraft only	30 L

(10) Vessel stowage

(10A) Location

Stowage category “C” means the material must be stowed “on deck only” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

40	see 49 CFR §176.84
53	see 49 CFR §176.84
58	see 49 CFR §176.84

Source: 49 CFR §176.84