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Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass

HMT 15 June 2026

UN / ID: UN 2790
Hazard class: 8
Packing group: II (multiple — see tabs)
ERG guide: ERG 153
Special provisions: SP 148 SP A3 SP A7 SP A10 SP B2 SP IB2 SP T7 SP TP2
Source: 49 CFR §172 (15 June 2026)

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Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass

Acetic acid , systematically named ethanoic acid , is an acidic, colourless liquid and organic compound with the chemical formula CH3COOH (also written as CH3CO2H, C2H4O2, or HC2H3O2). Acetic acid is the active component of vinegar. Historically, vinegar was produced from the third millennium BCE, making acetic acid likely the first acid to be produced in large quantities. Acetic acid is the second simplest carboxylic acid (after formic acid) Wikipedia

Substance Data

Source: PubChem (HSDB, 21.10.2026)

CAS-Number

64-19-7

Flash Point

39 ° C

Boiling Point

117.9 ° C

Emergency Response Guide No. 153

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

Packing group II
Packing group III

(3) Hazard class

8
Corrosive liquids

(4) Identification number

UN 2790

(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.

148

For domestic transportation, this entry directs to § 173.66 of this subchapter for:
a. The standards for transporting a single bulk hazardous material for blasting by cargo tank motor vehicles (CTMV); and
b. The standards for CTMVs capable of transporting multiple hazardous materials for blasting in bulk and non-bulk packagings (i.e., a multipurpose bulk truck). Note: “UN3375, Ammonium nitrate emulsion” and “UN0332, Explosive, blasting, type E or Agent blasting, type E” are subject to the United Nations (UN) Test Series 8(d) (UN/SCETDG/55/INF.27) (IBR, see § 171.7 of this subchapter), otherwise known as the Vented Pipe Test (VPT).

Browse special provision 148

For combination packagings, if glass inner packagings (including ampoules) are used, they must be packed with absorbent material in tightly closed rigid and leakproof receptacles before packing in outer packagings.

Browse special provision A3

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

Browse special provision A7

A10

When aluminum or aluminum alloy construction materials are used, they must be resistant to corrosion.

Browse special provision A10

MC 300, MC 301, MC 302, MC 303, MC 305, and MC 306 and DOT 406 cargo tanks are not authorized.

Browse special provision B2

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.

Browse special provision IB2

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

Browse special provision T7

TP2

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

Where:
tr is the maximum mean bulk temperature during transport,
tf 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 (tf) and the maximum mean bulk temperature during transportation (tr) 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.

Browse special provision TP2

(8) Packing Authorizations (§173.***)

(8A) Exceptions	154	see 49 CFR §173.154
(8B) Non-bulk	202	see 49 CFR §173.202
(8C) Bulk	242	see 49 CFR §173.242

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location

Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

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

Source: 49 CFR §176.84

(3) Hazard class

8
Corrosive liquids

(4) Identification number

UN 2790

(5) Packing Group

III

Comparison View of PG

(6) Labels

(7) Special Provisions (§172.102)

148

Browse special provision 148

IB3

Authorized IBCs: Metal (31A, 31B and 31N); Rigid plastics (31H1 and 31H2); Composite (31HZ1 and 31HA2, 31HB2, 31HN2, 31HD2 and 31HH2).
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, except for UN2672 (also see special provision IP8 in Table 2 for UN2672).

Browse special provision IB3

Minimum test pressure (bar)	2.65
Minimum shell thickness	§ 178.274(d)(2)
Pressure-relief requirements	Normal
Bottom opening requirements	§ 178.275(d)(3)

Browse special provision T4

TP1

The maximum degree of filling must not exceed the degree of filling determined by the following:
TP1

Where:
tr is the maximum mean bulk temperature during transport, and tf is the temperature in degrees celsius of the liquid during filling.

Browse special provision TP1

(8) Packing Authorizations (§173.***)

(8A) Exceptions	154	see 49 CFR §173.154
(8B) Non-bulk	203	see 49 CFR §173.203
(8C) Bulk	242	see 49 CFR §173.242

(9) Quantity Limits

(9A) Passenger aircraft/rail	5 L
(9B) Cargo aircraft only	60 L

(10) Vessel stowage

(10A) Location

Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel.

Source: 49 CFR §172.101(k)

(10B) Other

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

Source: 49 CFR §176.84

Packing group comparison

Multiple packing groups apply to this entry. See assignment criteria in 49 CFR §173 Subpart D. Details are in the tabs above; differences are highlighted.

	PG II	PG III
1
2	Acetic acid solution, not less than 50 percent but not more than 80 percent acid, by mass	Acetic acid solution, with more than 10 percent and less than 50 percent acid, by mass
3	8	8
4	UN 2790	UN 2790
5	II	III
6	8	8
7	148, A3, A7, A10, B2, IB2, T7, TP2	148, IB3, T4, TP1
8A	154	154
8B	202	203
8C	242	242
9A	1 L	5 L
9B	30 L	60 L
10A	A	A
10B	53, 58	53, 58

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.

Hinweis: In der Kompatibilitätstabelle sind Stoffe der Gefahrenklasse 8 nur dann zu berücksichtigen, wenn der Stoff flüssig ist. Derzeit kann HazMat Tool nicht prüfen, ob der Stoff flüssig ist. Dies wird daher hier angenommen. Siehe PHMSA Interpretation #09-0252.

Full segregation table for class 8 · Browse UN entries for this class

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 3149	Hydrogen peroxide and peroxyacetic acid mixtures, stabilized with acids, water, and not more than 5 percent peroxyacetic acid	5.1
UN 3346	Phenoxyacetic acid derivative pesticide, liquid, flammable, toxic flash point less than 23 degrees C	3
UN 3347	Phenoxyacetic acid derivative pesticide, liquid, toxic, flammable, flash point not less than 23 degrees C	6.1
	Peroxyacetic acid, with more than 43 percent and with more than 6 percent hydrogen peroxide	Forbidden
UN 2790	Acetic acid solution, with more than 10 percent and less than 50 percent acid, by mass	8
UN 2789	Acetic acid, glacial or Acetic acid solution, with more than 80 percent acid, by mass	8
UN 3348	Phenoxyacetic acid derivative pesticide, liquid, toxic	6.1
UN 3345	Phenoxyacetic acid derivative pesticide, solid, toxic	6.1
UN 1742	Boron trifluoride acetic acid complex, liquid	8
UN 3419	Boron trifluoride acetic acid complex, solid	8
UN 1938	Bromoacetic acid solution	8
UN 3425	Bromoacetic acid, solid	8
UN 3250	Chloroacetic acid, molten	6.1
UN 1751	Chloroacetic acid, solid	6.1
UN 1750	Chloroacetic acid, solution	6.1