HazMat Tool — substance information

Trinitrophenol (picric acid), wetted, with not less than 10 percent water by mass

HMT 15 June 2026

UN / ID: UN 3364
Hazard class: 4.1
Packing group: I
ERG guide: ERG 113
Special provisions: SP 23, SP A8, SP A19, SP N41, SP N84, SP W31
Source: 49 CFR §172 (15 June 2026)

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Trinitrophenol (picric acid), wetted, with not less than 10 percent water by mass

Picric acid is an organic compound with the formula (O2N)3C6H2OH. Its IUPAC name is 2,4,6-trinitrophenol (TNP). The name "picric" comes from Greek: πικρός (pikros), meaning "bitter", due to its bitter taste. It is one of the most acidic phenols Wikipedia

Substance Data

Source: PubChem (HSDB, 04.12.2019)

CAS-Number

88-89-1

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 113

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

4.1
Flammable solids

(4) Identification number

UN 3364

(5) Packing Group

(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.

23	This material may be transported under the provisions of Division 4.1 only if it is so packed that the percentage of diluent will not fall below that stated in the shipping description at any time during transport. Quantities of not more than 500 g per package with not less than 10 percent water by mass may also be classed in Division 4.1, provided a negative test result is obtained when tested in accordance with test series 6(c) of the UN Manual of Tests and Criteria (IBR, see § 171.7 of this subchapter). Browse special provision 23
A8	For combination packagings, if glass inner packagings (including ampoules) are used, they must be packed with cushioning material in tightly closed metal receptacles before packing in outer packagings. Browse special provision A8
A19	Combination packagings consisting of outer fiber drums or plywood drums, with inner plastic packagings, are not authorized for transportation by aircraft. Browse special provision A19
N41	Metal construction materials are not authorized for any part of a packaging which is normally in contact with the hazardous material. Browse special provision N41
N84	The maximum quantity per package is 500 g (1.1 lbs.). Browse special provision N84
W31	Non-bulk packagings must be hermetically sealed. Browse special provision W31

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	211	see 49 CFR §173.211
(8C) Bulk	None

(9) Quantity Limits

(9A) Passenger aircraft/rail	0.5 kg
(9B) Cargo aircraft only	0.5 kg

(10) Vessel stowage

(10A) Location

Stowage category “E” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel carrying a number of passengers limited to not more than the larger of 25 passengers, or one passenger per each 3 m of overall vessel length, but is prohibited from carriage on a passenger vessel in which the limiting number of passengers is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

28	see 49 CFR §176.84
36	see 49 CFR §176.84

Source: 49 CFR §176.84

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.

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 0219	Trinitroresorcinol or Styphnic acid, dry or wetted with less than 20 percent water, or mixture of alcohol and water, by mass	1.1D
UN 0130	Lead styphnate, wetted or Lead trinitroresorcinate, wetted with not less than 20 percent water or mixture of alcohol and water, by mass	1.1A
UN 0154	Trinitrophenol or Picric acid, dry or wetted with less than 30 percent water, by mass	1.1D
UN 0394	Trinitroresorcinol, wetted or Styphnic acid, wetted with not less than 20 percent water, or mixture of alcohol and water by mass	1.1D
UN 0388	Trinitrotoluene and Trinitrobenzene mixtures or TNT and trinitrobenzene mixtures or TNT and hexanitrostilbene mixtures or Trinitrotoluene and hexanitrostilnene mixtures	1.1D
UN 0215	Trinitrobenzoic acid, dry or wetted with less than 30 percent water, by mass	1.1D
UN 0209	Trinitrotoluene or TNT, dry or wetted with less than 30 percent water, by mass	1.1D
UN 1344	Trinitrophenol, wetted with not less than 30 percent water, by mass	4.1
UN 0389	Trinitrotoluene mixtures containing Trinitrobenzene and Hexanitrostilbene or TNT mixtures containing trinitrobenzene and hexanitrostilbene	1.1D
UN 0214	Trinitrobenzene, dry or wetted with less than 30 percent water, by mass	1.1D
UN 1355	Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass	4.1
UN 3368	Trinitrobenzoic acid, wetted with not less than 10% water by mass	4.1
UN 1356	Trinitrotoluene, wetted or TNT, wetted, with not less than 30 percent water by mass	4.1
UN 1354	Trinitrobenzene, wetted with not less than 30 percent water, by mass	4.1
UN 3365	Trinitrochlorobenzene (picryl chloride), wetted, with not less than 10% water by mass	4.1