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Self-reactive solid type C

HMT 15 June 2026

UN / ID: UN 3224
Hazard class: 4.1
Packing group: —
ERG guide: ERG 149
Special provisions: —
Source: 49 CFR §172 (15 June 2026)

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Self-reactive solid type C

Emergency Response Guide No. 149

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard class

4.1
Flammable solids

This entry is signed with "G". The letter "G" identifies proper shipping names for which one or more technical names of the hazardous material must be entered in parentheses, in association with the basic description. (See §172.203(k)).

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(8A) Exceptions	151	see 49 CFR §173.151
(8B) Non-bulk	224	see 49 CFR §173.224
(8C) Bulk	None

(9) Quantity Limits

(9A) Passenger aircraft/rail	5 kg
(9B) Cargo aircraft only	10 kg

(10) Vessel stowage

(10A) Location

Stowage category “D” means the material must be stowed “on deck only” 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 the material is prohibited on a passenger vessel in which the limiting number of passengers is exceeded.

Source: 49 CFR §172.101(k)

(10B) Other

25	see 49 CFR §176.84
52	see 49 CFR §176.84
53	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.

Full segregation table for class 4.1 · 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 3490	Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50	6.1
UN 3491	Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50	6.1
UN 3386	Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 1000 ml/m3 and saturated vapor concentration greater than or equal to 10 LC50	6.1
UN 3385	Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50	6.1
UN 3476	Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing water-reactive substances	4.3
UN 3234	Self-reactive solid type C, temperature controlled	4.1
UN 3397	Organometallic substance, solid, water-reactive, self-heating	4.3
UN 3393	Organometallic substance, solid, pyrophoric, water-reactive	4.2
UN 3396	Organometallic substance, solid, water-reactive, flammable	4.3
UN 3121	Oxidizing solid, water reactive, n.o.s	5.1
UN 3232	Self-reactive solid type B, temperature controlled	4.1
UN 3236	Self-reactive solid type D, temperature controlled	4.1
UN 3238	Self-reactive solid type E, temperature controlled	4.1
UN 3240	Self-reactive solid type F, temperature controlled	4.1
UN 3135	Water-reactive solid, self-heating, n.o.s.	4.3