HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

Self-reactive solid type E, temperature controlled

HMT 15 June 2026

UN / ID: UN 3238
Hazard class: 4.1
Packing group: —
ERG guide: ERG 150
Special provisions: —
Source: 49 CFR §172 (15 June 2026)

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Self-reactive solid type E, temperature controlled

Emergency Response Guide No. 150

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)

×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.

—	see 49 CFR §172.102

(8) Packing Authorizations (§173.***)

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

(9) Quantity Limits

(9A) Passenger aircraft/rail	Forbidden
(9B) Cargo aircraft only	Forbidden

(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

2	see 49 CFR §176.84
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.

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 3257	Elevated temperature liquid, n.o.s., at or above 100 C and below its flash point (including molten metals, molten salts, etc.)	9
UN 3256	Elevated temperature liquid, flammable, n.o.s., with flash point above 37.8 C, at or above its flash point	3
UN 3112	Organic peroxide type B, solid, temperature controlled	5.2
UN 3114	Organic peroxide type C, solid, temperature controlled	5.2
UN 3116	Organic peroxide type D, solid, temperature controlled	5.2
UN 3120	Organic peroxide type F, solid, temperature controlled	5.2
UN 3533	Polymerizing substance, solid, temperature controlled, n.o.s.	4.1
UN 3232	Self-reactive solid type B, temperature controlled	4.1
UN 3234	Self-reactive solid type C, temperature controlled	4.1
UN 3236	Self-reactive solid type D, temperature controlled	4.1
UN 3240	Self-reactive solid type F, temperature controlled	4.1
UN 3231	Self-reactive liquid type B, temperature controlled	4.1
UN 3233	Self-reactive liquid type C, temperature controlled	4.1
UN 3235	Self-reactive liquid type D, temperature controlled	4.1
UN 3239	Self-reactive liquid type F, temperature controlled	4.1