HazMat Tool — substance information

Organic peroxide type B, solid, temperature controlled

HMT May 2026

UN / ID: UN 3112
Hazard class: 5.2
Packing group: —
ERG guide: ERG 148
Special provisions: SP 53
Source: 49 CFR §172 (2026/05)

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Organic peroxide type B, solid, temperature controlled

Substance Data

Source: PubChem (HSDB, 29.11.2019)

CAS-Number

105-64-6

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 148

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

5.2
Organic peroxides

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.

53	Packages of these materials must bear the subsidiary risk label, “EXPLOSIVE”, and the subsidiary hazard class/division must be entered in parentheses immediately following the primary hazard class in the shipping description, unless otherwise provided in this subchapter or through an approval issued by the Associate Administrator, or the competent authority of the country of origin. A copy of the approval shall accompany the shipping papers. Browse special provision 53

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	225	see 49 CFR §173.225
(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 3533	Polymerizing substance, solid, temperature controlled, n.o.s.	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 3238	Self-reactive solid type E, temperature controlled	4.1
UN 3240	Self-reactive solid type F, temperature controlled	4.1
UN 3534	Polymerizing substance, liquid, temperature controlled, n.o.s.	4.1
UN 3232	Self-reactive solid 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 3237	Self-reactive liquid type E, temperature controlled	4.1
UN 3239	Self-reactive liquid type F, temperature controlled	4.1
UN 3114	Organic peroxide type C, solid, temperature controlled	5.2
UN 3116	Organic peroxide type D, solid, temperature controlled	5.2