HazMat Tool — substance information

Oxidizing solid, self-heating, n.o.s.

HMT May 2026

UN / ID: UN 3100
Hazard class: 5.1
Packing group: I (multiple — see tabs)
ERG guide: ERG 135
Special provisions: SP 62
Source: 49 CFR §172 (2026/05)

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Oxidizing solid, self-heating, n.o.s.

Emergency Response Guide No. 135

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

Packing group I
Packing group II

(3) Hazard Class

5.1
Oxidizers

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.

62	Oxygen generators (see §171.8) are not authorized for transportation under this entry. Browse special provision 62

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	214	see 49 CFR §173.214
(8C) Bulk	214	see 49 CFR §173.214

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location	n/a see
(10B) Other	n/a

(3) Hazard Class

5.1
Oxidizers

(4) Identification number

UN 3100

(5) Packing Group

Comparison View of PG

(6) Labels

Spontaneously combustible materials (4.2)

(1) Symbols

(7) Special Provisions (§172.102)

62	Oxygen generators (see §171.8) are not authorized for transportation under this entry. Browse special provision 62

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	214	see 49 CFR §173.214
(8C) Bulk	214	see 49 CFR §173.214

(9) Quantity Limits

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

(10) Vessel stowage

(10A) Location	n/a see
(10B) Other	n/a

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 I	PG II
1	G	G
2	Oxidizing solid, self-heating, n.o.s.	Oxidizing solid, self-heating, n.o.s.
3	5.1	5.1
4	UN 3100	UN 3100
5	I	II
6	5.1, 4.2	5.1, 4.2
7	62	62
8A	None	None
8B	214	214
8C	214	214
9A	Forbidden	Forbidden
9B	Forbidden	Forbidden
10A	n/a	n/a
10B	n/a	n/a

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 2793	Ferrous metal borings or Ferrous metal shavings or Ferrous metal turnings or Ferrous metal cuttings in a form liable to self-heating	4.2
UN 2968	Maneb stabilized or Maneb preparations, stabilized against self-heating	4.3
UN 3397	Organometallic substance, solid, water-reactive, self-heating	4.3
UN 3126	Self-heating solid, corrosive, organic, n.o.s	4.2
UN 3128	Self-heating solid, toxic, organic, n.o.s	4.2
UN 3188	Self-heating liquid, corrosive, inorganic, n.o.s	4.2
UN 3185	Self-heating liquid, corrosive, organic, n.o.s	4.2
UN 3187	Self-heating liquid, toxic, inorganic, n.o.s	4.2
UN 3184	Self-heating liquid, toxic, organic, n.o.s	4.2
UN 3127	Self-heating solid, oxidizing, n.o.s.	4.2
UN 3095	Corrosive solids, self-heating, n.o.s	8
UN 3400	Organometallic substance, solid, self-heating	4.2
UN 3192	Self-heating solid, corrosive, inorganic, n.o.s.	4.2
UN 3190	Self-heating solid, inorganic, n.o.s	4.2
UN 3088	Self-heating solid, organic, n.o.s	4.2