HazMat Tool — substance information

Iodine pentafluoride

HMT May 2026

UN / ID: UN 2495
Hazard class: 5.1
Packing group: I
ERG guide: ERG 144
Special provisions: —
Source: 49 CFR §172 (2026/05)

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Iodine pentafluoride

Iodine pentafluoride is an interhalogen compound with chemical formula IF5. It is one of the fluorides of iodine. It is a colorless liquid, although impure samples appear yellow. It is used as a fluorination reagent and even a solvent in specialized syntheses. Wikipedia

Emergency Response Guide No. 144

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

5.1
Oxidizers

(4) Identification number

UN 2495

(5) Packing Group

(6) Labels

(7) Special Provisions (§172.102)

(8) Packing Authorizations (§173.***)

(8A) Exceptions	None
(8B) Non-bulk	205	see 49 CFR §173.205
(8C) Bulk	243	see 49 CFR §173.243

(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

25	see 49 CFR §176.84
40	see 49 CFR §176.84
52	see 49 CFR §176.84
53	see 49 CFR §176.84
58	see 49 CFR §176.84
66	see 49 CFR §176.84
90	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 1973	Chlorodifluoromethane and chloropentafluoroethane mixture or Refrigerant gas R 502 with fixed boiling point, with approximately 49 percent chlorodifluoromethane	2.2
UN 3298	Ethylene oxide and pentafluoroethane mixture with not more than 7.9 percent ethylene oxide	2.2
UN 3524	Phosphorus pentafluoride, adsorbed	2.3
UN 1020	Chloropentafluoroethane or Refrigerant gas R 115	2.2
UN 3220	Pentafluoroethane or Refrigerant gas R 125	2.2
UN 1732	Antimony pentafluoride	8
UN 1745	Bromine pentafluoride	5.1
UN 2548	Chlorine pentafluoride	2.3
UN 2198	Phosphorus Pentafluoride	2.3