HazMat Tool — substance information

Mercury fulminate, wetted with not less than 20 percent water, or mixture of alcohol and water, by mass

HMT May 2026
UN / ID
UN 0135
Hazard class
1.1A
Packing group
ERG guide
Special provisions
SP 111, SP 117
Source
49 CFR §172 (2026/05)

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Mercury fulminate, wetted with not less than 20 percent water, or mixture of alcohol and water, by mass


Mercury(II) fulminate is an explosive with the chemical formula Hg(CNO)2. When recrystallized from water it exists as the hemihydrate 2 Hg(CNO)2·H2O. The anhydrous form is obtained by recrystallization from ethanol. It is highly sensitive to friction, heat and shock and is mainly used as a trigger for other explosives in percussion caps and detonators. Wikipedia

Substance Data

Source: PubChem

CAS-Number

628-86-4

Flash Point

n/a

Boiling Point

n/a

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

1.1
Explosives

(4) Identification number Help

UN 0135

(5) Packing Group Help

n/a

(6) Labels Help

Explosives (1.1A)

Compatibility group of explosives - Description of substances or article to be classified

Group: A

Primary explosive substance

Source: 49 CFR §173.52

(7) Special Provisions (§172.102) Help

×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.
111
117

(8) Packing Authorizations (§173.***) Help

(8A) ExceptionsNone
(8B) Non-bulk62see 49 CFR §173.62
(8C) BulkNone

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft onlyForbidden

(10) Vessel stowage Help

(10A) Location
(10B) Other

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.

Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.

Similar substances

UN / IDProper shipping nameHazard class
Fulminate of mercury (dry)Forbidden
Silver fulminate (dry)Forbidden
Ammonium fulminateForbidden