HazMat Tool — substance information

1-Hydroxybenzotriazole, monohydrate

HMT May 2026
UN / ID
UN 3474
Hazard class
4.1
Packing group
I
ERG guide
ERG 113
Special provisions
SP N90
Source
49 CFR §172 (2026/05)

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1-Hydroxybenzotriazole, monohydrate

Emergency Response Guide No. 113

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

4.1
Flammable solids

(4) Identification number Help

UN 3474

(5) Packing Group Help

I

(6) Labels Help

Flammable solids (4.1)

(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.
N90

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

(8A) ExceptionsNone
(8B) Non-bulk211see 49 CFR §173.211
(8C) BulkNone

(9) Quantity Limits Help

(9A) Passenger aircraft/rail0.5 kg
(9B) Cargo aircraft only0.5 kg

(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
UN 05081-Hydroxybenzotriazole, anhydrous, dry or wetted with less than 20 percent water, by mass1.3C