HazMat Tool — substance information

Ferrosilicon with 30 percent or more but less than 90 percent silicon

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 1408
Hazard class
4.3
Packing group
III
ERG guide
ERG 139
Special provisions
SP A1, SP A19, SP B6, SP IB8, SP IP4, SP IP7, SP T1, SP TP33, more…
Source
49 CFR §172 (15 June 2026)

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Ferrosilicon with 30 percent or more but less than 90 percent silicon

Emergency Response Guide No. 139

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

4.3
Dangerous when wet materials

(4) Identification number Help

UN 1408

(5) Packing Group Help

III

(6) Labels Help

Dangerous when wet materials (4.3) Poisonous liquids PG I Zone A (6.1)

(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.
A1
A19
B6
IB8
IP4
IP7
T1
TP33
W100

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

(8A) Exceptions151see 49 CFR §173.151
(8B) Non-bulk213see 49 CFR §173.213
(8C) Bulk240see 49 CFR §173.240

(9) Quantity Limits Help

(9A) Passenger aircraft/rail25 kg
(9B) Cargo aircraft only100 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 1395Aluminum ferrosilicon powder4.3
UN 2830Lithium ferrosilicon4.3