HazMat Tool — substance information

Sodium fluorosilicate

HMT May 2026
UN / ID
UN 2674
Hazard class
6.1
Packing group
III
ERG guide
ERG 154
Special provisions
SP IB8, SP IP3, SP T1, SP TP33
Source
49 CFR §172 (2026/05)

Spot an error in this entry?

Sodium fluorosilicate


Sodium fluorosilicate is a compound with the chemical formula Na2 Wikipedia

Substance Data

Source: PubChem (HSDB, 04.12.2019)

CAS-Number

16893-85-9

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 154

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

6.1
Poisonous Material

(4) Identification number Help

UN 2674

(5) Packing Group Help

III

(6) Labels Help

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.
IB8
IP3
T1
TP33

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

(8A) Exceptions153see 49 CFR §173.153
(8B) Non-bulk213see 49 CFR §173.213
(8C) Bulk240see 49 CFR §173.240

(9) Quantity Limits Help

(9A) Passenger aircraft/rail100 kg
(9B) Cargo aircraft only200 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.

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

  • §177.834 - General requirements
  • §177.835 - Class 1 materials
  • §177.837 - Class 3 materials
  • §177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
  • §177.839 - Class 8 (corrosive) materials
  • §177.840 - Class 2 (gases) materials
  • §177.841 - Division 6.1 and Division 2.3 materials
  • §177.842 - Class 7 (radioactive) material
  • §177.843 - Contamination of vehicles

Similar substances

UN / IDProper shipping nameHazard class
UN 2856Fluorosilicates, n.o.s6.1
UN 2854Ammonium fluorosilicate6.1
UN 2853Magnesium fluorosilicate6.1
UN 2655Potassium fluorosilicate6.1
UN 2855Zinc fluorosilicate6.1