Ammonium fluorosilicate


Ammonium fluorosilicate (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH4)2SiF6. It is a toxic chemical, like all salts of fluorosilicic acid. It is made of white crystals, which have at least three polymorphs and appears in nature as rare minerals cryptohalite or bararite. Wikipedia

Substance Data

Source: TOXNET (HSDB, 23.10.2018)

CAS-Number

16919-19-0

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 151

Data from the Hazardous Materials Table

Source: 49 CFR §172 (2018/07)

(3) Hazard Class

6.1
Poisonous Material

(4) Identification number Help

UN 2854

(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, Storage

In this table a statement is contained for each hazard class whether the loading, transport or storage with other hazard classes is allowed, is not permitted or is restricted. The table is based on U.S.-Code 49 CFR §177.848.

There are no restrictions with hazardous materials, as pointed out in the instructions for using the Segregation Table (see 49 CFR §177.848(e)). But please, refer to following requirements in 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.

Substances with similar name

UN-NumberNameHazard Class
Ammonium bifluoride solution, see Ammonium hydrogen difluoride, solution
UN 1439Ammonium dichromate5.1
UN 1843Ammonium dinitro-o-cresolate, solid6.1
UN 2854Ammonium fluorosilicate6.1
Ammonium fulminateForbidden
UN 1727Ammonium hydrogendifluoride, solid8
Ammonium hydrosulfide, solution, see Ammonium sulfide solution
UN 2426Ammonium nitrate, liquid (hot concentrated solution)5.1
UN 0222Ammonium nitrate, with more than 0.2 percent combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance1.1D
UN 1942Ammonium nitrate, with not more than 0.2% combustible substances, including any organic substance calculated as carbon, to the exclusion of any other added substance5.1
NA 0331Ammonium nitrate-fuel oil mixture containing only prilled ammonium nitrate and fuel oil1.5D
UN 2067Ammonium nitrate based fertilizer5.1
UN 3375Ammonium nitrate emulsion or Ammonium nitrate suspension or Ammonium nitrate gel, intermediate for blasting explosives5.1
UN 0402Ammonium perchlorate1.1D
UN 1310Ammonium picrate, wetted with not less than 10 percent water, by mass4.1
UN 2818Ammonium polysulfide, solution8
Di-(beta-nitroxyethyl) ammonium nitrateForbidden
UN 2687Dicyclohexylammonium nitrite4.1
UN 1630Mercury ammonium chloride6.1
UN 2863Sodium ammonium vanadate6.1
Tetraethylammonium perchlorate (dry)Forbidden
UN 1835Tetramethylammonium hydroxide solution8
UN 1512Zinc ammonium nitrite5.1