16919-19-0
Product Name:
Ammonium hexafluorosilicate
Formula:
F6H8N2Si
Synonyms:
Cryptohalite
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Ammonium fluorosilicate appears as a white crystalline solid. Noncombustible. Corrodes aluminum. Used as a disinfectant, in etching glass, metal casting, and electroplating. |
|---|---|
| Color/Form | CRYSTALLINE POWDER |
| Odor | ODORLESS |
| Melting Point | TWO MODIFICATIONS @ ROOM TEMP: STABLE, CUBIC PHASE; METASTABLE, TRIGONAL PHASE |
| Solubility | SLIGHTLY SOL IN ALCOHOL; INSOL IN ACETONE |
| Density | 2 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Decomposition | When heated to decomposition it emits very toxic fumes of /hydrogen fluoride/, ammonia, and nitroxides. |
| Corrosivity | Corrosive to aluminum |
| Other Experimental Properties | MP: DECOMP; INDEX OF REFRACTION: 1.3696 (ALPHA); DENSITY: 2.011 (ALPHA), 2.152 (BETA); (ALPHA) OCTAGONAL CRYSTALS, (BETA) HEXAGONAL CRYSTALS, COLORLESS |
| Chemical Classes | Metals -> Metals, Inorganic Compounds |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Skull and Crossbones Acute Toxicity GHS06 |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. |
COMPUTED DESCRIPTORS
| Molecular Weight | 178.153 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 7 |
| Rotatable Bond Count | 0 |
| Exact Mass | 178.03609377 g/mol |
| Monoisotopic Mass | 178.03609377 g/mol |
| Topological Polar Surface Area | 2 Ų |
| Heavy Atom Count | 9 |
| Formal Charge | 0 |
| Complexity | 62.7 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 3 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Ammonium fluorosilicate appears as a white crystalline solid. Noncombustible. Corrodes aluminum. Used as a disinfectant, in etching glass, metal casting, and electroplating.