Ammonium hexafluorosilicate
Ammonium silicofluoride
CAS: 16919-19-0
Molecular Formula: F6H8N2Si
Ammonium hexafluorosilicate - Names and Identifiers
| Name | Ammonium silicofluoride |
| Synonyms | Cryptophthalite Ammomium fluosilicat Ammonium fluorosilicate Ammonium silicofluoride ammonium hexafluorosilicate diammonium hexafluorosilicate ammonium fluoro(oxo)silanolate AMMoniuM hexafluorosilicate, (trace Metal basis) Ammonium hexafluorosilicate, Puratronic (metals basis) |
| CAS | 16919-19-0 |
| EINECS | 240-968-3 |
| InChI | InChI=1/FO2Si.H3N/c1-4(2)3;/h;1H3/q-1;/p+1 |
Ammonium hexafluorosilicate - Physico-chemical Properties
| Molecular Formula | F6H8N2Si |
| Molar Mass | 178.15 |
| Density | 2.01g/mLat 25°C(lit.) |
| Melting Point | °Cd ec.) |
| Water Solubility | Slightly soluble in water. Insoluble in alcohol and acetone. |
| Solubility | water solubility 18 g/100 g water. |
| Vapor Presure | 9.99Pa at 20℃ |
| Appearance | Crystalline Powder and Chunks |
| Specific Gravity | 2.011 |
| Color | White |
| Exposure Limit | ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
| Merck | 14,527 |
| Sensitive | 0: forms stable aqueous solutions |
| Physical and Chemical Properties | Character: colorless crystalline powder. Odorless. relative density 2.011(α type) soluble in alcohol and water, insoluble in acetone. |
| Use | For the preparation of disinfectants, antiseptics, pesticides, etc |
Ammonium hexafluorosilicate - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | 23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2854 6.1/PG 3 |
| WGK Germany | 2 |
| RTECS | VV7800000 |
| TSCA | Yes |
| Hazard Note | Toxic |
| Hazard Class | 6.1 |
| Packing Group | III |
| Toxicity | LD orally in guinea pigs: 150 mg/kg (Simonin, Pierron) |
Ammonium hexafluorosilicate - Upstream Downstream Industry
| Raw Materials | Fluorosilicic acid Ammonium Bicarbonate |
Ammonium hexafluorosilicate - Nature
Open Data Verified Data
colorless crystalline powder. There are two crystal forms a and B, a type is equiaxed crystal system, and B type is triclinic system. Odorless. Relative density: Type A 2.011; Type B 152. Soluble in alcohol and water, insoluble in acetone. Stable in air, but long-term heating will destroy the B- type crystal system and transform it into A- type. Toxic!
Last Update：2024-01-02 23:10:35
Ammonium hexafluorosilicate - Preparation Method
Open Data Verified Data
neutralization method: fluorophore powder, silica sand and sulfuric acid reaction to produce fluosilicic acid (see fluosilicic acid), and then neutralized to pH 8 with ammonia, while hot pressure filtration, remove insoluble impurities, and then concentrated, crystallization, centrifugal separation, drying, preparation of ammonium fluorosilicate product.
Last Update：2022-01-01 11:01:19
Ammonium hexafluorosilicate - Use
Open Data Verified Data
It is used as disinfectant, glass etchant, mothproofing agent for textiles and wood preservative in brewing industry. It is also used for light metal casting, electroplating, extracting potassium from green sand and preparing artificial cryolite and ammonium chlorate. It is also used for the determination of barium salt in chemical analysis.
Last Update：2022-01-01 11:01:19
Ammonium hexafluorosilicate - Safety
Open Data Verified Data
This product is non-flammable, toxic, with strong irritation. Reaction with acid, release of toxic corrosive flue gas. By high heat decomposition of toxic gases. Poisoning by ingestion or inhalation. It has a strong stimulating effect on eyes, skin, mucous membranes and upper respiratory tract. Inhalation can cause laryngeal, bronchial spasm, inflammation, chemical Pneumonia, pulmonary edema. Precautions for operation: closed operation to provide adequate partial ventilation. Prevent the release of dust into the air of the workshop. Operators must be specially trained and strictly follow the operating procedures. It is recommended that the operator wear a dust mask (full face mask), adhesive clothing and rubber gloves. Dust should be avoided. Avoid contact with oxidants and acids. Emergency treatment equipment for leakage shall be provided. Harmful substances may remain in the empty container. A plastic woven bag was lined with a polyethylene plastic bag. 50kg net weight per bag. Should be stored in a cool, ventilated, dry warehouse. Keep away from fire and heat source. Protection from direct sunlight. The packaging is sealed. Should be stored separately from the oxidant, acids, edible chemicals, avoid mixing storage. The storage area shall have appropriate materials for containment of the leakage. Toxic substances. Risk code: GB 6.1 class 61514. No. 2854; IMDG CODE P. 6250, Class 6.1. Fire extinguishing method: fire-fighting personnel must wear full-body fire protection clothing and fire-fighting in the upwind direction. Move the container from the fire scene to the open space as far as possible when extinguishing the fire. Then select the appropriate fire extinguishing agent according to the cause of fire.
Last Update：2022-01-01 11:01:20
Ammonium hexafluorosilicate - Reference Information
| LogP | -6.01 at 20℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 18.6g/20 ℃ |
| toxicity | see sodium fluosilicate. |
| Use | for the preparation of disinfectants, antiseptics, pesticides, etc. used as disinfectants, glass Etchants, mothproofing agents for textiles, wood preservatives. It is also used for light metal casting, electroplating, extracting potassium from green sand and preparing cryolite and ammonium chlorate. It is also used for the determination of barium salt in chemical analysis. used as an analytical reagent, and also used in the preparation of preservatives etching glass, pesticides, heat welding flux. |
| production method | fluosilicic acid (see fluosilicic acid) is prepared by the reaction of fluticpowder, silica sand and sulfuric acid by neutralization method, then ammonia neutralization to about pH 8, while hot pressure filtration, remove insoluble impurities, and then by concentration, crystallization, centrifugal separation, drying, prepared ammonium fluorosilicate product. H2SiF6 2NH4OH →(NH4)2SiF6 2H2O |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:21:28
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Raw Materials for Ammonium hexafluorosilicate