| Identification | More | [Name]
Ammonium hexafluorosilicate | [CAS]
16919-19-0 | [Synonyms]
AMMONIUM FLUOROSILICATE
AMMONIUM FLUOSILICATE
AMMONIUM HEXAFLUOROSILICATE
Ammonium silicfluoride
AMMONIUM SILICOFLUORIDE
ai3-25550-x
ammoniumsiliconfluoride
caswellno043
diammoniumfluorosilicate
diammoniumfluosilicate
diammoniumfluosilicate((nh4)2sif6)
diammoniumhexafluorosilicate
diammoniumhexafluorosilicate(2-)
diammoniumsiliconhexafluoride
epapesticidechemicalcode075301
fluorosilicicacid,ammoniumsalt
hexafluoro-silicate(2-diammonium
lpe6
Silicate(2-),hexafluoro-,diammonium
Ammomium fluosilicate | [EINECS(EC#)]
240-968-3 | [Molecular Formula]
F6H8N2Si | [MDL Number]
MFCD00010887 | [Molecular Weight]
178.15 | [MOL File]
16919-19-0.mol |
| Chemical Properties | Back Directory | [Appearance]
Ammonium hexafluorosilicate is a white crystalline
powder. Odorless. | [Melting point ]
°Cd ec.) | [density ]
2.01 g/mL at 25 °C(lit.)
| [vapor pressure ]
9.99Pa at 20℃ | [solubility ]
water solubility 18 g/100 g water. | [form ]
Crystalline Powder and Chunks | [color ]
White | [Specific Gravity]
2.011 | [Water Solubility ]
Slightly soluble in water. Insoluble in alcohol and acetone. | [Hydrolytic Sensitivity]
0: forms stable aqueous solutions | [Merck ]
14,527 | [Exposure limits]
ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 | [InChI]
InChI=1S/F6Si.2H3N/c1-7(2,3,4,5)6;;/h;2*1H3/q-2;;/p+2 | [InChIKey]
ITHIMUMYFVCXSL-UHFFFAOYSA-P | [SMILES]
[Si-2](F)(F)(F)(F)(F)F.[NH4+].[NH4+] | [LogP]
-6.01 at 20℃ | [CAS DataBase Reference]
16919-19-0(CAS DataBase Reference) | [EPA Substance Registry System]
16919-19-0(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
T | [Risk Statements ]
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed . | [Safety Statements ]
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 label where possible) . | [RIDADR ]
UN 2854 6.1/PG 3
| [WGK Germany ]
2
| [RTECS ]
VV7800000
| [Hazard Note ]
Toxic | [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
III | [HS Code ]
2826908090 | [Hazardous Substances Data]
16919-19-0(Hazardous Substances Data) | [Toxicity]
LD orally in guinea pigs: 150 mg/kg (Simonin, Pierron) |
| Hazard Information | Back Directory | [General Description]
A white crystalline solid. Noncombustible. Corrodes aluminum. Used as a disinfectant, in etching glass, metal casting, and electroplating. | [Reactivity Profile]
Salts, basic, such as AMMONIUM FLUOROSILICATE(16919-19-0), are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. | [Air & Water Reactions]
Water soluble. | [Hazard]
Very toxic; fatal. | [Health Hazard]
Inhalation of dust can cause pulmonary irritation and can be fatal in some cases. Ingestion may be fatal. Contact with dust causes irritation of eyes and irritation or ulceration of skin. | [Potential Exposure]
This material is used as a pesticide
and miticide, wood preservative, soldering flux; light metal
casting; and in the etching of glass. | [Fire Hazard]
Special Hazards of Combustion Products: Toxic and irritating hydrogen fluoride, silicon tetrafluoride, and oxides of nitrogen may form in fires. | [First aid]
Move victim to fresh air. Call 911 or emergency
medical service. Give artificial respiration if victim is not
breathing. Do not use mouth-to-mouth method if victim
ingested or inhaled the substance; give artificial respiration
with the aid of a pocket mask equipped with a one-way
valve or other proper respiratory medical device.
Administer oxygen if breathing is difficult. Remove and
isolate contaminated clothing and shoes. In case of contact
with substance, immediately flush skin or eyes with running
water for at least 20 minutes. For minor skin contact,
avoid spreading material on unaffected skin. Keep victim
warm and quiet. Effects of exposure (inhalation, ingestion
or skin contact) to substance may be delayed. Ensure that
medical personnel are aware of the material(s) involved
and take precautions to protect themselves. Medical observation
is recommended for 24 to 48 hours after breathing
overexposure, as pulmonary edema may be delayed. As
first aid for pulmonary edema, a doctor or authorized paramedic
may consider administering a drug or other inhalation
therapy. | [Shipping]
UN2856 Fluorosilicates, n.o.s., Hazard Class:
6.1; Labels: 6.1-Poisonous materials, Technical Name
Required. | [Incompatibilities]
Aqueous solution is highly corrosive.
Contact with acids reacts to form hydrogen fluoride,
which is a highly corrosive and forms a toxic gas.
Corrosive to aluminum. Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates,
chlorine, bromine, fluorine, etc.); contact may cause fires
or explosions. Keep away from alkaline materials, strong
bases, strong acids, oxoacids, epoxides. Ammonium fluorosilicate
reacts with water to form
hydrofluoric acid, a source of fluoride ions. Unlike other
halide ions, the fluoride ion is highly reactive, acting as a
weak base and participating in some unique reactions. In
particular, fluorides react strongly with compounds containing
calcium, magnesium, or silicon ions, which means
that solutions containing soluble fluorides are corrosive to
both living tissue and glass. Hydrofluoric acid can cause
severe chemical burns and is one of the few materials that
can etch glass. It is also a toxic gas in its anhydrous
form. | [Chemical Properties]
Ammonium hexafluorosilicate is a white crystalline
powder. Odorless. | [Chemical Properties]
white slightly adhering crystalline powder | [Waste Disposal]
Consult with environmental
regulatory agencies for guidance on acceptable disposal
practices. Generators of waste containing this contaminant
(≥100 kg/mo) must conform with EPA regulations governing
storage, transportation, treatment, and waste disposal.
Incineration. | [Physical properties]
d 2.01 g cm?3; decomposes prior to melting;
odorless. | [Uses]
Ammonium hexafluorosilicate is used as a disinfectant and analytical reagent. It finds application in etching glass, metal casting, and electroplating. It is also employed as a wood preservative agent and mothproofing agent in textiles. It plays a useful application in soldering flux. It is also used to arrest caries treatment without discoloration on demineralized primary tooth enamel. | [Uses]
In pesticides; in soldering flux; etching glass. | [Preparation]
By reacting crude quartz with ammonium fluoride or ammonium hydrodifluoride or a mixture thereof in an aqueous medium when heated from 50 ° to 110 ° C. to form ammonium hexafluorosilicate, separating it from unreacted quartz and insoluble impurities by known methods (filtration or centrifugation) and subsequent concentration and cooling of the mother liquor for crystallization of Ammonium hexafluorosilicate.
| [Flammability and Explosibility]
Notclassified | [Purification Methods]
Crystallise the salt from water (2mL/g). After 3 recrystallisations, the Technical grade salt has Li, Na, K and Fe at 0.3, 0.2, 0.1 and 1.0 ppm respectively. |
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