10/16/2017 Report | CAMEO Chemicals | NOAA
Chemical Datasheet
AMMONIUM FLUOROSILICATE
Chemical Identifiers
CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code 16919-19-0 2854 Poison ASL
NFPA 704 data unavailable
NIOSH Pocket Guide International Chem Safety Card none none
General Description A white crystalline solid. Noncombustible. Corrodes aluminum. Used as a disinfectant, in etching glass, metal casting, and electroplating.
Hazards
Reactivity Alerts
Water-Reactive Air-Reactive
Air & Water Reactions Water soluble.
Fire Hazard Special Hazards of Combustion Products: Toxic and irritating hydrogen fluoride, silicon tetrafluoride, and oxides of nitrogen may form in fires. (USCG, 1999)
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. (USCG, 1999)
Reactivity Profile Salts, basic, such as AMMONIUM FLUOROSILICATE, 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.
Ammonium fluorosilicate reacts with water to form hydrofluoric acid, a source of fluoride ions. Unlike other halide ions, the https://cameochemicals.noaa.gov/report?key=CH5407 1/4 10/16/2017 Report | CAMEO Chemicals | NOAA fluoride ion is quite 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.
Belongs to the Following Reactive Group(s)
Salts, Basic Halogenating Agents
Potentially Incompatible Absorbents Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below.
Cellulose-Based Absorbents Mineral-Based & Clay-Based Absorbents Dirt/Earth
Response Recommendations
Isolation and Evacuation Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]:
As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)
Firefighting Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]:
SMALL FIRE: Dry chemical, CO2 or water spray.
LARGE FIRE: Water spray, fog or regular foam. Move containers from fire area if you can do it without risk. Dike fire-control water for later disposal; do not scatter the material. Use water spray or fog; do not use straight streams.
FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2016)
Non-Fire Response Excerpt from ERG Guide 151 [Substances - Toxic (Non-combustible)]:
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. (ERG, 2016)
Protective Clothing Dust respirator; acid-resistant clothing and hat; rubber gloves; goggles and safety shoes (USCG, 1999)
DuPont Tychem® Suit Fabrics https://cameochemicals.noaa.gov/report?key=CH5407 2/4 10/16/2017 Report | CAMEO Chemicals | NOAA No information available.
First Aid INHALATION: remove patient to fresh air.
INGESTION: cause vomiting by giving soapy water or mustard water; have patient drink large quantities of lime water; if necessary, give stimulant such as strong coffee; keep patient warm.
EYES: flush with water for 20 min., holding eyelids open.
SKIN: wash with soap and water. (USCG, 1999)
Physical Properties
Chemical Formula: F6Si.2H4N
Flash Point: data unavailable Lower Explosive Limit (LEL): data unavailable Upper Explosive Limit (UEL): data unavailable Autoignition Temperature: data unavailable Melting Point: data unavailable Vapor Pressure: data unavailable Vapor Density (Relative to Air): data unavailable Specific Gravity: 2 at 68 ° F (USCG, 1999) Boiling Point: data unavailable Molecular Weight: 178.14 (USCG, 1999) Water Solubility: data unavailable Ionization Potential: data unavailable IDLH: data unavailable AEGLs (Acute Exposure Guideline Levels) No AEGL information available. ERPGs (Emergency Response Planning Guidelines) No ERPG information available. PACs (Protective Action Criteria)
Chemical PAC-1 PAC-2 PAC-3 Ammonium hexafluorosilicate; (Ammonium silicofluoride) (16919-19-0) 12 mg/m3 130 mg/m3 780 mg/m3 (DOE, 2016)
Regulatory Information
EPA Consolidated List of Lists
CAS Number/ EPCRA EPCRA EPCRA CAA 313 Category 302 304 CERCLA 313 RCRA 112(r) Regulatory Name Code EHS TPQ EHS RQ RQ TRI Code RMP TQ Ammonium silicofluoride 16919-19-0 1000 pounds
https://cameochemicals.noaa.gov/report?key=CH5407 3/4 10/16/2017 Report | CAMEO Chemicals | NOAA (EPA List of Lists, 2015) DHS Chemical Facility Anti-Terrorism Standards (CFATS) No regulatory information available.
Alternate Chemical Names
AMMONIUM FLUOROSILICATE AMMONIUM FLUOROSILICATE ((NH4)2SIF6) AMMONIUM FLUOSILICATE AMMONIUM HEXAFLUOROSILICATE AMMONIUM HEXAFLUOROSILICATE ((NH4)2SIF6) AMMONIUM SILICOFLUORIDE AMMONIUM SILICON FLUORIDE ((NH4)2SIF6) DIAMMONIUM FLUOSILICATE ((NH4)2SIF6) DIAMMONIUM HEXAFLUOROSILICATE DIAMMONIUM HEXAFLUOROSILICATE(2-) DIAMMONIUM SILICON HEXAFLUORIDE LPE 6
https://cameochemicals.noaa.gov/report?key=CH5407 4/4