Section 1: Product Identification
Chemical Name: Magnesium hexafluorosilicate hexahydrate, 98%
CAS Registry Number: 18972-56-0
Formula: MgSiF6.6H2O
EINECS Number: none
Chemical Family: halometallate salts
Synonym: Magnesium fluorosilicate, Magnesium silicofluoride
Section 2: Composition and Information on Ingredients
Ingredient CAS Number Percent ACGIH (TWA) OSHA (PEL)
Title compound 18972-56-0 100% 2.5mg/m3 (as F) 2.5mg/m3 (as F)
Section 3: Hazards Identification
Irritating to eyes, skin, and respiratory tract. Harmful if swallowed. If inhaled or swallowed, this compound may,
Emergency Overview: to the extent that it may form water soluble fluoride, cause fluoride poisoning. Early symptoms include nausea,
vomiting, diarrhea, and weakness
Primary Routes of Exposure: Contact with skin and eyes. Inhalation of dust.
Eye Contact: Causes irritation and may cause serious eye damage. Effects may not immediately appear.
Causes irritation, with redness and pain. Soluble fluoride may be corrosive. Effects may not appear
Skin Contact:
immediately
Inhalation of dust causes severe irritation to the respiratory tract, causing coughing, sore throat, and labored
Inhalation:
breathing.
Ingestion: Harmful if swallowed. May cause salivation, nausea, vomiting, diarrhea, and abdominal pain.
Irritating to eys, skin and respiratory tract. Dust: Fluoride poisoning may cause nausea, vomiting, diarrhea,
Acute Health Affects:
weakness, coma, respiratory failure and cardiovascular collapse.
Chronic Health Affects: Prolonged exposure to hydrolysable fluorine compounds can cause deterioration of bone and tooth structure.
NTP: No
IARC: No
OSHA: No
SECTION 4: First Aid Measures
Immediately flush the eyes with copious amounts of water for at least 10-15 minutes. A victim may need
Eye Exposure:
assistance in keeping their eye lids open. Get immediate medical attention.
Wash the affected area immediately with water. Remove contaminated clothing if necessary. Seek medical
Skin Exposure:
assistance if irritation persists.
Remove the victim to fresh air. Closely monitor the victim for signs of respiratory problems, such as difficulty
Inhalation:
in breathing, coughing, wheezing, or pain. In such cases seek immediate medical assistance.
Seek medical attention immediately. Keep the victim calm. Give the victim water (only if conscious). Induce
Ingestion:
vomiting only if directed by medical personnel.
SECTION 5: Fire Fighting Measures
Flash Point: not applicable
Autoignition Temperature: none
Explosion Limits: none
Extinguishing Medium: None. Material is non-flammable.
If this product is involved in a fire, fire fighters should be equipped with a NIOSH approved positive pressure
Special Fire Fighting Procedures:
self- contained breathing apparatus and full protective clothing.
Hazardous Combustion and If involved in a fire this material may emit corrosive fumes of hydrofluoric acid.
Decomposion Products:
Unusual Fire or Explosion Hazards: No unusual fire or explosion hazards.
SECTION 6: Accidental Release Measures
Small spills can be mixed with powdered sodium bicarbonate, lime, or calcium carbonate and swept up. Avoid
Spill and Leak Procedures: raising dust. Spillage in areas not adequately ventilated may require an evacuation of area. Emergency
response teams will require self-contained breathing apparatus.
SECTION 7: Handling and Storage
Handling and Storage: Store in a tightly sealed non-glass container away from moisture.
SECTION 8: Exposure Controls and Personal Protection
Eye Protection: Always wear approved safety glasses when handling a chemical substance in the laboratory.
Skin Protection: Wear protective clothing and gloves. Consult with glove manufacturer to determine the proper type of glove.
Ventilation: Solid may form a toxic fine dust. If possible, handle the solid in an efficient fume hood.
If in form of fine dust and ventilation is not available a respirator should be worn. The use of respirators
Respirator:
requires a Respirator Protection Program to be in compliance with 29 CFR 1910.134.
Ventilation: Solid may form a toxic fine dust. If possible, handle the solid in an efficient fume hood.
Additional Protection: No additional protection required.
SECTION 9: Physical and Chemical Properties
Color and Form: white pwdr.
Molecular Weight: 166.39 (274.48)
Melting Point: no data
Boiling Point: no data
Vapor Pressure: no data
Specific Gravity: 1.788
Odor: none
Solubility in Water: soluble
SECTION 10: Stability and Reactivity
Stability: air and moisture stable
Hazardous Polymerization: no hazardous polymerization
Conditions to Avoid: none
Incompatibility: active metals
Decomposition Products: hydrogen fluoride, magnesium fluoride and silicon fluorides
SECTION 11: Toxicological Information
RTECS Data: Oral (guinea pig); LD50:200 mg/kg. Subcutaneous (frog); LDLo:420 mg/kg.
Carcinogenic Effects: no data
Mutagenic Effects: no data
Tetratogenic Effects: no data
SECTION 12: Ecological Information
Ecological Information: No information available
SECTION 13: Disposal Considerations
Disposal: Dispose of according to local, state and federal regulations.
SECTION 14: Transportation
Shipping Name (CFR): Magnesium fluorosilicate
Hazard Class (CFR): 6.1
Additional Hazard Class (CFR): NA
Packaging Group (CFR): III
UN ID Number (CFR): UN# 2853
Shipping Name (IATA): Magnesium fluorosilicate
Hazard Class (IATA): 6.1
Additional Hazard Class (IATA): NA
Packaging Group (IATA): III
UN ID Number (IATA): UN# 2853
SECTION 15: Regulatory Information
TSCA: Listed in the TSCA inventory.
SARA (Title 313): Title compound not listed.
Second Ingredient: none
SECTION 16 - ADDITIONAL INFORMATION
N/A
