Product Name: Sodium Metasilicate
Chemical Formula: Na₂SiO₃
CAS Number: 6834-92-0
Use of Substance: Industrial cleaning, detergent manufacturing, water treatment, pulp and paper processing
Supplier: Refer to product packaging or purchase documentation
Emergency Phone: Provided on shipment documents
Synonyms: Disodium metasilicate, water glass, sodium silicate
UN Number: 3253
GHS Classification: Corrosive to metals, Skin Irritation, Eye Damage
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage, may cause respiratory irritation. Harmful if swallowed.
Pictograms: Corrosion, exclamation mark
Precautionary Statements: Avoid contact with skin and eyes, do not breathe dust, wash hands thoroughly after handling, wear protective gloves and eye protection
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Target Organs: Respiratory tract, skin, eyes
Chemical Name: Sodium Metasilicate
Concentration (%): 100% (industrial grade, some formulations may be diluted)
Other Ingredients: None listed for pure product (impurities may occur, check batch certificate)
Molecular Weight: 122.06 g/mol
Inhalation: Move affected person to fresh air, seek medical attention if symptoms develop or persist, provide artificial respiration if necessary
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water for at least 15 minutes, get medical attention
Eye Contact: Immediately flush eyes with water for at least 15 minutes, hold eyelids open, remove contact lenses, seek medical advice
Ingestion: Rinse mouth, do not induce vomiting, drink water if conscious, get medical advice immediately
Notes for Physician: Treat symptoms, monitor for corrosive injury to oral cavity, esophagus, and respiratory tract
Suitable Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide
Specific Hazards: Not combustible, may produce toxic fumes if heated
Special Fire Fighting Procedures: Evacuate area, wear self-contained breathing apparatus and protective suit
Decomposition Products: Sodium oxides, silicon oxides
Flash Point: Not applicable
Explosion Data: Not explosive
Personal Precautions: Wear protective clothing, avoid breathing dust, ventilate area
Environmental Precautions: Prevent product from entering drains, sewers, surface and groundwater
Clean Up Methods: Sweep up and collect material for disposal, avoid creating dust, wash spill site with plenty of water
Containment: Use inert absorbent material if necessary
Handling: Avoid direct contact with skin and eyes, avoid inhaling dust, use only with adequate ventilation, wash hands after use
Storage: Store in cool, dry, well-ventilated area, keep container tightly closed, separate from acids, keep away from incompatible materials
Incompatibilities: Strong acids, ammonium salts, reactive metals
Occupational Exposure Limits: No specific OSHA PEL or ACGIH TLV for sodium metasilicate; general dust limits may apply
Engineering Controls: Local exhaust ventilation, process enclosure where possible
Personal Protective Equipment: Protective gloves (nitrile, PVC, neoprene), chemical-resistant goggles or face shield, protective clothing, respiratory protection if dust is present
Hygiene Measures: Wash thoroughly after handling, do not eat, drink, or smoke in work area
Appearance: White powder or granules
Odor: Odorless
pH: Strongly alkaline (11-13 for 1% solution)
Boiling Point: Not determined (decomposes before boiling)
Melting Point: Approximately 1088°C
Solubility: Soluble in water
Vapor Pressure: Not applicable (solid)
Density: 2.4 g/cm³
Evaporation Rate: Not applicable
Flash Point: Not flammable
Chemical Stability: Stable under recommended storage conditions
Incompatible Materials: Acids, ammonium salts, reactive metals such as aluminum, magnesium, zinc
Hazardous Reactions: Exothermic with acids, releases heat and forms gelatinous silica
Decomposition Products: Sodium oxides, silica, water vapor
Conditions to Avoid: Exposure to moisture, contact with incompatible materials
Acute Toxicity: Oral LD50 (rat): 847 mg/kg
Corrosive Effects: Causes burns to skin, eyes, and mucous membranes
Inhalation Effects: Irritation to respiratory system, coughing, difficulty breathing in severe cases
Chronic Effects: Prolonged or repeated skin contact can cause dermatitis
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Routes of Exposure: Eyes, skin, ingestion, inhalation
Other Health Effects: Permanent eye damage possible if contact is severe or prolonged
Aquatic Toxicity: Harmful to aquatic life due to high alkalinity, LC50 (fish, 96 hr): approx. 210 mg/L
Persistence and Degradability: Inorganic, does not undergo biological degradation
Bioaccumulative Potential: Low, does not bioaccumulate
Mobility in Soil: High solubility, may affect groundwater if not controlled
Other Adverse Effects: Raises pH of water bodies, impacts aquatic organisms
Waste Disposal: Dispose of according to local, regional, and national regulations
Methods: DILUTE in large amounts of water to neutralize pH, ship to approved waste disposal facility
Packaging Disposal: Rinse containers before recycling or disposal, follow all applicable laws
Precautions: Do not dispose in natural waterways, avoid dust generation during waste handling
UN Number: 3253
Proper Shipping Name: Disodium trioxosilicate
Class: 8 (Corrosive substances)
Packing Group: II
Labels: Corrosive
Special Precautions: Avoid releasing to environment during transport, ensure packaging integrity
Transport Regulations: Comply with regulations for road, rail, maritime, and air transport
US Regulations: OSHA Hazard Communication Standard: Corrosive, All ingredients listed on TSCA Inventory
EU Regulations: Classified as hazardous under Regulation (EC) No 1272/2008 (CLP), subject to workplace safety directives
Other Regulations: Follow local, state, federal, and international laws regarding handling, labeling, transportation, and disposal
Label Elements: GHS pictograms, hazard and precaution statements must appear on containers
