International Chemical Safety Cards SODIUM METASILICATE, ANHYDROUS ICSC: 0359 SODIUM METASILICATE, ANHYDROUS Silicic acid, sodium salt Na2SiO3 Molecular mass: 122.1 CAS # 6834-92-0 RTECS # VV9275000 ICSC # 0359 UN # 1759 TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: all extinguishing agents allowed. EXPLOSION In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.   EXPOSURE PREVENT DISPERSION OF DUST! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! INHALATION Burning sensation. Cough. Shortness of breath. Local exhaust or breathing protection. Fresh air, rest. Half-upright position. Artificial respiration if indicated. Refer for medical attention. SKIN Redness. Pain. Blisters. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention. Wear protective gloves when administering first aid. EYES Redness. Pain. Severe deep burns. Face shield or eye protection in combination with breathing protection if powder. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor. INGESTION Burning sensation. Shock or collapse. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into plasticcontainers; if appropriate, moisten first to prevent dusting. Cautiously neutralize remainder with dilute acid (preferably acetic acid). Then wash away with plenty of water (extra personal protection: complete protective clothing including self-contained breathing apparatus). Separated from strong acids, food and feedstuffs, metals. Dry (see Notes). Do not transport with food and feedstuffs. UN Hazard Class: 8 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 0359 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards SODIUM METASILICATE, ANHYDROUS ICSC: 0359 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: VITREOUS LUMPS OR WHITE TO GREEN POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance is a strong base, it reacts violently with acid and is corrosive in moist air to metals like zinc, aluminum, tin and lead forming a flammable/explosive gas (hydrogen- see ICSC # 0001). OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV not established. PDK not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly. EFFECTS OF SHORT-TERM EXPOSURE: Corrosive. The substance is very corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of an aerosol of the substance may cause lung oedema (see Notes). EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Melting point: 1088°C Relative density (water = 1): 2.6 Solubility in water: good

ENVIRONMENTAL DATA
N O T E S
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered. NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water. Store in an area having corrosion resistant concrete floor. Transport Emergency Card: TEC (R)-80G13

ADDITIONAL INFORMATION
ICSC: 0359 SODIUM METASILICATE, ANHYDROUS © IPCS, CEC, 1993

IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.