Polysilicon Powder - MEMC Electronic Materials, Inc.

Polysilicon PowderSECTION 10: STABILITY AND REACTIVITYChemical Stability:Conditions to Avoid:Incompatibility with Other Materials:Hazardous Decomposition, ReactionAnd Oxidation (other than burning)Products:Hazardous Polymerization:StableAvoid generation of airborne dusts. When heated,silicon will react with water to produce flammableand/or explosive hydrogen gas.Water, alkali metals, oxidizing agents, acids, basis,interhalogens, halogens.Not knownWill not occur.SECTION 11: TOXICOLOGICAL INFORMATIONRTECS Number:Acute Toxicity:Chronic and Subchronic Data:Special Studies:Suspected cancer agent:Irritancy of product:Sensitization of product:Reproductive toxicityinformation:Mutagenicity:Embryotoxicity:Teratogenicity:Reproductive Toxicity:VW0400000 (Silicon)Oral, LD50, 3160 mg/kg, ratElementary silicon is an inert material that seems to have littleadverse effect on lungs and does not appear to producesignificant organic disease or toxic effects when exposures arekept under reasonable control.None known to MEMC Pasadena, Inc.Silicon is not found on the following lists: FEDERAL OSHA ZLIST, IARC, NTP, and California and therefore is neitherconsidered to be nor suspected to be a cancer-causing agent bythese agencies.Silicon is irritating to respiratory system.Silicon is not known to be a sensitizer to humans uponprolonged or repeated contact.Listed below is information concerning the effects of Silicon onthe human reproductive system.No human mutagenic effects have been described for Silicon.No human embryotoxic effects have been described for Silicon.No human teratogenic effects have been described for Silicon.No human reproductive effects have been described for Silicon.Revised April 2010 4 of 5