Polysilicon Powder - MEMC Electronic Materials, Inc.

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Polysilicon PowderSECTION 4: FIRST AID MEASURESInhalation:Remove to fresh air. If breathing is difficult, give oxygenand seek medical attention.Eye Contact: Flush with copious amounts of water for at least 15minutes. If irritation persists, seek medical attention.Skin Contact:Ingestion::Remove contaminated clothing. Wash affected area withsoap and water. Rinse thoroughly. If irritation persists orother symptoms are observed, seek medical advice.Rinse out mouth and drink copious amounts of water. Incase of irritation or other symptoms, seek medicalattention.SECTION 5: FIRE FIGHTING MEASURESFlammability Classification(Per 49 CFR Part 173 Subpart D):Known or Anticipated HazardousProducts of Combustion:Extinguishing Media:Fire Fighting Instructions:Material is not flammable according to definition of aflammable solid in 49 CFR, Part 173, Subpart D.None listedDry chemical or carbon dioxide. In general, water basedextinguishing media should not be used for this materialUse firefighting measures which suit the environment andtake into account other materials which may be involved.Wear self-contained breathing apparatus and protectiveclothing.SECTION 6: ACCIDENTAL RELEASE MEASURESPersonnel Protection:Environmental Protection:Cleanup/Collection:Wear protective equipment including rubber gloves andeye protection. Ensure adequate ventilation. Keepunprotected personnel away.Take precautions to ensure material does not contaminatethe ground or enter the drainage system.Ensure adequate ventilation. Avoid raising dust. Transfermaterial to sealed containers for disposal.Revised April 2010 2 of 5
Polysilicon PowderSECTION 7: HANDLING AND STORAGEHandling:Storage:Avoid contact with eyes, skin and clothing. Avoidgeneration of dust. Keep containers tightly sealed.Store in a cool, dry location away from heat, sparks, andopen flame. Do not store with oxidizing agents, halogensor acids.SECTION 8: EXPOSURE CONTROL/PERSONAL PROTECTIONVentilation and Engineering Controls::Respiratory Protection::Eye Protection:Hand Protection:Body Protection:General Hygiene Measures:Material transfer and dust collection equipment shouldbe constructed of conductive materials and electricallyinterconnected (bonded) and grounded. Use generalor local exhaust ventilation if necessary.Wear NIOSH (U.S.) or CEN (EU) approved dustrespirator.Splash goggles or safety glasses.Not required.Use body protection appropriate for task. An apron orother impermeable body protection is suggested.Keep away from foodstuffs, beverages and feed.Remove all soiled/contaminated clothing immediately.Wash hands before breaks and at the end of work.Avoid contact with eyes and skin.SECTION 9: PHYSICAL AND CHEMICAL PROPERTIESAppearanceDark grey to black powderOdor:OdorlessPhysical state at atmospheric conditions: SolidpH:Not applicableSublimation Temperature (at 1 atm): Not determinedSolubility in Water:InsolubleMelting Point: 1410° C (2750° F)Boiling Point: 2355° C (4271° F)Specific gravity/Density: 2.39 g/cm 3 at 20° C (68° F)Molecular Weight:28.09 AMUFlammability:Dust clouds may be explosiveFlash Point:Not applicableFlammability Limits in Air:Not applicableAuto Ignition Temperature: 754° C (1390° F)Revised April 2010 3 of 5
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