PHYSICAL STATE; APPEARANCE: COLOURLESS, WHITE OR VARIABLE BLACK, PURPLE, GREEN CRYSTALS
PHYSICAL DANGERS:
CHEMICAL DANGERS: Reacts with strong oxidants causing fire and explosion hazard.
OCCUPATIONAL EXPOSURE LIMITS: TLV: (respirable fraction) 0.025 mg/m3; A2 (suspected human carcinogen); (ACGIH 2006). MAK: Carcinogen category: I (DFG 2005). OSHA PEL:See Appendix C (Mineral Dusts) NIOSH REL: Ca TWA 0.05 mg/m3 See Appendix A NIOSH IDLH: Ca 25 mg/m3 (cristobalite, tridymite); 50 mg/m3 (quartz, tripoli) See: 14808607
| ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation.
INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.
EFFECTS OF SHORT-TERM EXPOSURE:
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the lungs , resulting in fibrosis (silicosis). This substance is carcinogenic to humans. |