- Crystalline silica
Odorless, light-gray to glassy-black solid.
Insulation, soilless plant growing mix, water filtration, abrasives, polishes.
Registry Numbers and Inventories.
Melting point, °C
2.2-2.4 g/cm3 (20 C)
Solubility in water
Hazards and Protection.
Store in a cool, dry location.
Use only with adequate ventilation. Avoid dust generation. Maintain good housekeeping practices.
Wear protective gloves and clothing and safety goggles.
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Vacuum up or wet sweep. Avoid dust generation.
Stable at normal temperatures and pressures.
Strong oxidizing agents.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
TLV: ppm; 10 mg/m3 (as TWA) (ACGIH 1995-1996). OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp) NIOSH REL: TWA 10 mg/m3 (total) WA 5 mg/m3 (resp)
Chronic exposure can aggravate existing upper respirator and lung diseases.
Causes irritation. Congestion may occur on overload.
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.