Perlite

  • Crystalline silica
Formula
SiO2
Description
Odorless, light-gray to glassy-black solid.
Uses
Insulation, soilless plant growing mix, water filtration, abrasives, polishes.

Registry Numbers and Inventories.
CAS
93763-70-3
RTECS
SD5254000
RTECS class
Other
Beilstein/Gmelin
NA
Canada DSL/NDSL
DSL
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
O2Si
Melting point, °C
>1093
Density
2.2-2.4 g/cm3 (20 C)
Solubility in water
Slightly soluble.

Hazards and Protection.
Storage
Store in a cool, dry location.
Handling
Use only with adequate ventilation. Avoid dust generation. Maintain good housekeeping practices.
Protection
Wear protective gloves and clothing and safety goggles.
Respirators
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.
Small spills/leaks
Vacuum up or wet sweep. Avoid dust generation.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
None reported.

Fire.
Fire fighting
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.

Health.
Exposure limit(s)
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)
Exposure effects
Chronic exposure can aggravate existing upper respirator and lung diseases.
   Ingestion
Causes irritation.
   Inhalation
Causes irritation. Congestion may occur on overload.
   Skin
Causes irritation.
   Eyes
Causes irritation.

First aid
 
   Ingestion
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.
   Inhalation
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.
   Skin
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.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.