Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Silica(7631-86-9)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Silica
Synonyms
Cristobalite
Dioxosilane
Infusorial earth
Quartz
Sand
Silic anhydride
CAS
7631-86-9
Formula
O2Si
Molecular Weight
60.09
EINECS
231-545-4
RTECS
VV7565000
RTECS Class
Other
Merck
12,8637
Beilstein/Gmelin
9357 (G)

Physical and Chemical Properties

Appearance
Transparent crystals or amorphous powder. Odorless.
Solubility in water
Insoluble
Melting Point
1719
Boiling Point
2230
Density
2.2 g/cm3 (20 C)
Usage
Manufacture glass, water glass, refractories, abrasives, ceramics, enamels, in scouring-& grinding-compd, ferrosilicon, molds for castings, decolorizing & purifying oils, petroleum products, etc.
Refractive Index
1.193

First Aid Measures

Ingestion
Never give anything by mouth to an unconscious person. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. If irritation develops, get medical aid.

Handling and Storage

Storage
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Inhalation
May cause respiratory tract irritation. May cause lung damage. Contains crystalline silica which may lead to respiratory abnormalities and silicosis.
Skin
May cause skin irritation.
Eyes
May cause eye irritation.
Ingestion
May cause digestive tract disturbances.
EC Risk Phrase
R 40 37
EC Safety Phrase
S 22 36/37

Exposure Controls/Personal Protection

Personal Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Exposure Effects
Prolonged exposure to respirable crystalline quartz may cause delayed lung injury/fibrosis (silicosis).
Exposure limit(s)
IDHL: 3000 mg/m3
Poison Class
-

Fire Fighting Measures

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. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire Potential
Nonflammable.

Accidental Release Measures

Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code
14
Incompatibilities
Magnesium.
Stability
Stable under normal temperatures and pressures.
Decomposition
Irritating and toxic fumes and gases.

Transport Information

HS Code
2811 22 00
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