| Product Identification | Back to Contents | 【Product Name】
Silicon dioxide | 【Synonyms】
Samd
Silicic anhydride
Silicon dioxide | 【CAS】
14808-60-7 | 【Formula】
O2Si | 【Molecular Weight】
60.08 | 【EINECS】
238-878-4 | 【RTECS】
VV7330000 | 【RTECS Class】
Tumorigen; Mutagen; Human Data | 【Beilstein/Gmelin】
13882 (G) |
| Physical and Chemical Properties | Back to Contents | 【Appearance】
Colorless, white or variable, black, purple, green crystals. | 【Solubility in water】
Insoluble | 【Melting Point】
1427 | 【Boiling Point】
2230 | 【Vapor Pressure】
10 at 1732 C | 【Density】
2.622 - 2.645 g/cm3 | 【Usage】
Used in mining, quarrying, tunnelling, foundries. Used in the fabrication of stone and clay products; the manufacture of glass, enamels, ceramic products and glazes; as an abrasive and grinding media. |
| First Aid Measures | Back to Contents | 【Ingestion】
Treat symptomatically and supportively. Get medical aid. | 【Inhalation】
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. | 【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. | 【Eyes】
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid. |
| Handling and Storage | Back to Contents | 【Storage】
Store in a dry area. | 【Handling】
Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid ingestion and inhalation. |
| Hazards Identification | Back to Contents | 【Inhalation】
Dust is irritating to the respiratory tract. | 【Skin】
Dust may cause mechanical irritation. | 【Eyes】
Dust may cause mechanical irritation. | 【Ingestion】
May cause irritation of the digestive tract. | 【EC Safety Phrase】
S 22 |
| Exposure Controls/Personal Protection | Back to Contents | 【Personal Protection】
Eyes: Wear dust goggles. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin. | 【Respirators】
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149. 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. | 【Exposure Effects】
Prolonged exposure to respirable crystalline quartz may cause delayed lung injury/fibrosis (silicosis). | 【Exposure limit(s)】
NIOSH REL: Ca TWA 0.05 mg/m3 See Appendix A NIOSH IDLH: Potential occupational carcinogen 25 mg/m3 (cristobalite, tridymite); 50 mg/m3 (quartz, tripoli) | 【Poison Class】
F (Not subject to toxicity classification) |
| Stability and Reactivity | Back to Contents | 【Incompatibilities】
Dissolves readily in hydrofluoric acid, forming silicon tetrafluoride, a corrosive gas. Reacts violently with powerful oxidizers such as chlorine trifluoride, manganese trifluoride, oxygen difluoride, vinyl acetate, and certain other fluorine-containing compounds. Will be attacked by strong alkalis. | 【Stability】
Stable under normal shipping and handling conditions. | 【Decomposition】
Irritating and toxic gases. |
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