|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Silicon | CAS 7440-21-3 | ||
| Si | RTECS VW0400000 | ||
|
Synonyms & Trade Names Elemental silicon [Note: Does not occur free in nature, but is found in silicon dioxide (silica) & in various silicates.] |
DOT ID & Guide 1346 170 (amorphous powder) |
||
|
Exposure Limits |
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp) | ||
| OSHA PEL�: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp) | |||
| IDLH N.D. | Conversion | ||
|
Physical Description Black to gray, lustrous, needle-like crystals. [Note: The amorphous form is a dark-brown powder.] |
|||
|
MW: 28.1 |
BP: 4271°F |
MLT: 2570°F |
Sol: Insoluble |
|
VP: 0 mmHg (approx) |
IP: NA |
|
Sp.Gr(77°F): 2.33 |
|
Fl.P: NA |
UEL: NA |
LEL: NA |
MEC: 160 g/m3 |
| Combustible Solid in powder form. | |||
|
Incompatibilities & Reactivities Chlorine, fluorine, oxidizers, calcium, cesium carbide, alkaline carbonates |
|||
|
Measurement Methods NIOSH 0500, 0600 |
|
Personal Protection & Sanitation Skin: No recommendation Eyes: Prevent eye contact Wash skin: No recommendation Remove: No recommendation Change: No recommendation |
First Aid (See procedures) Eye: Irrigate immediately Breathing: Fresh air Swallow: Medical attention immediately |
| Respirator Recommendations To be added later | |
| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, skin, upper respiratory system; cough | |
|
Target Organs
Eyes, skin, respiratory system |
|
| See also: INTRODUCTION |