Silicon (powder, amorphous)

CAS 7440-21-3 Si MW 28.1000 Danger
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Hazard Statements

CodeStatementHazard Class
H228 Flammable solid Flammable solids
H320 Causes eye irritation Serious eye damage/eye irritation

Precautionary Statements

CodeStatement
P210 Keep away from heat, hot surface, sparks, open flames and other ignition sources. No smoking.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/.../] equipment.
P264+P265 Wash hands [and ...] thoroughly after handling. Do not touch eyes.
P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do - continue rinsing.
P337+P317 If eye irritation persists: Get medical help.
P370+P378 In case of fire: Use ... to extinguish.

Physical Properties

Black to gray, lustrous, needle-like crystals.

Boiling Point4271°F
Vapor Pressure0 mmHg (approx)
Specific Gravity2.33 at 77°F

Target Organs

Lungs Skin Eyes

eye, skin, and mucous membrane irritation; respiratory effects

Synonyms

elemental silicon

Data Sources

Disclaimer: This information is compiled from public regulatory databases for reference only. It does not replace the manufacturer's Safety Data Sheet (SDS). Always consult the official SDS for your specific product before handling chemicals.

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