7440-21-3 Silicon

Name: Silicon
Synonyms: 4FY;Aldrich 267414-25G; Biosilicon; CZ-N Polished wafer; FEB 450D; GKO 3516A; HGH600; Hexsil; JT 02; KDB 0.1; KDB 0.5; KDB 10; KDB 20; KR 1; Metasilicon 325A; PHC20; Polysilicon; SI 1059; SILSO; Sharp 80W; Si(100) wafer; Sicomill 4C-P;Sicomill Grade 2; Silgrain; Silgrain HQ; Silgrain Standard; Silicon 100;Silicon element
CAS Number:7440-21-3
Molecular Formula:Si
Molecular Weight:28.08
EINECS:231-130-8
Density:2.33
Boiling Point:2355 ºC
Flash Point:°C
Safety Description:A nuisance dust. Moderately toxic by ingestion. An eye irritant. Does not occur freely in nature, but is found as silicon dioxide (silica) and as various silicates. Elemental Si is flammable when exposed to flame or by chemical reaction with oxidizers. Violent reactions with alkali carbonates, oxidants, (Al + PbO), Ca, Cs₂C₂, Cl₂, CoF₂, F₂, IF₅, MnF₃, Rb₂C₂, FNO, AgF, NaK alloy. When heated it will react with water or steam to produce H₂; can react with oxidizing materials. See also SILICA, AMORPHOUS FUME; SILICA, AMORPHOUS FUMED; SILICA, AMORPHOUS HYDRATED; SILICA, CRYSTALLINE; SILICA, CRYSTALLINE–CRISTOBALITE; SILICA, CRYSTALLINE–QUARTZ; SILICA, CRYSTALLINE–TRIDYMITE; SILICA FLOUR; SILICA, FUSED; SILICA, GEL and AMORPHOUS–PRECIPITATED, SILICATES, and POWDERED METALS.
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