Arsenic (As) Metal

Arsenic appears in three allotropic forms: yellow, black and grey; the stable form is a silver-gray, brittle crystalline solid.　It tarnishes rapidly in air, and at high temperatures burns forming a white cloud of arsenic trioxide.The metallic form is brittle, tharnishes and when heated it rapidly oxidizes to arsenic trioxide, which has a garlic odor. The non metallic form is less reactive but will dissolve when heated with strong oxidizing acids and alkalis.

Basic Information:

Arsenic (As) Metals 

Purity--- 99.99%(Ag,Al,Ca,Cu,Fe,Mg,Ni,Pb,Zn,Se,Cr,Sb,S total <100ppm),

                  99.999%(Ag,Al,Ca,Cu,Fe,Mg,Ni,Pb,Zn,Se,Sb,S,Cr,C total <10ppm),

                  99.9999% (Ag,Al,Ca,Cu,Fe,Mg,Ni,Pb,Zn,Se,C total <1ppm)  

Shape--- Gray white, lustrous, no black film on surface, Chunk or bar crystal, 

Application --- High pure alloy, thermoelectric refrigeration materials, photoelectric materials, microwave materials, dopant for semiconductors (Si, Ge), solder, GaAs and some III-V family compound semiconductors, etc.