Arsenic

Arsenic (CAS 7440-38-2) is a metalloid element used where controlled introduction of element 33 into alloys, semiconductors, or catalytic systems is required.

Where is Arsenic used?

• Electronics manufacturing: dopant, alloying agent, and catalyst component
• Semiconductor fabrication: n-type dopant that modifies electrical conductivity in silicon and germanium wafers
• Metallurgy: additive in lead and copper alloys to improve hardness for battery grids and ammunition
• Compound semiconductors: primary feedstock for gallium arsenide wafers used in high-frequency and optoelectronic devices
• Heterogeneous catalysis: arsenic-containing compounds derived from elemental arsenic serve as precursor material for chemical synthesis.

Good to know: Semiconductor and compound semiconductor manufacturers typically require certified high-purity material meeting tightly controlled trace metal specifications.

Commercial specifications

• Purity grades range from technical to high-purity electronics-grade
• Standard commercial grades available for metallurgical use