Sodium cacodylate trihydrate (DG)

Sodium dimethyl arsenate. Cacodylic acid-sodium salt. 

Buffer for EM.
Toxic and carcinogenic; use gloves and fumehood.

C₂H₆AsNaO₂^.3H₂O   F.W. 214.02   CAS #124-65-2

Certificate of Analysis:

Identity: Conforming
Appearance: Small Crystals
Colour: White
Odour: None
Aqueous solution (2g 10mL): Colourless
Assay: % 99.52
Loss on drying: % 25.39
Chlorides: % 0.0050
Sulphates: % 0.0150
Inorganic Arsenic: % 0.0030

SDS