Sodum bisulphite appears as white crystals or crystalline powder. Slight sulphurous odor. Specific gravity 1.48.
Chemically, sodium bisulfite is a combination of sodium, hydrogen, sulfur and oxygen.
It is also called sodium hydrogen sulfite, and is classed as a sulfite, or sulfur-based chemical.
Its natural form is a white crystalline powder, but turns yellow in solution.