sodium hydrogen sulfite
reagent grade, granular
HAZARD ALERT: Severe irritant to skin and tissue as an aqueous solution; slightly toxic. LD50 2000 mg/kg.
Storage: Inorganic #2
Shelf Life: Substance very hygroscopic; keep tightly capped and in a cool location; store in a Flinn Chem-Saf™ Bag.
Odor: Faint sulfur.
CAS No. 7631-90-5
Technical Note: Sodium bisulfite is a mixture of sodium bisulfite and sodium metabisulfite, depending on the amount of hydration that has occurred.
Flinn Catalog/Reference Manual Page 133
Flinn Middle School Catalog/Reference Manual Page 78