Specification Sheet
Product Name Sodium fluoride,
ACS reagent, ≥99%
Product Number S6521
Product Brand SIGMA
CAS Number 7681-49-4
Molecular Weight 41.99
 
TEST SPECIFICATION
APPEARANCE WHITE TO WHITE WITH A FAINT YELLOW CAST POWDER
ASSAY NLT 99%
INSOLUBLE MATTER NMT 0.02%
LOSS ON DRYING AT 150 DEG CENTIGRADE NMT 0.3%
CHLORIDE (CL) NMT 0.005%
TITRATABLE ACID NMT 0.03 MEQ/G
TITRATABLE BASE NMT 0.01 MEQ/G
SODIUM FLUOSILICATE (NA2SIF6) NMT 0.1%
SULFATE (SO4) NMT 0.03%
SULFITE (SO3) NMT 0.005%
HEAVY METALS (AS LEAD) NMT 0.003%
IRON (FE) NMT 0.003%
POTASSIUM (K) NMT 0.02%
SHELF LIFE SOP 10-30-5497 2 YEARS
DOCUMENT # S6521/05/30/96/1