POTASSIUM FLUOROSILICATE

SYNONYM: POTASSIUM SILICOFLUORIDE; POTASSIUM HEXAFLUOROSILICATE;

DIPOTASSIUM HEXAFLUOROSILICATE

FORMULA: K₂SiF₆

M. W. : 220.2564

CAS NO.: 16871-90-2

GRADE: TECH. GRADE

DESCRIPTION: COLORLESS, ODORLESS, POISONOUS AND HYGROSCOPIC. THE SPECIFIC GRAVITY OF HEXA-SQUARE CRYSTAL IS 3.08 AND THE SPECIFIC GRAVITY OF CUBIC CRYSTAL IS 2.665(170℃). SOLUBILITY IN ACID IS LARGER THAN IN WATER. DECOMPOSED AS POTASSIUM FLUORIDE, SILICIC ACID AND HYDROGEN FLUORIDE WHEN IT BURNED.

SPECIFICATIONS:

ITEM	EXCELLENT	FIRST	QUALIFIED
LOSS ON DRY 105℃	0.30%MAX.	0.40%MAX.	0.60%MAX.
ASSAY (DRY BASIS)	98.5%MIN.	98.0%MIN.	97.0%MIN.
FREE-ACID (HCL)	0.15%MAX.	0.15%MAX.	0.15%MAX.
WATER-INSOLUBLE	0.40%MAX.	0.50%MAX.	1.00%MAX.
Fe	0.02%MAX.
Pb	0.02%MAX.	0.05%MAX.	0.05%MAX.
FINESS (THROUGH 250um TEST SIEVE)	90%MIN.	90%MIN.	90%MIN.

USES: IT IS CAN BE USED AS ANTISEPTIC OF WOOD, ASSISTANT REAGENT IN MAGNESIUM AND ALUMINIUM SMELTED, PORCELAIN ENAMEL AND MICA SYNTHESIZATION.

PACKING: PACKED IN 25KG/50KG WOVEN BAG WITH PE LINNER.

UN NO.: 2674 CLASS: 6.1