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