Properties Typical Values
Appearance Clear uniform white granules free of
foreign matter
Assay as K2B4O7.4H2O 99.50 % min.
B2O3 45.10 % min.
K2O 30.30 % min.
Insoluble Matter 0.01 % max.
Chloride (Cl) 0.005 % max.
Sulphate (SO4) 0.02 % max.
Heavy Metals as Pb 0.005 % max.
Iron (Fe) 0.001 % max.
Calcium Magnesium Precipitate 0.01 % max.
Particle Size : +8 mesh 0.1 % max.
Particle Size : +30 mesh 1 % max.
Particle Size : +170 mesh 80 % min.