Item
Specifications
APPEARANCE
WHITE FLAKES OR
CRYSTALLINE
POWDER
MOLTEN COLOUR
(PT-CO)
≤20
HEAT COLOUR
≤50
SULPHURIC ACID COLOUR
≤60
PURITY/%
≥99.50
CRYSTALLIZATION
POINT ℃
≥130.5
FREE ACID /%
≤0.20
Phthalic anhydride
