phthalocyanine blue data table phthalocyanine blue product data type The formula c32h16cun8 c.i. genus name pigment blue 15 ( bgs15:3 ) ( pigment violet23 )Object - like powder CAS number 147-14-8 The melting point of 600 degrees centigrade Color dark heavy physical characteristicsWater ( 105 plus or minus 2 degrees centigrade ) is 1 Oil absorption 32-39 ( 9/100g ) Acid sealed values ( ph ) 7.5-9.0Free sulfur is 0.05 Characteristics of heat - resistant 250 degrees centigrade Weather 8 The dispersion of merit Effect of High Tinting strength of 100 3Introduction to the phthalocyanine blue BGS metal - free phthalocyanine blue, superior stain is not a metal - containing species, the brilliant green light blue rod - like crystal. Flocculation in some of the links appear.Insoluble in water, alcohol and hydrocarbons, dissolved in concentrated sulfuric acid?