... ,SGS,BV certified. 3)Appearance: Blue sky granular or powder 4)Package:25kgs/bag ... 284g/cm3. Properties: Sky blue crystal granular or power,can soluble in water and diluted acetic ... mordant, agricultural pesticides, fungicides, and for water treatment. As a mordant for cotton and silk; ... blue pigment; used as insectucude, bactericide for water, antiseptics for wood, catalyst for tannage, electrocopper ...