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Description:Appearance: Yellow to orange powder Purity: More than 99.9% Volaliles: Not more than 0.07% Water: Not more than 0.01% Absorptivity: At 400nm 1/mol. Cm not less than 7.8 ×1000 At 600nm 1/mol. Cm not less than 1.5 Metal content: Na ppb less than 100 K ppb less than 100 Fe ppb less than 100 Decomposition point: Not less than 132degrees Insoluble choloroform: Not more than 0.01% Impurity as sulfonic acid: Not more than0.02% Purpose:(1) sunshine for printing PS(2) for circuit board ray pastern Deposited: Low temperature, hibernation, dryness, fire-proof Packing: Steeliness barrel, inside is PE film, PB and plastic duplicate, black plastic film with three layers. Every barrel 10 Kg ×2( or up to the customer's demand)