Black bean red
Product Description:Black purple amorphous powder.Soluble in water and ethanol the aqueous solution is transparent.Not soluble in anhydrous ethanol, acetone, ether and grease.In the acidic aqueous solution is transparent bright red, in neutral aqueous solution is transparent red brown, in alkaline aqueous solution is transparent red brown. In iron, lead ion become brown. The more stable to heat. Partial acid conditions light fastness is strong.
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