Vat Dye

Indigo Blue[ Molecular Formula ] : C16H10N2O2[ Colour Index ] : C.I. Vat Blue 1[Cas No]. 482-89-3[ Composion ] : Phenylethane acid potassium salt reacts to amino sodium through alkali fusion, and then oxidized.[Appearance]: Dark blue even Granular...

INDIGO BLUEGranularQuality index:AppearanceHomogenic dark blue powderColour lightSimilar as the standard sampleContent≥ 92.0%,93.0%Moisture content≤ 1.0%StrengthEqual to 100 percent of the standard samplePH value9.5-10.5Content of ferric...