indigo blue dye powder 94%,vat blue 1,textile dyestuff

Products name

Indigo(C.I Vat Blue 1#)

constitutional formula

molecular formula

C16H10N2O2

molecular weight

262

nature

This product is dark-blue uniform powdery or granular. It cannot be dissolved in water and common organic solvents such as ethanol and aether, but can be dissolved in hot aniline and melt phthalic anhydride. Its melting point in the closed capillary is 390-392°C, and it begins sublimating slowly at 290°C. It has very good sunburn endurance and application performance.

test condition

HG/T 2750-1996

appearance

dark-blue uniform powder or granule

(1)original powder

content

%≥94.0

particbe size(60mesh)

%≥96.0

moisture

%≤1.0

Fe3+