CL Vat Scarlet 2R (cis-form)
Struct.:

Physicochemical Properties: dark red powder; insoluble in water and usual organic solvents; dark red when dissolved in concentrated sulfuric acid; blue solution when reduced by alkaline sodium hydrosulfite solution; dark brownish red when cotton fiber is dyed with it; good color shielding; an be organic pigment after processing.

Appearance: Dark red powdery mixture
Color: close to standard sample
Color fastness: 100% of standard sample
Dispersiveness: grade 3 & above (droplet test on filter paper)