High Quality Direct Red 83 Textile Dye - China Suppliers & Factory for Premium Coloring Solutions
Core Physical and Chemical Properties
Water Solubility
Solvent Solubility
Acid-Base Reaction Identification
- Concentrated hydrochloric acid: Produces jujube red precipitate
- Concentrated NaOH: Produces wine red precipitate
- Concentrated sulfuric acid: Appears purplish black, turns orange to reddish brown after dilution.
Stability
Frequently Asked Questions (FAQ)
Direct Red 83 is highly soluble in water, forming a magenta or bluish red aqueous solution. The optimal temperature for dissolving it is between 25–60℃ under neutral pH conditions (pH 6–8).
It is soluble in ethanol (producing a light purple solution) and ethylene glycol ethyl ether. It is slightly soluble in acetone, but completely insoluble in non-polar solvents such as benzene and chloroform.
When mixed with concentrated hydrochloric acid, it forms a jujube red precipitate. With concentrated sulfuric acid, it appears purplish black, which then turns orange to reddish brown upon dilution.
Reacting Direct Red 83 with concentrated sodium hydroxide (NaOH) produces a characteristic wine red precipitate.
Yes, as a copper complex direct dye, Direct Red 83 offers superior light fastness compared to standard direct dyes.
Its shade remains almost unchanged when encountering iron ions, but it becomes slightly bluer and darker in the presence of copper ions.