Solvent Red 111 is a high-performance oil-soluble dye widely used for coloring plastics, fuels, waxes, inks, and hydrocarbon-based products. Known for its intense deep red to bluish-red hue, Solvent Red 111 delivers excellent tint strength, transparency, and thermal stability in nonpolar systems.
Solvent Red 111 belongs to the azo dye chemical family. Azo dyes are characterized by the presence of one or more azo groups (–N=N–) linking aromatic rings. This structure provides strong chromophoric properties, resulting in vivid coloration and good resistance to light and heat in properly stabilized formulations.
Solvent Red 111 is classified as a nonpolar solvent dye, meaning it dissolves readily in organic solvents but is insoluble in water.
Soluble in:
Aromatic hydrocarbons (toluene, xylene)
Aliphatic hydrocarbons (mineral spirits, hexane)
Chlorinated solvents
Oils and fuels (diesel, gasoline)
Paraffin wax and microcrystalline wax
Certain plasticizers and monomers (styrene, MMA)
Limited or Partial Solubility in:
Ketones (depending on polarity and temperature)
Esters
Glycol ethers (varies by structure)
Insoluble in:
Water
Highly polar aqueous systems
Fuel marking and dyeing
Candle and wax coloring
Plastic coloration (polystyrene, ABS, PVC plastisols)
Printing inks
Lubricants and petroleum products