Solvent Red 24 CAS# 85-83-6
Bright and Pure Color Performance: Provides vivid, bright red shades with high color purity for consistent coloring results.
Excellent Light Resistance: Offers good resistance to light, helping maintain color stability and durability over time.
Strong Oil Solubility: Oil-soluble formulation ensures effective dispersion in thermoplastics and other non-aqueous systems.
Versatile Application Range: Widely used for coloring thermoplastics, polyester fiber pulp, paints, and ballpoint pen inks.
Solvent Red 24 (CAS#85-83-6)
Solvent Red 24, also referred to as Sudan Red IV, oil-soluble red, or light red, is an azo dye chemically identified as 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol. Its molecular formula is C₂₄H₂₀N₄O, with a molecular weight of 380.44.
This product features strong light fastness along with a bright and pure red shade. It is widely used for coloring various thermoplastics and is also suitable for polyester fiber pulp, paints, and ballpoint pen inks.
| Product Name: | Solvent Red 24 |
| Synonyms: | 1-((2-Methyl-4-((2-methylphenyl)azo)phenyl)azo)-2-naphthalenol;1-((4-(o-tolylazo)-o-tolyl)azo)-2-naphtho;1-((E)-(2-Methyl-4-[(E)-(2-methylphenyl)diazenyl]phenyl)diazenyl)-2-naphth;1-(4-(o-Tolylazo)-o-tolylazo)-2-naphthol;1-(4-o-tolylazo-o-tolylazo)-2-naphthol;1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-2-naphthaleno;2',3-Dimethyl-4-(2-hydroxynaphthylazo)azobenzene;2’,3-dimethyl-4-(2-hydroxynaphthylazo)azobenzene |
| CAS: | 85-83-6 |
| MF: | C24H20N4O |
| MW: | 380.44 |
| EINECS: | 201-635-8 |
| Product Categories: | Solvents and Intermediates;Azo;Organics;Solvent Dyestuff;Aromatics;Intermediates & Fine Chemicals;Pharmaceuticals |
| Mol File: | 85-83-6.mol |
Solvent Red 24 Chemical Properties
| Melting point | 199 °C (dec.)(lit.) |
| Boiling point | 260°C |
| Density | 1.1946 (rough estimate) |
| Vapor pressure | 0Pa at 25℃ |
| Refractive index | 1.6000 (estimate) |
| Storage temp. | Flammables area |
| Solubility | Insoluble in water; soluble in benzene, methanol, acetone, isopropanol; slightly soluble in ethanol |
| Pka | 13.52±0.50(Predicted) |
| Colour Index | 26105 |
| Form | Powder/Solid |
| Color | Red Brown |
| Water Solubility | 23μg/L at 25℃ |
| ε(extinction coefficient) | ≥12000 at 356-360nm in toluene at 0.008g/L |
| ≥26000 at 519-523nm in toluene at 0.008g/L | |
| λmax | 520 nm, 357 nm |
| Merck | 148393 |
| BRN | 709018 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Biological Applications | Detecting atherosclerosis; diapers; skin care products; shampoos; hair colors; stents; dental impression materials |
| InChIKey | RCTGMCJBQGBLKT-PAMTUDGESA-N |
| LogP | 6.66 |
| IARC | 3 (Vol. 8, Sup 7) 1987 |
| NIST Chemistry Reference | O-tolylazo-o-tolylazo-beta-naphthol(85-83-6) |
| EPA Substance Registry System | C.I. Solvent Red 24 (85-83-6) |
Product Usage
Solvent Red 24 is suitable for coloring a wide range of thermoplastics, including polystyrene and polyvinyl chloride, providing plastic products with vibrant color and good light fastness. It is also applicable to polyester fiber pulp dyeing, producing bright shades with high color fastness, and is commonly used in textile and garment applications.
In addition, it serves as a common colorant in ink production, including printing inks and ballpoint pen inks. It is widely used in coatings and paints to impart rich color, strong hiding power, and good weather resistance. The product can also be applied to wax products, greases, and leather items, such as crayons and shoe polish.
Due to its toxicity, proper safety procedures must be strictly followed during handling and application. It is strictly prohibited for use in food, pharmaceutical products, or any applications involving direct human contact.
