What is Acid Orange 7 CAS 633-96-5?
Acid Orange 7 CAS 633-96-5 is an azo dye belonging to the naphthalene class, manufactured through the azo coupling of β-naphthol and the diazonium derivative of sulfanilic acid. Typically supplied as an orange-red or golden yellow crystalline powder, it dissolves exceptionally well in water to form a vibrant red-light yellow solution. Its robust tinting strength and distinct pH-dependent color transitions make it an indispensable colorant for a diverse array of commercial, industrial, and biological applications.
Specifications
| Item |
Value |
| Appearance |
Orange-red crystalline powder |
| Density |
1.525 g/cm3 (at 20 °C) |
| Melting Point |
164 °C |
| pH Range |
Amber (7.4) to orange (8.6); Orange (10.2) to red (11.8) |
| Solubility |
Very soluble in water (116 g/L at 30 °C); slightly soluble in ethanol |
| Storage Conditions |
Amber vial, -20 °C freezer, under inert atmosphere |
Features
- Excellent Aqueous Solubility – Dissolves readily and uniformly in water, facilitating smooth and consistent dyeing processes in aqueous environments.
- Dynamic pH Sensitivity – Functions effectively as a reliable pH indicator, exhibiting distinct visual transitions from amber to orange and orange to red across different pH thresholds.
- Broad Material Compatibility – Highly compatible with natural protein fibers and organic materials, displaying strong, vivid pigmentation with excellent discharge properties.
Applications
- Textile & Leather Dyeing – Broadly applied for dyeing wool, silk, and polyamide fibers, as well as for direct printing and coloring leather and paper products.
- Cosmetics & Personal Care – Functions as a safe and effective colorant in commercial cosmetics, hair dyes, and advanced wound dressing materials.
- Advanced Materials & Biochemicals – Utilized in the development of organic light-emitting diodes (OLEDs), specialized inks, biological shading techniques, and nanoparticle research.
Packaging
Mikem offers flexible packaging options, including 25 kg of fiber drums for liquid products and 15–25 kg PP/PE bags for powder products, all customizable to meet your specific needs.
