What is Orange I CAS 523-44-4?
Orange I CAS 523-44-4 is an organic azo dye formulated as a water-soluble monosodium salt. Typically supplied as a red to very dark red crystalline solid, it dissolves in water to yield a distinct palm-light orange solution. It is manufactured through the precise diazo coupling of 4-aminobenzenesulfonic acid with naphthalen-1-ol. Known for its strong material affinity and distinct chemical reactivity, it serves as a highly reliable industrial colorant for natural protein fibers and a dependable analytical indicator in scientific laboratories.
Specifications
| Item |
Value |
| Appearance |
Red to very dark red crystalline solid |
| Melting Point |
260 °C (Decomposes) |
| Storage Conditions |
Room temperature, inert atmosphere |
Features
- Brilliant Orange Pigmentation – Delivers a high-strength, consistent palm-light orange shade, optimizing visual payoff and ensuring deep, even dye penetration into target substrates.
- Predictable Chemical Reactivity – Exhibits distinct visual color shifts in extreme pH and chemical environments, turning purple in concentrated sulfuric acid and red in sodium hydroxide.
- Good Aqueous Solubility – Readily dissolves in water and is slightly soluble in ethanol and methanol, allowing for smooth integration into aqueous dye baths and diagnostic liquid solutions.
Applications
- Textile Dyeing – Extensively utilized in the commercial textile industry for the high-quality, even dyeing of natural protein fibers, particularly wool and silk.
- Leather Processing – Applied broadly in the leather tanning and coloring industry to provide durable, aesthetically pleasing orange to reddish-orange shading.
- Analytical & Diagnostic Research – Serves as a highly dependable chemical indicator in specialized laboratory settings and specific biochemical titration processes.
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.
