Production
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Solvent blue 35
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Ultraviolet absorber 531
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Sodium Alpha-olefin Sulfonate
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Solvent blue 104
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Solvent Yellow 98
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Acid Yellow 23 Detergent dye
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Acid Red 52
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COSMETIC GRADE TITANIUM DIOXIDE AMA99
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Sodium Lauryl Ether Sulfate 70% (SLES AES)
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zeolite 4A
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Pigment red 122
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Solvent Orange 60
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Solvent Red 179
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Pigment orange 34
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Solvent Orange 63
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Fiber Flame Retardant Masterbatch
Acid Orange 7
Product Name: Acid Orange 7 / Acid Orange II
Chemical Name: Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulfonate
Color Index: Acid Orange 7 (C.I. 15510)
CAS: 633-96-5
Molecular formula: C16H11N2NaO4S
Formula Weight: 350.32 g/mol
Synonyms: Acid Orange II; Betanaphthol Orange; Tropaeolin OO2; C.I. 15510; 2-Naphthol Orange
Application:
Acid Orange 7 is widely used in wool, Silk, Nylon (Polyamide), Leather, Paper, Printing Inks, and specific Aluminum Surface Coloring (Anodizing).
Description
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1.Product Description
Discover the Legacy of Brilliance with Acid Orange 7.
Acid Orange 7 stands as the quintessential monoazo dye for the textile and leather industries, renowned for delivering a brilliant, fiery orange hue with exceptional build-up and levelling properties. Unlike complex metal-complex dyes, this vibrant powder offers a "true" orange tone (often described as Golden Orange or Rich Mandarin) that is ideal for creating bright solids or as a primary component for brown and scarlet compound shades.
In the modern dye house, Acid Orange 7 is celebrated for its high solubility and rapid diffusion rate, ensuring consistent penetration on challenging substrates like woven nylon and dense wool tops. Its chemistry allows for excellent migration, making it the preferred choice for level dyeing where uniformity is non-negotiable. Beyond textiles, this grade is also engineered for the leather finishing industry, where its intense clarity enhances the natural grain of aniline leathers without masking texture.
2.Product Specifications (Technical Data Sheet)
| Property | Specification | Insight |
| Product name | Acid Orange 7 (Acid Orange II) | Industry standard for brilliant orange shades. |
| Appearance | Bright Orange to Reddish-Brown Uniform Powder | Free-flowing, micronized to prevent dusting and caking. |
| CAS No. | 633-96-5 | Verified for global regulatory compliance. |
| EINECS | 211-199-0 | Listed in the European Inventory of Existing Commercial Substances. |
| Solubility | ≥ 70 g/L (Water, 25°C) | Excellent cold-water solubility; dissolves instantly without vigorous stirring. |
| Style | Anionic / Acid Dye | Suitable for application in acidic to neutral dye baths. |
| Tinting Strength | 100% ± 3% (vs. Standard) | High concentration ensures cost-effectiveness and lower dosage rates. |
| Purity (HPLC) | ≥ 99% | Minimal salt by-products; low impurity profile for consistent results. |
| Packing | 25 kg HDPE bags / 500 kg jumbo bags / Customizable inner liner options. | Secure packaging with moisture-proof lining to maintain shelf life. |
| Melting Point | > 300°C (Decomposes) | High thermal stability suitable for high-temperature dyeing processes. |
| Application | Wool, Nylon 6, Nylon 66, Silk, Leather, Paper Pulp. | Versatile across protein and polyamide fibers. |
3.Product Application (Industry Usage Guide)
Textile Industry (Wool & Nylon):
Acid Orange 7 is primarily applied via exhaust dyeing, winch, and package dyeing methods. It is conducted in a pH range of 4.0 - 6.0 (acetic or sulfuric acid) to maximize exhaustion. Due to its excellent migration index, it is frequently used in combination with acetic acid and Glauber's salt to achieve uniform pastel shades, effectively covering barre effects on nylon.
Leather Finishing:
In leather applications, this product is utilized as a spray dye or drum dye for finished leathers and wet-blue stocks. It offers deep penetration while maintaining the natural "pull-up" effect on aniline leathers. The result is a vivid, light-fast orange that does not crack or plate out during the finishing process.
Inks & Specialties:
Beyond fibers, it serves as a colorant for water-based inks, wood stains, and even anodized aluminum, where its sulfonate group forms a stable bond with the oxidized metal surface.
4.Features (Why Choose Our Acid Orange 7?)
Superior Migration & Levelling: Engineered with a controlled particle size distribution to prevent rapid strike; allows dyes to migrate slowly for the perfect uniform finish, even on tightly twisted yarns.
High Purity Formulation: Our unique spray-drying process results in low dust and low salt content, reducing effluent load and ensuring a safer working environment compared to standard grade powders.
pH Versatility: Maintains stable color value across a wide pH range (3.0 - 7.0), offering dyers flexibility in process adjustments without risking shade change.
Bleed Fastness Optimization: Specifically refined for leather to minimize "wet crocking" and bleeding in finished leather goods when exposed to moisture.
Eco-Conscious Profile: Manufactured in compliance with modern wastewater treatment standards; free from restricted aryl amines (non-carcinogenic base).
5.Packaging
Usually is 25Kg/cardboard drum or paper box or bag with inner double PE liner Or provide customized packaging according to customer requirements.
6.Our advantage:
1) Provide free samples for testing or comparing the effect difference and cost performance.
2) Fast response speed, customers' questions at any time will be responded to in two hours.
3) Fast delivery: the fastest delivery can be made on the same day.
4)Different packaging solutions: provide various packaging options according to customer requirements.
5)Technical guidance: provide improved whitening and coloring formulas and guidance according to customer production materials.
6) Sample retention or sample mailing before bulk delivery.
7) Providing certificationes, such as Reach certification.
8) Different payment methods: TT LC, etc.
9) Providing door-to-door DDP service.
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