We mainly produce acid dyes and dye intermediates, and we are a professional Wholesale Acid Orange 7 dyes manufacturer of anthraquinone acid dyes in China.

  • Acid Orange 7
  • Acid Orange 7
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Acid Orange 7
Acid Orange II

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Dye Name Color Card
Light (Xenon)

Dyeing Depth
ISO 105 C10

ISO 105 E04
ISO 105 X12
Hot Pressing 
Chlorination water 

Dry Rub
Wet Rub
Acid Orange 7 6
1 5

4-5 4-5 4-5

Samples: Free samples are available, PSS can be sent to you before shipment. The quality of this item is very stable and once you confirm the quality we can deliver to you directly without PSS.
Tianya Industry is a fine chemical enterprise that engages in R&D, production, and operation of acid dyes and intermediates, which has obtained an ISO9001 certificate. Contact us freely for more details.

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Industry knowledge

In which industrial fields is Acid Orange 7 widely used?

Acid Orange 7 is a chemical with remarkable properties. Its chemical name is sodium 2-naphthol azo p-benzene sulfonate, which is an acidic azo industrial dye. It is well-known in the industry for its golden powder appearance and unique chemical properties. The melting point is as high as 164°C, its molecular formula is C16H11N2NaO4S, and its CAS number is 633-96-5.

In the textile industry, Acid Orange 7 is particularly widely used. Acid Orange 7's vibrant and long-lasting color provides bright, long-lasting color to textiles. Whether it is natural fibers such as wool, silk, cotton or linen, or synthetic fibers such as polyester or nylon, Acid Orange 7 can achieve uniform dyeing, making textiles appear bright and full colors. This color is not only beautiful, but also can enhance the grade and value of textiles.

Acid Orange 7 has strong tinting power and can achieve deep dyeing in a short time. In the dyeing process of textiles, tinting strength is one of the important indicators to measure the performance of dyes. Acid Orange 7 has excellent coloring power and can achieve the desired dyeing depth of textiles in a short time, thereby increasing production efficiency and reducing production costs.

Acid Orange 7 has good transparency and can keep the original luster and texture of textiles. During the dyeing process, many dyes can easily affect the gloss and texture of textiles, causing them to look dull. Acid Orange 7 can maintain the original luster and texture of textiles while dyeing, making textiles more beautiful and comfortable. Acid Orange 7 also has good wash and light fastness. During the use of textiles, washing and sunlight exposure are inevitable. Acid Orange 7 maintains color brilliance and stability over multiple washes and prolonged exposure to sunlight, extending the life of textiles.

The paper industry is also one of the important application areas of Acid Orange 7. During the production process of paper, various pigments and dyes are often added to enhance the visual effect and appeal of the paper. As a high-quality dye, Acid Orange 7 can give paper rich colors and unique texture, improving the added value and market competitiveness of paper.

Acid Orange 7 also plays an important role in other industrial fields. For example, in the fragrance industry, it can be used as a carrier for spices and essences to enhance the volatility and persistence of spices; in the leather industry, it can not only be used for dyeing, but also improve the softness and durability of leather; In chemical experiments, it can also be used as an acid-base indicator to detect the pH of a solution.

Although Acid Orange 7 has a wide range of applications in industry, it is also a potentially risky chemical. Due to its biological toxicity, more toxic substances such as sulfamethoxazole and 1-amino-2-naphthol are produced during anaerobic decomposition, so special care is required when using it. Especially in the food and cosmetics industry, Acid Orange 7 is clearly listed as a non-food coloring and is prohibited from being added to food. If this dye is accidentally added to food, it may cause food poisoning after consumption, and long-term consumption may even cause cancer.

When using Acid Orange 7, relevant safety regulations and operating procedures must be strictly followed to ensure the safety of personnel and the environment. At the same time, it is also necessary to strengthen the management and supervision of this dye to prevent its misuse or abuse.

As a high-quality industrial dye, Acid Orange 7 plays an important role in many industrial fields such as textiles, papermaking, fragrance making, and leather. Due to its potential risks, special care is required when using it, and management and supervision must be strengthened. Only in this way can its safety, effectiveness and wide application in the industrial field be ensured.