Acid Orange 7

Acid Orange 7 is a representative monoazo acid dye that has established a classic status across multiple industrial coloring fields due to its bright golden-yellow appearance and unique performance characteristics. The product appears as a uniform golden-yellow powder, and its dissolution properties hold significant optical indicative value: it exhibits a clear reddish-yellow color in aqueous phase and transforms into a bright orange shade in alcoholic solutions. During chemical identification, it instantly displays a magenta color in concentrated sulfuric acid, precipitates a characteristic brownish-yellow sediment upon dilution, maintains a stable golden-yellow hue in concentrated nitric acid, and remains chemically inert in concentrated sodium hydroxide solution. This series of distinct color reactions serves as an essential basis for product quality control.

In terms of dyeing applications, the product demonstrates a special affinity for protein fibers and has become one of the industry-standard choices for yarn dyeing processes. It produces full and bright orange-yellow shades on wool and silk, and due to its minimal fiber damage characteristics, it is particularly suitable for high-end fine knitwear processing. While attention must be paid to interference from copper and iron ions during dyeing (copper ions cause the color to shift toward reddish-dark, while iron ions result in lighter and duller shades), its dyeing reproducibility remains excellent under proper water quality management. The product is equally reliable for applications on synthetic fibers such as nylon, achieving good penetration effects when combined with specialized auxiliaries.

The true outstanding value of this product lies in its cross-industry application extension capability. High-purity specification products, through stringent purification processes, control heavy metal and harmful aromatic amine residues within food-grade standards, enabling their safe use as food colorants in beverages, candies, and other products. In the field of chemical derivatives, its metal complexes can serve as core raw materials for high-performance organic pigments, widely used in automotive coatings and specialty ink systems. Meanwhile, solvent dye derivatives generated through amination reactions exhibit excellent migration resistance in engineering plastic coloring. In dye blending systems, this product acts as a key toning component for composite black dyes such as Acid Black ATT, contributing 30%–40% to the final color tone.

Through directed synthesis and refinement technologies, we ensure consistency in the product's chemical structure, complemented by a comprehensive quality control system. This enables the product not only to meet the demands of traditional textile dyeing but also to adapt to the specific standard requirements of industries such as food, coatings, and plastics. We provide full-spectrum technical services, ranging from basic process parameters to specialized application certification support, ensuring that this classic dye continues to create value within the contemporary fine chemical industry system.

We have a production base with hundreds of workers on the production line, equipped with advanced equipment and manufacturing technology. We produce over 30,000 tons of dyes and auxiliary products annually, including 12,000 tons of disperse dyes and 15,000 tons of direct, acid, and basic dyes.

Shandong Inno-Chem CO., LTD. founded in 2010, which is a comprehensive industrial group specializing in the production and operation of a series of dyes, including disperse, liquid disperse, solvent, reactive, liquid reactive, vat, direct, acid and cationic dyes, dye intermediates, textile printing and dyeing auxiliaries, sodium hydrosulfite and other chemicals, as well as TPU films. We are one of the leading dye and pigment manufacturers and exporters in China.