We mainly produce acid dyes and dye intermediates, and we are a professional Wholesale Acid Yellow 42 dyes manufacturer of anthraquinone acid dyes in China.

  • Acid Yellow 42
  • Acid Yellow 42
  • Acid Yellow 42
  • Acid Yellow 42
  • Acid Yellow 42
  • Acid Yellow 42
Other Acid Dyes Series

Acid Yellow 42
Acid yellow MR

- Brilliant shades(Bright-colored)
- High wet fastness
- Medium levelling properties
- Milling acid dyes with disulfonic groups.

Mainly used for the dyeing of polyamide, wool and its blended fabrics;
Used for direct printing of silk and glue;
Used for dyeing of polyamide and leather.
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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 Yellow 42 4-5
60 1 5

5 5 5

Dye Name: Weak Acid Yellow C-R, Weak Acid Yellow R, Weak Acid Yellow MR, Acid Yellow N-CRS, Acid Yellow R
CAS Registry Number: 6375-55-9
The dye is a bright yellow powder, ranging in color from yellow to reddish light yellow.
- It is soluble in water and has a tartrazine color;  It is also tartrazine in ethanol, but only slightly soluble in acetone.
- When exposed to concentrated sulfuric acid, it takes on a tartrazine color, which remains unchanged even after dilution.
- When the aqueous solution of this substance meets concentrated hydrochloric acid, it will also take on a tartrazine color;
- Sodium hydroxide solution becomes lemon yellow when concentrated.
When stained, the substance is slightly reddish dark in color, and does not change when it encounters chromium ions, but becomes green dark when it encounters iron ions.
Molecular Structure: Bisazo dyes series

Molecular Formula: C32H24N8Na2O8S2
Molecular Weight: 758.69
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

What fibers is Acid Yellow 42 usually used for dyeing?

Acid Yellow 42 is an acid dye commonly used to dye various types of fibers, including natural and synthetic fibers. The versatility of this dye makes it widely used in the textile industry.
Natural fibers:
Wool: Acid Yellow 42 is suitable for dyeing wool. Wool dyeing is one of the common applications in the textile industry, and Acid Yellow 42, as an acid dye, also plays an important role in the wool dyeing process. Before dyeing wool, some preparations need to be carried out, including
Clean the wool to ensure that the surface of the wool is free of impurities and grease, so that the dye can evenly penetrate into the fiber; pre-treatment, the wool may need to be pre-treated, such as bleaching or pre-dying, to ensure the absorption and uniformity of the dye.
Silk: Silk is another commonly used natural fiber that can also be dyed with Acid Yellow 42. This dye produces rich, vibrant colors on silk fabrics with good color fastness, making it popular for clothing and home textiles.
Cotton: Although acid dyes are generally not suitable for fibers such as cotton, Acid Yellow 42 can also be used to dye cotton. During the dyeing process, dyeing parameters such as temperature, pH value, time and dye concentration need to be strictly controlled to ensure the consistency and stability of the dyeing effect. Silk dyed with Acid Yellow 42 usually has bright, vivid colors, and the color is uniform and long-lasting. This dye has good color-fixing properties and can form a stable chemical bond on silk fibers, making the dyeing effect highly washable and lightfast.
synthetic fiber:
Polyester: Polyester is a common synthetic fiber commonly used to make clothing, bedding, and home furnishings. Acid Yellow 42 is also suitable for dyeing polyester, which can produce bright colors on polyester fibers and has good lightfastness and washability.
Nylon: Nylon is another commonly used synthetic fiber that has excellent abrasion resistance and strength and is often used to make clothing, socks, sports equipment, etc. Acid Yellow 42 can be used to dye nylon, giving it rich colors and making it more attractive and versatile.
Polypropylene: Polypropylene is a heat-resistant and wear-resistant synthetic fiber commonly used in outdoor products, sportswear, and car seats. Acid Yellow 42 can also be used to dye polypropylene to add color while maintaining its durability and functionality.
Acid Yellow 42 is a versatile acid dye suitable for dyeing a variety of natural and synthetic fibers. It can not only give bright colors to fiber products, but also has good color fastness and washing resistance, making it widely used in the textile industry.

What applications does the dye Acid Yellow 42 have outside the textile industry?

In addition to the textile industry, the dye Acid Yellow 42 also has a variety of applications in other fields. Below I will introduce some of the fields it will cover:
Printing and dyeing: In addition to textiles, this dye can also be used for printing and dyeing of paper, leather, plastic and other materials.
Biomedicine: In the biomedical field, dyes are commonly used to stain cells and tissues for microscopic observation, histological studies, and medical diagnosis. In histological research, dyes can be used to stain tissue sections to observe and analyze the structure, morphology, and function of cells and tissues. Different dye choices highlight different cell and tissue structures, helping doctors and researchers make more accurate diagnoses or research discoveries. In cell biology research, dyes can be used to stain living cells to observe their morphology, activity, and internal structure. This is critical for studying cell function, biochemical processes, and cell-cell interactions.
Cosmetics: Dyes can be used in the formulation of lipsticks and lipsticks to provide products with a variety of color options, from natural tones to more vibrant colors. In eyeshadow products, dyes can be used to create a variety of different eye makeup effects, including bright colors or soft, natural tones. Dyes are used to color nail polish and can create a variety of nail colors to meet consumer needs for different occasions. Dyes are also used in facial makeup products, such as blush and foundation, to adjust skin tone, add shine, or create specific makeup effects.
Food and Beverages: Dyes can be used to color various types of soft drinks such as carbonated drinks, juice drinks and energy drinks to provide an attractive color and appearance. Dyes are widely used to color candies, chocolates, candy coatings, and various desserts and dessert decorations, adding various colors to them and making them more attractive. Dyes can be used to color various types of sauces, condiments and dressings such as ketchups, mustards, dips, etc. to provide a consistent appearance and color to the product. Dyes can be used to color various canned foods, such as canned vegetables, canned fruits, canned meat, etc., to maintain product appeal and market competitiveness.
Arts and Crafts: Dyes can be used in paintings, including watercolors, oils, acrylics, and more. Artists can take advantage of the color and transparency properties of dyes to create a variety of color effects and visual effects. Dyes can be used to dye fabrics to create a variety of patterns and color combinations. This technique is very common in textile arts and handicraft making, such as making clothes, scarves, curtains, etc. Dyes can be used in the production of various handicrafts, such as plush toys, decorations, jewelry, etc. Through dyeing, handicrafts can be made more personalized and artistic.
Scientific research: Dyes are often used as indicators to indicate the end point of a specific chemical reaction or the formation of a product in chemical experiments. For example, in an acid-base neutralization reaction, the color of the dye changes with the pH value, which can be used to accurately determine the pH of the solution. In cell biology and molecular biology research, dyes can be used to label specific cells or cellular components so that their behavior and interactions can be observed in experiments. This is useful for studying processes such as cell structure, function, and signaling. Some fluorescent components in dyes can be used as fluorescent labeling agents to label specific molecules or structures in cells or biological samples. This technique is commonly used in applications such as microscopy imaging and cell tracking.