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Acid Blue 74 CAS 860-22-0

Molecular Formula: C16H11N2NaO8S2

Formula Weight: 446.38

ZSpharmac: Acid Blue 74 Raw Material Supplier

Product Name: Acid Blue 74
CAS No: 860-22-0
Purity: 99%

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Basic Info

Product Name:Acid Blue 74
Other Names:Indigo Carmine
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Dark Blue Powder
EINECS No.:212-728-8
Storage:Room Temp
Provide:Acid Blue 74 MSDS;
Acid Blue 74 COA

What is Acid Blue 74?

Acid blue 74, also known as indigo carmine or sodium indigo disulfonate, is an organic compound with a chemical formula of C16H8N2Na2O8S2, a relative molecular mass of 466.35, and a CAS registration number of 860-22-0. This dye belongs to the acid dye category and is primarily used in a variety of dyeing applications, including bio-dying, textile dyeing, and certain industrial uses. In biological experiments, it can be used as a stain for cell nuclei and other tissue components. In addition, it is approved for use in certain foods and cosmetics as a colorant, with good water solubility and bright blue color.

In its form as an aluminum lake, Acid Blue 74 may be combined with metal ions such as aluminum to form insoluble pigments for specific coloring needs. Acid Blue 74 products are available on different commercial platforms in different strengths and purity levels, including laboratory grade reagents and raw materials for industrial production.

Acid Blue 74 Property

Melting point >300°C
density 1.01 g/mL at 20 °C
refractive index n20/D 1.335
storage temp. room temp
solubility 1g/l
form Powder/Solid
Colour Index 73015
color Very dark blue to purple
PH7 (10g/l, H2O, 20℃)
PH Range11.5(blue)-14.0(yellow)
OdorLight odour
Water Solubility 1 g/100 mL (25 ºC)


Acid Blue 74 uses

  1. Textile industry:
    Acid blue 74, as a type of acid dye, is mainly used in the textile industry for dyeing wool, silk, nylon, other protein fibers and certain synthetic fibers, and can produce a distinctive blue effect.
    Paper industry:
    Used for paper dyeing, especially in the production of colored papers, decorative papers and specialty papers, to provide a stable blue tone.
  2. Biological staining:
    In biological and medical research, Acid Blue 74 is used as a histological stain, such as nuclear staining or bacterial staining, to observe and differentiate cellular structures.
  3. Food and Beverage Industry:
    As a food additive, Acid Blue 74 can be used to color food and beverages, imparting a bluish tinge to products, when complying with relevant food safety standards.
  4. Cosmetics and personal care products:
    In some cosmetic formulations, Acid Blue 74 can be added as a pigment to personal care products such as shampoos, soaps, and oral care products to achieve visual color effects.
  5. Other industrial applications:
    As a dye intermediate raw material, Acid Blue 74 may be further processed into other types of dyes or used for dyeing non-textile materials, such as leather, plastics, wood, etc.
    Aluminum lake:
  6. When combined with aluminum salts to form aluminum lakes, Acid Blue 74 can be converted into an insoluble pigment commonly used in printing inks and coatings for food packaging materials to ensure that the color does not migrate into the food.

Acid Blue 74 Features

Chemical structure and stability: Acid blue 74 has the chemical formula C16H8N2Na2O8S2. It is an indigo compound containing two sulfonic acid groups and is an aromatic acid dye. Its structure contains stable sulfonate functional groups, which makes the dye have good water solubility and charge stability, and shows high solubility and stability in acidic environments.

Dyeing performance: Acid blue 74 has excellent affinity and dyeing rate for cellulose fibers and certain synthetic fibers such as nylon. It is especially suitable for dyeing wool, silk and other protein fibers, and can provide bright and bright blue tones, and Good light fastness and weather fastness.

Reactivity and application: Due to its acidic properties, Acid Blue 74 can undergo ion exchange reactions with alkaline media, which makes it easy to adsorb and fix on fibers during dyeing processes. In addition to traditional textile dyeing, it can also be used to prepare insoluble pigments such as aluminum lakes, and can be extended to fields such as food additives, cosmetics and pharmaceutical industries.

Environmental protection and safety: As a chemical raw material, the production and use of Acid Blue 74 must comply with corresponding environmental protection and safety standards. Although it has low ecotoxicity under certain conditions, its wastewater discharge treatment must be carried out in accordance with regulations to ensure that the impact on the environment is minimized. At the same time, when applied in food and cosmetics, it needs to meet the strict food safety and cosmetic raw material licensing requirements of various countries.

Spectral characteristics and color performance: Acid Blue 74 has a specific absorption peak in the visible spectrum range, which determines its blue performance characteristics. This characteristic is crucial for industries that require precise color control.


Tabti, S., Benchettara, A., Smaili, F. et al. Electrodeposition of lead dioxide on Fe electrode: application to the degradation of Indigo Carmine dye. J Appl Electrochem 52, 1207–1217 (2022). https://doi.org/10.1007/s10800-022-01709-7

As a company specializing in the production and supply of Acid Blue 74 raw materials, we are committed to providing customers with high-quality products and preferential prices. We have rich experience and technology to ensure product quality and stable supply. No matter where you are, we can provide you with the Acid Blue 74 raw materials you need to support your production and research and development.

We always adhere to the principle of honest operation, strictly control product quality, and serve every customer with a customer-first attitude. Over the years, we have established good cooperative relationships with customers at home and abroad and won their trust and praise.

If you have needs or are interested in our products, please contact our service staff directly, we will wholeheartedly provide you with the best quality services and products. Looking forward to cooperating with you and developing together!

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

Help China Chemicals to benefit the happiness of human life
Become the most trusted chemical supplier in the world
Striver – oriented, enrich employees, customer first, deep service, seek development
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Cosmetic raw materials
  • Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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