Zhishang Chemical

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Sudan Ⅳ CAS 85-83-6

Molecular Formula: C24H20N4O

Formula Weight: 380.44

ZSpharmac: Sudan Ⅳ Raw Material Supplier

Product Name: Sudan Ⅳ
CAS No: 85-83-6
Purity: 99%

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Basic Info

Product Name:Sudan Ⅳ
Other Names:Solvent Red 24
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Brown-Red Powder/Solid
EINECS No.:201-635-8
Storage:Flammables Area
Provide:Sudan Ⅳ MSDS;
Sudan Ⅳ COA

What is Sudan Ⅳ?

Sudan IV, also known as Solvent Red 24 or Scarlet Red, is an organic compound commonly used as a biological dye and coloring of certain non-food substances.

Sudan Ⅳ Property

Melting point 199 °C (dec.)(lit.)
Boiling point 260°C
density 1.1946 (rough estimate)
vapor pressure 0Pa at 25℃
refractive index 1.6000 (estimate)
storage temp. Flammables area
solubility Insoluble in water; soluble in benzene, methanol, acetone, isopropanol; slightly soluble in ethanol
form Powder/Solid
Colour Index 26105
color Red Brown
Water Solubility 23μg/L at 25℃


Sudan Ⅳ Uses

1. Biological and medical research
Lipid staining: One of the most notable applications of Sudan IV is as a stain for lipids (especially fats) in biological and medical research. It can specifically bind to lipid droplets in cells or tissues, causing fat to appear bright red under a microscope, making it easy to observe and quantitatively analyze. This is crucial for studying diseases related to abnormal lipid metabolism such as obesity, fatty liver, and arteriosclerosis.

2. Cytology and Pathology
Histopathology staining: In histopathology, Sudan IV is used to detect fat deposition in tissue samples to help diagnose diseases such as glomerulosclerosis and steatosis.
Cell structure labeling: In cell biology research, Sudan IV can be used to label and track intracellular liposomes to help understand the distribution and dynamic changes of intracellular lipids.

3. Industrial Coloring and Materials Science
Dyeing of non-edible substances: Due to its good fat solubility and bright color, Sudan IV is used as an industrial dye to color non-edible items such as plastics, candles, rubber toys, soaps, and inks. It provides a long-lasting and vivid red tint in these applications.
Material detection: In some materials science applications, Sudan IV can also be used as a probe to detect fat or oil contamination on or within materials.

4. Environmental monitoring and forensic science
Environmental contaminant indication: Although uncommon, under certain circumstances, Sudan IV or its analogues can be used to monitor environmental contamination, such as detecting oil contaminants in water.
Forensic identification: In forensic science, Sudan IV can be used to detect traces of grease at crime scenes and assist in the reconstruction of criminal behavior.

Sudan IV Advantages and Features

Strong tinting power: Sudan IV has very strong staining ability and can provide bright and eye-catching red shades even at low concentrations, which is very useful in situations where high color development is required.
Good solubility: It is easily soluble in organic solvents such as alcohols, ketones, benzene, etc., which makes it more effective in dyeing applications in non-aqueous media, such as coloring plastics, waxes, inks, etc.
Lipid solubility: The lipid solubility characteristics of Sudan IV make it particularly effective as a lipid stain in biological histology, able to penetrate cell membranes and specifically bind to lipid droplets, facilitating the observation of lipid distribution under a microscope.
Structural stability: As an azo dye, Sudan IV has a relatively stable molecular structure and can maintain its color stability and chemical properties unchanged under certain environmental conditions.

Cost-effectiveness: Compared with other dyes, Sudan dyes may have an advantage in production costs because they are usually synthesized from relatively cheap raw materials.
Diversity of applications: In the past, Sudan IV has found applications in multiple industrial fields due to its dyeing properties and solubility characteristics, including but not limited to plastic products, textile pretreatment, scientific research dyeing, etc.


National Center for Biotechnology Information (2024). PubChem Compound Summary for CID 62330, Scarlet red. Retrieved May 30, 2024 from https://pubchem.ncbi.nlm.nih.gov/compound/Scarlet-red.

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

We always adhere to the principle of honest management, strictly control product quality, and serve every customer with a customer-first attitude. Over the years, we have established good cooperative relations with domestic and foreign customers and won their trust and praise.

If you have any needs or are interested in our products, please contact our service staff directly, and we will wholeheartedly provide you with the best service 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.

Get Sudan Ⅳ Quotation