Quinizarin 1,4-Dihydroxyanthraquinone CAS NO 81-64-1

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Products Description

Name: Quinizarin Powder

Cas: 81-64-1

Purity: 99%min


Basic Info:

CAS No.:






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Product Introduction:

1,4-Dihydroxyanthraquinone, also known as Quinizarin or Solvent Orange 86, is an organic compound derived from anthraquinone.

Quinizarin is an orange or reddish brown crystalline powder formally derived from anthraquinone by replacing two hydrogen atoms with hydroxyl (OH).

It is one of the 10 dihydroxyanthraquinone isomers, and is present in the roots of Rubia madder in small amounts (as a glycoside).

Product Nature:

  • Density: 1.54 g/cm3
  • Boiling point: 450 °C
  • Melting point: 198-199 °C(lit.)
  • Flash point: 222 °C
  • Refractive index: 1.732
  • Water solubility: <1 g/L (20 ºC)


Product Name1,4-Dihydroxyanthraquinone Powder
CAS No.81-64-1
Appearance Orange or red crystalline powder
Content99% min
Shelf Life2 years
Packing1kg/bag,25kg/bag or as your requirements

Product function:

  • 1,4-Dihydroxyanthraquinone can be used to produce intermediates for vat dyes, disperse dyes and reactive dyes.
  • Transparent Orange 2G is mainly used to color oil, but Quinizarin is also used to color various plastics, resins and their products.
  • Quinizarin is an important dye intermediate, a disperse brown GL (C.I.58050).
  • Quinizarin is used to manufacture Disperse Blue HSR, Disperse Blue 5R, Disperse Blue B, Disperse Dark Blue RB, Acid Anthraquinone Blue R, Weak Acid Brilliant Blue RAW, Weak Acid Green GS, Reduced Gray BG, Reduced Brown BR, etc. Produces 1,4-diaminoanthraquinone.
  • From Quinizarin to sulfonate, 1,4-dihydroxyanthraquinone-2-sulfonic acid can be obtained.


  1. Bigelow, L. A.; Reynolds, H. H. (1926). “Quinizarin”. Org. Synth6: 78. doi:10.15227/orgsyn.006.0078.
  2. Bien, H.-S.; Stawitz, J.; Wunderlich, K. “Anthraquinone Dyes and Intermediates”. Ullmann’s Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_355.
  3. Wikipedia


Pre-Sales Service

* Timely reply and 24 hours online, the professional team will provide you with the most favorable prices and high-quality products.

* The sample supports testing and inspection.

* Each batch of products will be tested to ensure that its quality meets user needs.

*Packaging can also be made according to customer requirements.

*Any inquiries will be answered by our relevant personnel within 24 hours.

*We will provide you with commercial invoice, packing list, packing list, COA, health certificate and certificate of origin if you need it. If your market has other special requirements, please let us know.


After-Sales Service

*We will monitor the logistics information in real time and will share the information with you.

* You can consult us at any time if you have any questions about the product, and we will answer you in time.

*If you have any questions about the product, you can report it to us, we will deal with it in time for you, and the product can be returned.


1. ≤50kg, we recommend express delivery, usually called DDU service;

2. ≤500kg, air transportation is generally recommended, usually called FOB, CFR or CIF service;

3.>500kg, sea freight is generally recommended, usually called FOB, CFR or CIF service;

4. For high-value products, please choose air and express to ensure the safety of the products.


Do you accept sample order?

We will make samples before mass production. After the samples are approved by the department and users, we will start mass production. During the production process, we will carry out 100% inspection, and then carry out random inspection before packaging.

How to confirm whether the product quality meets our needs before placing an order?

You can consult us to get free samples of some products, you only need to pay the freight or arrange express delivery to us and get the samples. You can send us the product specifications and requirements you need, and we will manufacture products according to your requirements.

What’s your MOQ?

Our MOQ is 1kg. But usually we can also accept a smaller quantity, such as 100g, if you need it, provided that the sample fee 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.

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