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Acid Blue 90 CAS 6104-58-1

Molecular Formula: C47H48N3NaO7S2

Formula Weight: 854.02

ZSpharmac: Acid Blue 90 Supplement

Product Name: Acid Blue 90
CAS No: 6104-58-1
Purity: 99%

Basic Info

Product Name:Acid Blue 90
Other Names:Acid Blue 90; Acid Brilliant Blue G;
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Chemical Raw Materials
Appearance:Dark Blue-Violet-Brown Solid
EINECS No.:228-058-4
Provide:Acid Blue 90 MSDS;
Acid Blue 90 COA

What is Acid Blue 90?

Acid Blue 90 is a metallic luster of deep violet to bronze granules or powder. Odorless. Light resistance and heat resistance are strong. Stable to citric acid, tartaric acid and alkali. Easily soluble in water (18.7g/100ml, 21℃), 0.05% neutral aqueous solution is clear blue. It is cyan in weak acid, yellow in strong acid, and purple only when it is boiled and alkali is added. It can be mixed with lemon yellow to form a green pigment. Acid Blue 90 is a triarylmethane and xanthene dye, often obtained by oxidation of its leuco. Existing industrial methods all use heavy metal compounds such as sodium dichromate, manganese dioxide or lead dioxide as oxidants, and oxidize in a stoichiometric manner in the presence of complexing agents such as oxalic acid.
Acid Blue 90 is stable in tartaric acid and citric acid, with strong alkali resistance and good salt resistance. However, adding metal salts to the solution will precipitate slowly, and the reduction resistance is stronger than that of azo dyes. Brilliant blue is extremely chromatic and is often used in combination with other food colorings in small quantities.

Acid Blue 90 Properties:

Melting point 100 °C
Fp 11 °C
storage temp. 2-8°C
solubility H2O: soluble1mg/mL
form Solid
Colour Index 42655
color Dark blue-violet-brown
Water Solubility Soluble in water (50 mg/ml) and ethanol (40 mg/ml).


Acid Blue 90 Uses

Acid Blue 90 used for silk and nylon. It has bright color, good wet fastness, poor light fastness, and is rarely used in wool fabrics. It is also used for direct printing of wool, silk and nylon fabrics, as well as leather and paper coloring. In biochemical studies, it is used for protein staining by gel electrophoresis. It is 3 times more sensitive than Naphthol Blue Black B1 (Naphthol Blue Black B1) without penetrating into the gel. It is simple and sensitive; it can detect various proteins, and the chemical substances and free amino acids involved in the Lowry reaction have no effect on the detection of protein staining. any impact. Acid Blue 90 is also a P2X7 purinergic receptor agonist.

Production Method of Acid Blue 90

Using benzaldehyde, N-benzyl-N-ethyl-m-toluidine (N-benzyl-N-ethyl-m-toluidine) and p-aminophenethyl ether as raw materials, benzaldehyde and N-benzyl-N-ethyl ether are used as raw materials. base m-toluidine condensation, and then the condensation product is sulfonated to obtain trisulfonic acid compound, which is then oxidized, reacted with p-aminophenethyl ether, and neutralized to obtain the product. 1000kg of N-ethyl-N-benzyl-m-toluidine was added to the mixed solution consisting of 214kg of 100% sulfuric acid, 126kg of ice and 14kg of ethanol, then 245kg of benzaldehyde was added, reacted at 100°C for 50h, and heated to 110°C within 10h Part of the water was evaporated, and then the material was quickly poured into the tray, and a large amount of water evaporated to obtain about 1500kg of condensate. 750kg of condensate was added to 1500kg of 100% sulfuric acid within 24h until it was completely dissolved, 1040kg of 65% oleum was added dropwise at below 30°C, and stirred until the reaction was complete. Then poured into 3000L of water and 1500kg of ice, heated to 80°C, and then added 2700kg of sodium sulfate to separate out the sulfonated product and filtered. After diluting 1/4 of the sulfonated product with water, add 20kg of 50% acetic acid and 30kg of 30% hydrochloric acid, heat to 45°C, then add 96kg of 100% lead peroxide (to make a paste with 200L of water), and after reacting for 30min, add 80kg of sulfuric acid Sodium, precipitated lead salts, filtered at 45 ℃. The filtrate was salted out with 20% brine (by volume), filtered, and the filter cake was washed with 20% brine and dried under vacuum at 95°C to obtain the oxidized product. Take 600kg of oxidation product, add it to 750kg of p-ethoxyaniline at room temperature, heat to 100-105℃, react for 3.5h, cool down to 60-70℃, add 5000L water and 800kg 30% hydrochloric acid mixture, stir for 1h, siphon Remove the p-ethoxyaniline mother liquor, add 2000L of hot water, stir for 30min, and after standing, siphon off the p-ethoxyaniline washing water. The viscous dye was dissolved in the hot water of 35kg of sodium chloride and 30kg of sodium acetate, then about 80kg of acetic acid was added to make it acidic, the dye was separated out, the waste water was siphoned off, and vacuum-dried to obtain about 500kg of the dye.

Preparation of Acid Blue 90

Take 200ml of acid blue No. 90 solution of leuco (including 10g to 61g of leuco), add 0.10g to 0.59g of iron phthalocyanine tetrasulfonyl-n-butylamine to the solution, and add 10ml of 30% hydrogen peroxide to the solution with stirring at room temperature. 50ml, while adding sulfuric acid dropwise to keep the solution acidic, after 40min of reaction, UV-Vis spectrometer detects the dye color and light intensity reaches the maximum, calculates the dye content, it can be seen that the leuco body is completely converted into dye, and the yield is more than 95%. Use the MINOLTA SPECTROPHOTO METER CM3600d colorimeter to detect that the color of the dye meets the standard.
CN200910172516.3 provides a detection technology that only has specific response to protein in food, fast reaction speed, stable color development, small interference factors, and is superior to the conventional Kjeldahl nitrogen determination method for the food safety inspection department, so as to establish a fast and simple method The rapid detection method of food protein can solve a large number of food public safety problems. In order to achieve the above purpose, the present invention is achieved as follows: after the sample is pretreated, take 100 μL of the detection sample and mix it with 2400 μL of the self-made protein optical detection reagent, the protein in the sample reacts with the detection reagent, and the reaction product has a color reaction at 610 nm. The maximum absorption peak is obtained by comparing the Abs610 values ​​of protein standard samples with different concentrations to formulate a standard curve, and obtain the protein content in the test substance according to the Abs610 value of the test sample, thereby obtaining the present invention. The self-made protein optical detection reagent is composed of straight chain alcohol, polycyclic sulfophthalein dye and dodecyl salt. The polycyclic sulfophthalein dye is composed of one or more of tetrabromophenolsulfonphthalein, acid blue 90, phenol red, cresol red, dichlorophenolsulfonylphthalein, bromophenol red and cresyl violet. Tetrabromophenol sulfophthalein, acid blue 90, dichlorophenol sulfonylphthalein, bromophenol red and cresyl violet are the preferred polycyclic sulfophthalein dyes, tetrabromophenol sulfophthalein, acid blue 90 and bromophenol red are polycyclic sulfone The most preferred are phthalocyanine dyes. For the polycyclic sulfophthalein dye, the amount to be added is preferably 100-200 mM.

Acid Blue 90 Limited Use

my country’s “Hygienic Standard for the Use of Food Additives” (GB-2760-1996) stipulates:
Used for fruit juice (flavored) beverages, carbonated beverages, prepared wine, candy, pastry decoration, dyed canned cherries (for decoration, not edible), ice cream, popsicles, ice cream, jelly, fried tofu, puffed food, flavor Yogurt, green plum, shrimp (flavor) slices, the maximum usage is 0.05g/kg;
For red and green wire 0.01g/kg;
For solid beverages, 0.20g/kg;
For green mustard paste, 0.01g/kg;
For cocoa corn flakes (instant breakfast cereals) 0.015g/kg.
[Remarks]: When mixing pigments of the same color, the dosage should not exceed the allowable amount of a single pigment. The amount of solid beverage and high-sugar fruit juice or fruit-flavored beverage added should be added according to the dilution ratio of the product.

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: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food 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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