Zhishang Chemical

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Zhishang Chemical

Acid Red 18 CAS 2611-82-7

Molecular Formula: C20H15N2NaO10S3

Formula Weight: 562.51

ZSpharmac: Acid Red 18 Supplement

Product Name: Acid Red 18
CAS No: 2611-82-7  
Purity: 99%

Basic Info

Product Name:Acid Red 18
Other Names:Food Red No. 102
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Food Additives
Appearance:Bordeaux to Brown Powder
EINECS No.:220-036-2
Storage:Inert Atmosphere,Room Temperature
Provide:Acid Red 18 MSDS;
Acid Red 18 COA

What is Acid Red 18?

There are many kinds of dyes, which can be divided into azo dyes, indigo dyes, anthraquinone dyes, sulfur dyes, phthalocyanine dyes, etc. Among them, azo dyes are the most used dyes in the world, accounting for more than 80%, and are widely used in dyeing and printing processes such as textiles and leather products. Azo dye wastewater has complex components, high concentration of organic matter, wide distribution, large changes in water quality, high content of organic poisons, deep chromaticity, difficult biodegradation, and contains a large amount of inorganic salts, sulfides, etc. In addition, the dye molecules are not easily decomposed, and can exist stably in the water environment and under the condition of light. Its metabolites are toxic and refractory organics with strong chemical stability and the “three causes” effects of carcinogenic, teratogenic and mutagenic. Azo dye wastewater is a difficult industrial wastewater to treat. There are many treatment methods. Among them, the electro-biological coupling method combines the advantages of biological methods and electrochemical methods. Simple equipment and so on. Acid red 18 is a monoazo-based azo dye. An experiment has been conducted to treat the simulated dye wastewater prepared with acid red 18 by electro-biological coupling method, and to study the effect of its treatment efficiency and current density.

As a food coloring, Acid Red 18 can be used for the coloring of fruit juice drinks, prepared wine, carbonated drinks, candy, cakes, ice cream, yogurt and other foods, but cannot be used in foods such as dried meat, dried meat products, aquatic products, etc., mainly to prevent some Criminals deceive consumers by using coloring to hide the appearance of bad raw meat, such as spoiled meat. According to my country’s “Hygienic Standard for the Use of Food Additives” (GB2760-1996), the use range and maximum use of Acid Red 18 are the same as those of amaranth, and it can also be used in candy-colored clothing and soy milk beverages, with a maximum use of 0.1g/kg; For red sausage casings, the maximum usage amount is 0.025g/kg, and the residual amount is 0.01g/kg[1].

Acid Red 18 Properties:

storage temp. Inert atmosphere,Room Temperature
form Powder
Colour Index 16255
color Bordeaux to brown


Acid Red 18 Uses

  1. Acid red 18 is made use of as a food tinting representative. According to my nation’s policies, it can be made use of in red as well as green silk, dyed canned cherries (for design) and also candy covering. The maximum use quantity is 0.1 g/kg;, bread toppings, environment-friendly plum, hawthorn items, dipped side dishes as well as shrimp (taste) pieces, the optimum use amount is 0.05 g/kg, as well as in soy milk drinks, red sausage casings and gelato, the maximum usage amount is 0.025 mg/kg.
  2. Acid red 18 can be utilized for dyeing of wool, silk, nylon and direct printing of textiles. Because the dyeing fastness and also levelness are poor, as well as the color is not as intense as acid red G, woollen fabrics are much less used. It can likewise be made use of for tinting leather, paper, wood products, plastics, inks, cosmetics, medicine, food, and so on.
  3. Acid red 18 is utilized as colorant for food, medication and cosmetics.

Production Method of Acid Red 18

Preparation of Acid Red 18
Dissolve 1-naphthylamine-4-sodium sulfonate in 8 to 9 times the amount (mass) of water at 75 to 85°C, filter and cool to 0 to 5°C; then add 1.2 to 1.5 times the amount (mass) of the original sodium salt of hydrochloric acid, stir well and let stand to precipitate fine 1-naphthylamine-4-sulfonic acid crystals, and cool it to below 5 °C; slowly add 1:2 (mass) sodium nitrite at 3 to 5 °C The solution is diazotized to obtain a yellowish paste-like diazo liquid. After the reaction, the feed liquid is strongly acidic to Congo red test paper (appears blue). Dissolve sodium gallate (sodium 2-naphthol-6,8-disulfonate) with stirring in 9-10 times the amount (mass) of water at 60-65°C, and then add part of sodium carbonate (1/5 of the total) , filtered after dissolving; the filtrate was put into the reactor, and then
The remaining sodium carbonate is stirred and cooled to 5~8℃, and then at 10~15℃ and the Ph value is 8, the diazo liquid is slowly added to carry out the coupling reaction for several hours. After the reaction is completed (sodium 2-naphthol-6,8-disulfonate is slightly excessive), the temperature is raised to 50-60° C., refined sodium chloride is added, stirred, and allowed to cool to room temperature naturally, and crystallization is precipitated by standing. Stir and dissolve the crystal in 15 times the amount (mass) of clean water at 70°C, and add an appropriate amount of sodium carbonate to make the solution slightly alkaline. After filtering, add refined salt, stir and adjust the pH value to 6.5-7.0 with hydrochloric acid, mean formation, different as well as dry to obtain the product. Preparation of carmine aluminum lake: Light weight aluminum hydroxide is prepared from light weight aluminum salts such as aluminum chloride, light weight aluminum sulfate, and alkalis such as sodium carbonate, contributed to Acid Red 18 liquid service, as well as sped up to get the product.

Other Applications of Acid Red 18

1. prepare a kind of lip balm with coconut oil as main raw material, be made up of following parts by weight raw materials: coconut oil 25~30, sesame oil 3~5, castor oil 3~5, beeswax 25~35, vitamin A 0.02~ 1. Vaseline 10~20, acid red 180.01~1, cetyl alcohol 2~3, preservative 0.1~1, essence 0.1~1; when preparing, first combine coconut oil, sesame oil, castor oil, vitamin A, beeswax, vaseline , Cetyl alcohol is mixed, heated and melted, mixed evenly, then add acid red 18, preservatives, and essence to mix evenly, pour into the mold, solidify, demould, package, and get the product; the raw materials required for the product of the present invention are naturally available and cheap , the formula is scientific and reasonable, the production process is simple and feasible, and the energy consumption is low. .

2. Make a pomegranate soda. It is composed of the following parts by weight: 15-20 parts of pomegranate juice, 5-8 parts of sodium citrate, 5-8 parts of tea polyphenols, 3-5 parts of vitamin C, 3-5 parts of sweetener, and emulsifier. 3-5 parts, white sugar 5-10 parts, potassium sorbate 3-5 parts, carbon dioxide 20-30 parts, acid red 181-3 parts, purified water 20-25 parts. The pomegranate soda provided by the invention provides a new taste for soda, which can meet the greater demands of consumers, and the pomegranate has the functions of reducing summer heat and detoxifying, promoting body fluid and stopping diarrhea, and can complement each other with carbonated drinks in summer, so as to relieve summer heat. The effect is even better, both of which can slow down stomach acid, and have double effects on the maintenance of the stomach, and the pomegranate soda is rich in nutrients and suitable for children to drink.

3. Prepare a sesame seed treatment agent, which comprises the following active ingredients, carbendazim, phoxim, chlorpyrifos, rooting powder, potassium dihydrogen phosphate, boron fertilizer, acid red 18. The seed treatment agent of the invention is easy to obtain in raw materials, simple in preparation method and convenient in operation, integrates the pest control agent and plant nutrition with each other and has a synergistic effect, and has the characteristics of low toxicity, complete efficacy, high application value, low cost and the like. Seed coating can effectively prevent sesame seedling stage fusarium wilt, blight, root rot and other diseases and underground pests such as cutworms, mole crickets, grubs, golden needle insects and other underground pests and seeds being pecked by birds, and also timely supplement sesame nutrition , to improve the speed of seed germination, and promote the effectiveness of seedlings and seedlings. The sesame seed treatment agent has the characteristics of high efficiency, low toxicity, safety, environmental friendliness, low price, etc., is conducive to realizing the standardization of sesame seeds, and meets the requirements of modern high-efficiency agriculture.

4. It is used to prepare a kind of sweet and sour crisp ginger, and this process can produce full ginger body and red color, namely sweet and sour crisp ginger. The present invention is achieved through the following technical solutions: selecting fresh ginger that is not old and not tender, and washing it with water. After draining, pour it into the pool, sprinkle salt between the layers for pickling to make it initially dehydrated. After dicing, rinse the ginger slices with clean water and soak them in a pool filled with clean water. After taking them out, wash them with clean water, then pour them into the tank, pour in white vinegar to cover the ginger noodles, and add the acidity dissolved in boiling water. Red 18 liquid and lemon yellow liquid make the pigment penetrate into the ginger slices. The colored ginger slices and white sugar are candied in a ratio of 1:1. It is then boiled in an iron pan to concentrate the sugar liquid.

Acid red 18 Wastewater Treatment

The acid red 18 dye wastewater was treated by electro-biological coupled hydrolysis-aerobic contact oxidation, and the effect of current density on the treatment efficiency was investigated. The micro-electric field was applied in the hydrolysis reactor, the electro-biohydrolysis HRT was 12 h, the aerobic contact oxidation HRT was 7.95 h, and the current densities were 0.024, 0.048, 0.071 and 0.095 mA/cm2, respectively. The method has a good removal effect on the mass concentration, chromaticity and COD of acid red 18 dye wastewater, and also has a certain removal effect on ammonia nitrogen, and the removal rate increases with the increase of current density. The results show that when the current density increases to 0.095 mA/cm2, the treatment effect of mass concentration, chromaticity, COD and ammonia nitrogen is the best. At this time, the removal rate of each index by the electro-biological system is 98.70%, 95.67% and 90.06%, respectively. % and 53.15%.

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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