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Acid Red 18 (CAS 2611-82-7), commonly known as Ponceau 4R or Cochineal Red A, is a highly versatile synthetic azo dye. It serves a wide range of industries: in textiles and leather, it dyes protein fibers like wool, silk, and nylon; in the food sector, it acts as a vibrant red additive (E124) for candies, beverages, and jams; and in cosmetics, it colors hair dyes and soaps.
Its major selling points make it a market favorite. First, it delivers a bright strawberry-red hue with exceptional tinting strength, ensuring vivid results. Second, it is highly cost-effective compared to natural dyes. Third, it boasts excellent water solubility for easy, uniform application. Finally, it offers strong stability against light and acids, guaranteeing that products retain their vibrant color over time without fading easily.
Items | Specifications | Results |
Description and Solubility | Odorless powder | Conform |
Pure dye content % | 85.0 | 85.0 |
Ether extraction % | ＜0.12 | |
Chlorides&Sulphates Percent by Mass % | ≤13.0 | 6.03 |
Volatile matter at 135℃ % | ≤5 | 3.74 |
Water Insoluble Matter % | ≤0.2 | ＜0.03 |
chromatic aberration % | ≤1 | 0.24 |
Subsidiary Dyes % | ≤1.0 | 0.3 |
4-Aminonaphthalene-1-Sulfonic acid % | ≤0.5 | ＜0.5 |
3-Hydroxynaphthalene-2,7-Disulfonic Acid % | ≤0.5 | ＜0.5 |
6-Hydroxynaphthalene-2-Sulfonic Acid % | ≤0.5 | ＜0.5 |
≤0.5 | ＜0.5 | |
7-Hydroxynaphthalene-1,3,6-Trisulfonic Acid % | ≤4.0 | ＜4.0 |
Unsulphonated aromatic amines(based on aniline) % | ≤0.01 | ＜0.01 |
Aerobic Bacterial Count CFU/g | ≤500.0 | ＜500.0 |
Total Number of molds and yeasts counts CFU/g | ≤100.0 | ＜100.0 |
Thermotolerant coliforms g | not detectable | Conform |
Staphylococcus Aureus g | not detectable | |
Pseudomonas aeruginosa g | not detectable | Conform |
Mercury(Hg) Mg/kg | ≤1.0 | ＜1.0 |
Lead(Pb) Mg/kg | ≤10.0 | ＜10.0 |
Arsenic(As) Mg/kg | ≤2.0 | ＜2.0 |
Cadmium(Cd) Mg/kg | ≤5.0 | ＜5.0 |
Conclusion | The product conforms to the above specifications. | |
CAS:2611-82-7
MF(分子式):C20H15N2NaO10S3
Melting point (熔点温度): >300oCc
form(状态) :powder
color(颜色):Wine
Uses(用途):
Acid Red 18 (酸性红18) is a synthetic azo dye with the CAS number 2611-82-7. It is also widely known by its common names such as Ponceau 4R, Cochineal Red A, and in China, it is frequently referred to as 胭脂红 (Yānzhīhóng).
Here is a breakdown of its uses and key selling points:
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