Molecular Formula | C13H18ClN5 |
Molar Mass | 279.76852 |
Solubility | Methanol (Slightly, Sonicated), Water (Slightly) |
Appearance | Solid |
Color | Very Dark Blue to Black |
Storage Condition | Refrigerator, Under inert atmosphere |
Alizarin Red 51 is a highly pigmented dye widely used in dyeing and printing processes in industries such as textiles, leather, and paper. It possesses a bright red color, high solubility in water, and good hydrophilic properties. Due to its alkaline nature, Alizarin Red 51 is typically used in combination with a mordant acid to regulate the acid-base balance and achieve better dyeing results.
The advantages of Alizarin Red 51 dye include its excellent dispersion and penetration in fibers, particularly effective for cotton dyeing. It exhibits good affinity and high brightness. Furthermore, Alizarin Red 51 dye demonstrates good lightfastness and washability, ensuring long-lasting colorfastness of dyed products.
However, Alizarin Red 51 dye also has some limitations. It shows weaker selectivity towards fibers and is more suitable for dyeing cotton fabrics compared to other fibers such as silk, wool, and linen. Additionally, Alizarin Red 51 dye loses its red color under highly acidic or alkaline conditions, thus requiring strict control of pH during the dyeing process to maintain the desired coloring effect.
In summary, Alizarin Red 51 is an extensively used organic dye in the dyeing and pigment industries. It is also referred to as basic powder red and has the chemical name 2-Naphthalenesulfonic acid, 6-hydroxy-5-((2-methoxy-4-((4-phenylazophenyl)diazenyl)phenyl)azo)-, disodium salt. It is a fine powdered substance with a red color.
The molecular structure of Alizarin Red 51 contains azo linkage, imparting excellent durability and resistance to sunlight, solvents, and chemicals. Due to its vibrant color and stability, Alizarin Red 51 finds wide applications in the dyeing industry, particularly in textiles, leather, plastics, and rubber.
Alizarin Red 51 can also be used as a water-soluble dye, capable of dissolving in water to form a saturated red solution. The pH of the solution can typically be controlled in the slightly alkaline to neutral range, making it suitable for coloring various fibers such as wool, silk, linen, and cotton.
In addition to the textile industry, Alizarin Red 51 can be used to prepare pigments. It is utilized in the production of oil paints, inks, watercolors, as well as in industries such as acrylics and screen printing.
Overall, Alizarin Red 51 is a widely-applied organic dye known for its vibrant color and stability. It plays a significant role in dyeing and printing processes in industries including textiles, leather, plastics, and rubber.