Dyestuff

Aniline violet is one of the earliest synthetic dyes, which greatly reduces the cost of purple dyes. The most famous purple dye in ancient times is "shellfish purple" extracted from the conch of bony Snail family. It takes a large number of bony snails to extract a little, and the cost is very high. Purple thus becomes the representative of the upper class social identity. This product is used as a local anti infective and bactericide in medicine. Its aqueous solution (10g / L) is commonly used as purple medicine. It can be used as dye in industry to dye wool, silk and cotton products treated with tannin into purple; Also used for dyeing paper, leather and making ink, printing color, carbon paper, etc.

Used as an intermediate in organic synthesis, used in pesticides, medicines, dyes, etc.

Used for package, decoration, paint, ink, polyester, nylon, etc.

O-toluidine is mainly used as dye intermediate, dye industry, analytical reagent, adsorption indicator and redox indicator.

The blue-green powder is easy to dissolve in water and appears blue. The dyeing shade does not change at high temperature (120 ℃). The color slightly changes when it meets with copper and iron ions. The light fastness is 6-7, and the compatibility value is k = 3.5. It is mainly used for printing and dyeing of acrylic fiber and its blended fabric. Dyeing in acetic acid and sodium acetate bath, the shade is stable when pH < 5. If dyeing with sulfuric acid bath, the color is light and green. If it is dyed in formic acid bath, the shade will not change. It is suitable for dyeing bright light blue. The product can be combined with cationic yellow x-6g and red X-GRL to form three primary colors, which can be used to dye various light and dark colors. The light color is bright blue with a little red light, and the dark color is rich navy blue. The product can be used with cationic X-GRL. Because of its heavy staining on its chemical fiber, it is not generally used for dyeing blended fabrics.