CAS number: 1327-57-7
Properties: bluish-purple powder. Insoluble in water, soluble in sodium sulfide solution is greenish-gray. It is bluish-purple in concentrated sulfuric acid and is diluted to a dark blue precipitate. The dye becomes a light yellow light olive color in the alkaline insurance powder solution, and the original color can be restored after oxidation; Completely faded in sodium hypochlorite solution; It turns dark purple on concentrated sulfuric acid
Production method: nitrosation of phenol sodium nitrite and sulfuric acid to produce p-nitrosyphenol, condensation with o-toluidine dissolved in sulfuric acid, reduction and vulcanization with sodium polysulfide with a certain sulfur reflection number, and then through gas oxidation, and finally through filtration, drying, crushing and standardized treatment to produce products. Raw material consumption (kg/t) O-toluidine (99%) 165-210 phenol (industrial) 185-220 sodium nitrite 195-230 caustic soda (100%) 1-20 soda ash (industrial) 920-1120 sulfuric acid (100%) 900-1160 sulfur (99%) 430 sodium sulfide (63.5%) 480-620 Yuan powder 10
Uses: It is suitable for dyeing cotton, hemp, viscose and its fabrics, and can also be used for dyeing vinylon. This product is dyed navy blue main color dye, the color is more bright. Dyeing process stability is poor, easy to oxidize a hundred red edge, horizontal, red spot and other defects, especially Sulphur blue BRN, Sulphur blue 7 is easier to master. The use of pad dyeing can reduce the red edge, erythema and other defects. Because the number of batches of sodium polysulfide used in the production of this product is different, the commercial dyes have different colors. The blue light is called Sulphur blue 7, the blue red light is called Sulphur Blue 7, and the red light is called Sulphur blue 7, which should be paid attention to when applied. Sulphur blue 7 can be produced by using o-nitroethylbenzene, a by-product in the production of chloramphenicol, instead of o-toluidine
Our company mainly produces Sulphur black, Sulphur Black Liquid, Sulphur Blue 7.Perennial export to Bangladesh. India. Pakistan. Egypt, and Iran. Both the supply and the quality are particularly stable. More important is the price advantage
Post time: Feb-27-2024