C.I. Acid Black 168(8CI,9CI) (12238-87-8)

The Acid Black 168, with the cas registry number 12238-87-8, has other names as Sella Fast Grey BRL. This is a kind of black well-distributed powder and its products category are including dye; acidic dye; neutral dye.

The production method of making this chemical is as follows: Firstly, prepare the material of 4-nitro-2-aminophenol, 1-amino-2-hydroxy-4-naphthalenesulfonic acid, 1-acetamido-7-naphthol, 2-naphthol; Secondly, diazotize the 4-nitro-2-aminophenol and 1-amino-2-hydroxy-4-naphthalenesulfonic acid, and then couple with 1-acetamido-7-naphthol and 2-naphthol; Lastly complex with sodium chromium salicyloate, then go through the listing process of filtering and drying to get the products.
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As to its usage, it is widely applied in many ways. It could be used in dyeing and direct printing of wool, silk, tussah silk, nylon, vinylon fabric, cotton.