Direct Red 81 

Product Name: Direct Red 81 Other name:Direct Fast red 4B CAS No.:2610-11-9 MF: C29H19N5Na2O8S2 MW: 675.6 Origin:China Type:Direct Dyes Usage: Just as direct red 28, it can be used for dyeing cotton ,viscose ,nylon and wool. Qingdao Langke Co., Ltd is one of the main supplier of pigment,dyestuff  and their intermediates. In the past 10 years, we have sold the products to more than 20 countries. Either acid dyes or direct dyes, or even pigment, they all gained good reputation. To choose us as the partner, you will not be disappointed. C29H19N5Na2O8S2