Product description: Direct Fast Yellow RS, Name:C.I.Direct Yellow 50,C.I.29025 Molecular Structure: Double azo class C.I.Direct Yellow 50,C.I.29025,CAS 3214-47-9,956.82,C35H24N6Na4O13S4,Direct Yellow RS,Direct Fast Yellow FTF,Direct Fast Yellow RS Molecular Formula:C35H24N6Na4O13S4 Molecular Weight: 956.82 CAS Registry Number:3214-47-9 1.Properties and Applications: red light yellow. Soluble in water for golden brown, solubility of 60 g/L (60 ℃), 80 g/L (97 ℃), slightly soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for quality in red, dilute for green light blue after blue precipitation; In nitric acid solution for purple. The dye solution to join strong hydrochloric acid has the purple precipitation; Add thick sodium hydroxide solution with gold orange precipitation. Cellulose fiber of dyeing, in 80 ℃ maximum when affinity, for the neutral, weak acid dye bath dyeing. Hard to not sensitive. In dyeing copper and iron ion colored light basic unchanged. Mainly used for cotton, viscose, which silk dyeing and printing, and can directly printing, also can to discharge printing color. Can and disperse dyestuffs high temperature polyester/cotton with bath dyeing blended fabric. May also used for the dyeing nylon, leather, paper and electrochemical aluminum color. Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water Fading Stain Fading Stain ISO 3-4 3 6 2-3 2 AATCC 5 3 5 2-3 1-3   2.International similar brand Arid Fast Yellow RLSW Atlantic Resin Fast Yellow NRLSW Burco Direct Yellow 2RLSW Concorde Direct Yellow AGFL Condirec Yellow EO Direct Fast Brilliant Yellow RS Direct Fast Yellow RLSW Direct Fast Yellow RS Direct Fast Yellow RS 176 Direct Light Yellow RLL Direct Yellow 2RLS Direct Yellow 2RLSW Direct Yellow NRLSW