Direct red 23(direct red 4bs)

Product Name: Direct Red 23

C.I. No.: 29160

CAS No.: 3441-14-3

Molecular Formula: C35H25N7Na2O10S2

Molecular Weight: 813.73

Relative Name:

Direct Red 4BS; DirectScarlet; Direct Scarlet 4BS; Direct Scarlet Lightfast; Direct Scarlet SE;Enianil Fast Scarlet 4BS; Erie Fast Scarlet SCB; Fast Red 4BS; Fast Scarlet4BSA; Fenamin Fast Scarlet 4BS; Hispamin Fast Scarlet 4BS; Kayafect Red G;Kayaku Direct Fast Scarlet 4BS; Levacell Scarlet 4BS; Libia Scarlet 4BS; MitsuiDirect Fast Scarlet 4BS; Nippon Fast Scarlet 4BS; Nyanza Fast Scarlet 4BSA;Orbamin Scarlet 4BS; Paper Scarlet 4BS;

Shade: red. Purple powder.

Direct Red 23 Dyeing Fastness(grade)

Direct Red 23 Properties and Applications:

Direct Red 23 alias direct red B, direct acid-resistant vermilion 4BS. Appearance is generally purple-red uniform powder. Dissolved in water is bright red, slightly soluble in alcohol, orange, insoluble in acetone. Large red to magenta in concentrated sulfuric acid After dilution, it turns brownish orange; there is orange-yellow precipitate in concentrated nitric acid; it is red in concentrated sodium hydroxide, and dilute sulfuric acid is added to the blue water in the aqueous solution. Concentrated hydrochloric acid has burgundy precipitate, plus 10% soda ash. Change. When the copper ion color is dimmed, the color of the iron ion is almost unchanged.

Application:

1. Direct Red 23 dyed cotton or viscose fiber has yellow-red color, good dyeing rate, poor transferability, sensitive to salt. It is recommended to slowly heat up and add salt to control the dyeing, which can obtain uniform color. The dye bath should be naturally cooled to 80 ° C in the later stage to facilitate the dye exhaustion.

2. Direct Red 23 can be used to dye silk and wool. The dyed silk fabric is lighter than the upper dyed cotton and viscose fiber yellow, and can be dyed with Jiaming powder and acetic acid. Cotton, viscose and other When the fiber is dyed in the same bath, the wool is much lighter than the cotton and viscose fiber, the nylon is heavily stained, and the diacetate and polyester are slightly stained.

3. Direct Red 23 can be used for direct printing of cotton or viscose fabric, plus urea and disodium hydrogen phosphate to adjust the color paste.Can also be used for silk fabric printing.

4. Direct Red 23 is also used for color matching with yellow, orange, red and brown dyes. It is used for dyeing cotton or viscose fiber.When the dark color is dyed slowly, it is easy to control, the light color is dyed very fast, and due to the poor transferability, it is easy to produce color flowers, which should be noted.

Package: 25KG/DRUM, CARTON BOX, BAG