Product description:
Vat direct black RB is insoluble in water, purple in concentrated sulfuric acid, and black after dilution. The alkaline reductive leucosome is dark blue; Acid reducing leucosome is reddish brown.
Product parameter:
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Synonyms
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Vat Black RB
Vat Black 9 C.I. Vat Black 9 Vat Direct Black RB Vat black 9 (C.I. 65230) C.I. 65230 Dycosthren Black RB Indonon Direct Black RB Mikethrene Direct Black RB Trianthrene Direct Black RB. Nihonthrene Direct Black BRL Sandothrene Liquid Direct Black NOM |
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CAS No. |
1328-25-2
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EINECS No.
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215-520-5
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C.I. No.
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65230
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Molecular Formula
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C126H58O10N4
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Appearance
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Black powder
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Application
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It is mainly used for the dyeing of cotton fiber, suitable for pad dyeing of suspension, and can match with other dyes to dye
various grays. The leucophore mainly dyes yarn. It can also be used for the dyeing of silk and polyester/cotton blended fabrics, and also for the dyeing of black and dark gray of polyester/cotton and polyester/viscose blended fabrics |
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Density
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1.56g/cm3
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Water solubility
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2.7mg/L at 20℃
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Diffusivity
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≥ Grade 3
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Product picture:
Application of VAT Dyes:
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