Product description:
Vat Brown BR is a dark brown powder. It is mainly used for dyeing and printing cotton, linen, silk and viscose, and is commonly used for dyeing cotton yarn.
Product parameter:
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CAS No. |
2475-33-4
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EINECS No.
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219-599-7
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C.I. No.
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70800
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Molecular Formula
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C42H18N2O6
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Molecular Weight
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646.6021
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Appearance
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Dark brown powder
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Application
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Mainly used for dyeing and printing of cotton, linen and viscose fabrics. It can be used widely with other VAT dyes.
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Density
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1.67g/cm3
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Solubility
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Insoluble in water. Slightly soluble in hot tetrahydronaphthalene and hot xylene, insoluble in cold xylene. It is grayish green in concentrated
sulfuric acid and has a brown precipitate after dilution. Alkaline reductive cryptochromes are yellowish-brown; Acid reduction cryptochromes are dark olive |
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Boiling point
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675.58°C
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Refractive index
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1.4670
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Acidity coefficient
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11.33±0.20
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Product picture:
Application of VAT Dyes:
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