Vat orange 7 dye is a classic anthraquinone vat dyes, known for its excellent color fastness, especially light fastness and chlorine bleaching fastness. It belongs to a class of dyes that require dissolution through a reduction reaction under alkaline conditions to dye fibers, mainly used for dyeing cellulose fibers such as cotton, linen, and viscose

1. Basic information

·Color Index (CI) Index Number: C.I. Vat Orange 7

·CAS Registration Number: [4424-06-0]

·Molecular formula: C₂₄H₁₀N₂O₂

·Chemical structure type: anthraquinone amide

·Appearance: Typically orange to reddish orange powder or granules.

2. Vat orange 7 features and performance

1. Excellent color fastness:

·Light Fastness: Extremely excellent, typically reaching levels 7-8 (up to level 8), making it ideal for textiles that require prolonged exposure to sunlight, such as outdoor furniture fabrics, sunshades, car interior fabrics, etc.

·Washing Fastness: Very good, usually up to 4-5 levels (with a maximum of 5 levels).

·Chlorine Fastness: Excellent performance, surpassing many other types of dyes.

·Rubbing Fastness: Good.

2. Bright color light: can provide bright and pure orange.

3. Application scope: Mainly used for dyeing cellulose fibers, it can also be used to manufacture organic pigments.

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