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Vat Red k

Updated: 2026-08-03

Overview

Vat Scarlet K is a synthetic vat dye belonging to the anthraquinone class, known for its vibrant red hue. It is extensively used in the textile industry due to its excellent color fastness and resistance to fading. The dye is insoluble in water but can be solubilized in alkaline solutions, making it suitable for vat dyeing processes. Developed for industrial applications, Vat Scarlet K is particularly favored for dyeing cotton and viscose fabrics. Its chemical stability and high affinity for cellulose fibers ensure long-lasting and uniform coloration. The dye is also used in printing applications, where it provides bright and consistent shades.

Physical and Chemical Properties

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Vat Scarlet K appears as a red to dark red powder with a molecular weight of 442.42 g/mol. It is insoluble in water but dissolves in alkaline solutions, forming a leuco compound that is absorbed by fibers during the dyeing process. The dye exhibits high thermal stability, decomposing at approximately 300°C. Key chemical properties include its resistance to light, washing, and perspiration, making it ideal for textiles exposed to harsh conditions. The dye's molecular structure, featuring anthraquinone groups, contributes to its vibrant color and durability. Its solubility in alkaline solutions allows for easy application in vat dyeing, where it is reduced to a soluble form before oxidizing back to its insoluble state on the fabric.

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Main Applications

Vat Scarlet K is primarily used in the textile industry for dyeing and printing cotton, viscose, and other cellulose-based fabrics. Its bright red color and excellent fastness properties make it a popular choice for apparel, home textiles, and industrial fabrics. The dye is particularly valued for its ability to produce consistent and long-lasting shades. In addition to textiles, Vat Scarlet K finds limited use in paper dyeing and leather coloring. Its high affinity for cellulose ensures deep penetration and uniform coloration. The dye is also employed in specialty applications where color stability under harsh conditions is required, such as in outdoor fabrics and workwear.

Safety and Storage

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Vat Scarlet K should be handled with care to avoid inhalation or skin contact, as it may cause irritation. Proper protective equipment, including gloves and masks, should be worn during handling. The dye should be stored in a cool, dry place away from direct sunlight and moisture to prevent degradation. In case of accidental exposure, affected areas should be rinsed thoroughly with water. Spills should be contained and cleaned up promptly to prevent environmental contamination. The dye is not highly toxic but should be disposed of in accordance with local regulations to minimize environmental impact.

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B2B Procurement Guide

When procuring Vat Scarlet K, buyers should verify the CAS number (6370-90-5) and ensure the product meets required purity standards. Reputable suppliers should provide certificates of analysis and compliance with industry regulations. Price ranges vary depending on purity and quantity, typically between $20-$50 per kilogram. Buyers should also consider the dye's compatibility with their specific dyeing processes and equipment. Bulk purchases may offer cost savings, but storage conditions must be adequate to maintain product quality. It is advisable to request samples for testing before large-scale procurement to ensure the dye meets performance expectations.

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