Basic information

Chinese name: Vat red 15
CAS number: 6371-55-7
Chemical category: anthraquinone vat dyes
Molecular formula: C ∝₄ H ₁₈ N ₂ O ₄
Appearance: Deep red powder or granules
Application areas: Mainly used for textile printing and dyeing (cellulose fibers such as cotton, linen, and viscose), and can also be used for dyeing paper and leather.

Product characteristics
Dyeing performance:
-Excellent reducing solubility requires the formation of a dark colored dye on fibers under alkaline conditions (such as reducing with insurance powder).
-After dyeing, it is oxidized to restore its original color, with bright hues and excellent fastness.
-Color light: The standard color is bright red, and the depth can be adjusted according to the process.
-Fastness performance:
-Washing fastness: 4-5 levels (excellent)
-Light fastness: 5-6 grades (high grade)
-Rubbing fastness: 3-4 levels

Vat Red Dyes Application
-Restoration process:
1. Reduction dissolution: The dye is reduced to a chromophore in a solution of NaOH and sodium hydrosulfite (Na ₂ S ₂ O ₄).
2. Dyeing: The chromophore adsorbs onto the fiber (20-50 ℃).
3. Oxidation: Treatment with air or oxidants (such as hydrogen peroxide) to restore insoluble dyes.
4. Soap washing: Remove floating colors and improve fastness.
-Applicable processes: immersion dyeing, pad dyeing, and roll dyeing.

Environmental Protection and Safety
-Environmental friendliness: Complies with international environmental standards (such as OEKO-TEX) ®）， Does not contain prohibited aromatic amines.
-Storage: Sealed, away from light, moisture, and kept away from strong acids/oxidants.
-Safety reminder: Wear protective equipment to avoid inhaling dust.

Packaging and Specifications
-Packaging: 25kg/bag (cardboard drum or woven bag lined with plastic bag).
-Customized services: providing color cards, technical guidance, and sample testing.

Market advantage
-High cost-effectiveness, suitable for mid to high end textiles;
-Compared with similar products such as Vat red 1 and Vat Red 41, the color light is more stable.