Sulphur Blue 15

Industrial-grade sulphur dye engineered for deep navy and saturated blue shades on cotton, viscose and blends.

Sulphur Blue 15 is Blue gray powder. Slightly soluble in water, not soluble in alcohol and benzene, soluble in Sodium sulfide solution for olive. In concentrated sulfuric acid for dark blue, dark blue precipitation after dilution. Dyeing content in alkaline insurance powder for dark yellow, after oxidation can restore the original colour and lustre; In Sodium hypochlorite solution all fade, join concentrated sulfuric acid into dark blue.

Relative name

Sulphur Blue CV;Sulphur Blue 3G;Sulphur Blue 7G;

Main feature

• ‍Consistent depth: Engineered for predictable shade repeatability across batches.
• Economical process: Low add-on and efficient coverage for production-scale operations.
• Mill support: We provide dosing tables, reduction schedules and troubleshooting for first trials.‍

Applications:

Mainly used for cotton, hemp, viscose fiber dyeing and printing.

How to apply — condensed process (for experienced mills)

• Prepare alkaline reduction bath and convert Sulphur Blue 15 to its leuco form under controlled temperature.
• Apply by padding, exhaust or package methods with specified liquor ratio.
• Oxidize by air or mild oxidizer, rinse thoroughly, then neutralize and soap to fix dye and remove unfixed residues.

We recommend trial runs at pilot scale and adherence to local effluent guidelines.

Technical Specifications

• ‍Product Name:Sulphur Blue 15
• C.I. No.: 53540
• CAS No.: 1327-69-1
• Shade: Green light blue‍

Package

25KG/DRUM, CARTON BOX, BAG

Compatibility & limitations

Sulphur Blue 15 is formulated for cellulosic fibers — not suitable for polyester, wool or silk. Avoid strong oxidizing agents during storage.

Packaging & transportation

Standard kraft or multiwall bags. For export, consolidated pallets and documentation can be provided. Inform us of shipping mode for hazard classification guidance.

Note: The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.