Sulphur Blue 13

Sulphur Blue 13 is Dark blue to blue,Navy blue powder. Insoluble in water, moderate soluble in sodium sulfide solution, for green yellow. In concentrated sulfuric acid to green light blue, dilution of dark after precipitation. Dyeing content in alkaline insurance powder for green light yellow, after oxidation can restore the original colour and lustre; In Sodium hypochlorite solution all fade, join concentrated sulfuric acid into black.

A cost-effective sulphur dye for cellulosic fibers delivering deep blue shades with dependable wash performance and flexible packing options.

Relative name

Sulphur Blue BBF;Indigo RC;Sulphur Indigo R;Hydron Blue FG Stabilosol;

Why choose our Sulphur Blue 13?

• Consistency batch-to-batch for predictable production runs.
• Waste minimization guidance and practical reduction recipes.
• Flexible packaging and export-ready documentation.
• Dedicated technical team for recipe optimization and troubleshooting.

Applications:

Mainly used for cotton, hemp, viscose and vinylon/cotton blended fabric dyeing, also can be used for leather and paper dyeing.

Typical Sulphur Dyeing Process (overview)

• Reduction to leuco form: Reduce dye with an alkaline reducing agent (e.g., sodium hydrosulfite) under controlled conditions to form soluble leuco-sulphur.
• Application: Pad or Exhaust the leuco solution onto cotton/viscose yarns or fabrics with recommended alkali level and liquor ratio.
• Oxidation / Rinsing: Oxidize (air/bleach gently) to regenerate insoluble dye within fiber, then rinse until liquor is clear.
• After-treatments: Soaping and mild oxidizing/neutralising steps to improve fastness and remove unfixed dye.

Note: Exact recipe and dosing depends on equipment and substrate. Our technical team can provide a mill-scale recipe.

Technical Specifications

• ‍Product Name: Sulphur Blue 13
• C.I. No.: 53450
• CAS No.: 1327-59-9
• Shade: Dark blue to blue‍

Package

25KG/DRUM, CARTON BOX, BAG

Regulatory & Safety

Material safety depends on processing chemicals (reducers, alkalis). Provide SDS to downstream users and follow local regulations for disposal of spent baths and effluents.

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.