Vat Yellow 33

Var yellow 33 is Yellow powder. Alkaline reduction for the red light purple leuco , acidity reduction leuco for yellow.

Vat Yellow 33 is a classical vat dye grade chosen where a bright and durable yellow is required on cellulosic substrates.              It is formulated for easy vatting and stable performance in commercial dyehouses. Our grade focuses on: reliable tinctorial strength,              low speck and minimal migration in both continuous and batch processes.

Key benefits

• Bright, clean yellow shade with excellent levelness
• Excellent wash fastness and good light fastness
• Low migration in printing paste and finished goods

Applications

• Exhaust vat dyeing of cotton and viscose
• Printing (vat pigment paste systems)
• Special finishes and high-temperature processes

Supply forms

• Powder (standard micron size)
• Wet paste (25%–50% solids)
• Micronized dispersion for improved reactivity

Application & Processing Guide — High Level

• Vatting: Convert Vat Yellow 33 to its soluble leuco form using an appropriate reducing agent (eg. sodium dithionite) in an alkaline vat (commonly NaOH). Maintain controlled temperature and pH during reduction to avoid over-reduction or hydrolysis.
• Dyeing/Printing: Use recommended carrier systems or pad-dry-steam for printing. After application, oxidize (air or hydrogen peroxide systems) to regenerate the insoluble form locked onto the fiber. Rinse and apply standard after-treatments to improve fastness.
• Important — the above is a simplified overview. Always follow lab-scale trials and your dyehouse safety procedures. For production recipes and optimized vat recipes for reactive blends/contact with synthetics, consult our technical team.

Technical Specifications

• ‍Product Name:Yellow F3G(Vat Yellow 33)
• C.I. No.: 65429
• CAS No.: 12227-50-8
• Molecular Formula: C54H32N4O6
• Molecular Weight: 832.86
• Shade: Bright yellow
• Relative name:Vat Yellow 33;Vat Yellow 3GC;Vat Yellow F3G;Vat Yellow F3GC;Cibanon Yellow 2GN;‍

Package

25KG/DRUM, CARTON BOX, BAG

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.