Schaeffer's Acid (2-Naphthol-6-Sulfonic Acid)
CAS Number: 93-01-6
Schaeffer's Acid is a naphthol monosulfonic acid coupling component used in the synthesis of scarlet, red, and orange azo dyes for textile and leather applications. Its hydroxyl group at position 2 and sulfonic acid at position 6 create a coupling component that gives brilliant red shades with good dyeing affinity. Chemzip offers high-quality Schaeffer's Acid for azo dye producers seeking vivid red color formulations.
Technical Specifications
| appearance | White to pale cream crystalline powder |
| purity (%) | ≥95.0 |
| moisture (%) | ≤2.0 |
| sulfonate content (meq/g) | ≥4.2 |
Applications
- Scarlet and bright red azo dye synthesis for cotton
- Acid dye coupling component for wool in red shades
- Direct dye intermediate for cotton and viscose
- Leather dye for bright red automotive upholstery leather
- Paper dye formulation
Key Features
- Brilliant red coupling capability with high dye extinction coefficient
- Stable in alkaline coupling conditions without decomposition
- Compatible with a wide range of diazo components for shade tuning
- Samples available for laboratory trial formulations
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CAS Number
93-01-6
Category
Dye / Pigment IntermediatesAvailability
In StockSample
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