Gamma-Acid (7-Amino-1-Naphthol-3-Sulfonic Acid)
CAS Number: 90-51-7
Gamma-Acid is a naphthalene sulfonic acid derivative used as a coupling component in the synthesis of direct, acid, and reactive azo dyes, primarily in yellow-green to green shade ranges. Its amino and hydroxyl groups at positions 7 and 1 provide a specific geometric arrangement that directs coupling toward characteristic greenish hues. Chemzip offers consistent-grade Gamma-Acid for textile dye manufacturers.
Technical Specifications
| appearance | Light beige to brown powder |
| purity (%) | ≥90.0 |
| moisture (%) | ≤3.0 |
| coupling value (mEq/g) | ≥3.5 |
Applications
- Direct dye synthesis in yellow-green and olive shade range
- Acid dye coupling for wool and silk in green tones
- Reactive dye intermediate for cellulosic fibers
- Chrome complex dye synthesis
- Specialty paper dye intermediate
Key Features
- Unique positional isomer enabling greenish hue dyes not achievable with H or J acid
- Standardized coupling value for batch-to-batch formulation consistency
- Low soluble impurities prevent dye bath contamination
- Technical support for dye synthesis optimization available
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CAS Number
90-51-7
Category
Dye / Pigment IntermediatesAvailability
In StockSample
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