2G Acid (2-Naphthylamine-5,7-Disulfonic Acid)
CAS Number: 93-00-5
2G Acid (2-naphthylamine-5,7-disulfonic acid) is a disulfonated naphthalamine that functions as a diazo component in direct and reactive dye synthesis, primarily for blue, grey, and black shades on cotton. Its two sulfonic groups at positions 5 and 7 provide high water solubility and strong fiber affinity, producing dyes with excellent leveling and wash fastness properties. Chemzip supplies 2G Acid for complex multi-component dye formulations.
Technical Specifications
| appearance | Brown powder |
| purity (%) | ≥90.0 |
| moisture (%) | ≤5.0 |
| sulfonate (meq/g) | ≥5.8 |
Applications
- Blue and grey direct dye synthesis for cotton printing
- Reactive dye intermediate for deep-shade cellulosic fibers
- Black dye component in polyazo systems
- Acid dye synthesis for deep-blue wool shades
- Textile auxiliary and aftertreatment agent synthesis
Key Features
- Disulfonic structure provides superior dye bath solubility over mono-sulfonated analogues
- Key component in navy and black polyazo dye formulations
- Consistent batch quality validated by HPLC analysis
- Flexible packing options from 25 kg bags to 1 MT big bags
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CAS Number
93-00-5
Category
Dye / Pigment IntermediatesAvailability
In StockSample
Dispatched within 5 days