CAS · 119-90-4
Product Overview
3,3-Dimethoxybenzidine is a high-purity pharmaceutical-intermediates supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance: | Pale brown powder |
|---|---|
| Purity: | 98.0% min |
| Assay: | 98% min |
| Identification - HPLC retention time: | The retention time of the major peak in the chromatogram of the assay preparation corresponds to that in the chromatogram of the standard preparation |
| Identification - ¹H NMR: | Report result |
| Individual impurity: | 1.0% max |
| Total impurity: | 2.0% max |
Applications
3,3-Dimethoxybenzidine is an important aromatic diamine primarily used as an intermediate in the synthesis of dyes, pigments, polymers, and specialty chemicals. It serves as a key building block for azo dyes, disperse dyes, and vat dyes, contributing to bright, stable, and colorfast chromophores. In polymer chemistry, 3,3-dimethoxybenzidine is employed in the preparation of polyimides, polyurethane, and epoxy resins, providing rigidity, thermal stability, and enhanced mechanical properties. It is also used in the synthesis of advanced materials, including conducting polymers and functional dyes for electronics and optical applications. Its methoxy substituents enhance solubility and reactivity, allowing selective functionalization for the preparation of complex aromatic compounds. Additionally, it serves as a reagent in chemical research for constructing heterocycles, cross-coupling reactions, and other synthetic transformations in laboratory and industrial settings.
Benefits
The benefits of 3,3-dimethoxybenzidine arise from its bifunctional amino groups, methoxy substituents, and chemical stability. Its diamine functionality provides two reactive sites for azo coupling, polymerization, or condensation reactions, enabling efficient formation of dyes, polymers, and heterocycles. The methoxy groups improve solubility in organic solvents, enhancing processability and compatibility with various reagents and formulations. Its aromatic structure confers thermal stability, rigidity, and durability to the resulting polymers and dyes, ensuring long-lasting performance. Moreover, 3,3-dimethoxybenzidine allows selective chemical modifications, which reduces byproducts, improves yield, and increases efficiency in synthesis. Its versatility makes it suitable for both large-scale industrial production and precise laboratory research.
Conclusion
3,3-Dimethoxybenzidine (CAS 119-90-4) is a versatile diamine intermediate widely used in the production of dyes, pigments, polymers, and specialty chemicals. Its bifunctional reactivity, solubility, and chemical stability make it indispensable for efficient synthesis of high-performance materials and colorants. By enabling selective functionalization and delivering thermal and mechanical stability, 3,3-dimethoxybenzidine plays a critical role in industrial applications and chemical research, supporting the development of advanced materials and innovative synthetic pathways.
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