The world of industrial and laboratory chemicals is vast, with each compound possessing unique properties that dictate its utility. Basic Green 4 (CAS 2437-29-8), also widely known as Malachite Green oxalate, is a synthetic organic dye belonging to the triarylmethane class. Its vibrant green color and chemical characteristics make it a staple in various applications, from textiles to microscopy. For procurement managers and R&D scientists, understanding the chemistry behind this dye is key to making informed purchasing decisions.

Chemical Structure and Synthesis of Basic Green 4

Basic Green 4's brilliant green hue is a result of its molecular structure. As a triarylmethane dye, it features a central carbon atom connected to three aromatic rings, creating an extended system of conjugated pi bonds. This extended conjugation is responsible for absorbing light in the visible spectrum, specifically around 618-621 nm, leading to its characteristic color. The synthesis typically involves the condensation of benzaldehyde with two equivalents of N,N-dimethylaniline to form leuco malachite green. This colorless precursor is then oxidized, often with manganese dioxide, in the presence of acid to yield the colored cation, Malachite Green. The commercially available forms are usually salts, such as the chloride or oxalate salt.

Key Chemical and Physical Properties

From a chemical supplier's perspective, the properties that make Basic Green 4 desirable for B2B clients include:

  • Appearance: Typically a green powder.
  • Solubility: Soluble in water and alcohol, facilitating its use in aqueous and alcoholic solutions for dyeing and staining.
  • pH Sensitivity: While primarily known for its color, it can also act as a pH indicator within specific narrow ranges, though this is a less common application.
  • Stability: It is generally stable under recommended storage conditions (cool, dry, light-resistant place).
  • Reactivity: As a basic dye, it readily binds to anionic sites on substrates.

These properties underpin its effectiveness in textile dyeing, leather treatment, paper coloration, and importantly, as a stain in biological laboratories for bacteria and endospores.

Sourcing Quality Basic Green 4

When you need to buy Basic Green 4, selecting a reputable manufacturer and supplier like NINGBO INNO PHARMCHEM CO.,LTD. is crucial. We ensure that our product meets high purity standards, which is essential for consistent color vibrancy and reliable performance in staining protocols. Our commitment to quality control means that each batch of Basic Green 4 is tested to meet stringent specifications. We offer competitive pricing for bulk orders, supporting the operational needs of industries and research institutions. By providing detailed product information and reliable supply, we aim to be your preferred partner for specialty chemicals.

For those looking to purchase Basic Green 4, inquiring about our product range and obtaining a quote will ensure you access a high-quality chemical solution supported by expert service.