Overview
Basic Green 4, commonly known as Malachite Green, is a synthetic dye belonging to the triarylmethane class. It has been widely used in various industries due to its vibrant green color and antifungal properties. Despite its utility, its use in food-producing animals is banned in many countries due to toxicity concerns. Initially developed as a textile dye, Basic Green 4 has found applications in aquaculture for controlling fungal and parasitic infections. However, regulatory restrictions have limited its use in certain regions, prompting the search for safer alternatives.
Physical and Chemical Properties
Basic Green 4 appears as a green crystalline powder with a molecular weight of 364.91 g/mol. It is soluble in water and ethanol, making it versatile for various applications. The dye exhibits strong absorption in the visible spectrum, contributing to its intense coloration. Its melting point ranges between 112-114°C, and it decomposes at higher temperatures. The compound's stability under normal storage conditions makes it suitable for long-term use, though exposure to light should be minimized to prevent degradation.
Main Applications
Basic Green 4 is primarily used in aquaculture to treat fungal and parasitic infections in fish and shellfish. Its antifungal properties make it effective against Saprolegnia and other pathogens. However, due to its potential carcinogenicity, its use in food fish is prohibited in many countries. In the textile industry, it serves as a dye for silk, wool, and cotton. Additionally, it is used in biological staining to highlight cellular structures under microscopy. Despite its declining use in aquaculture, it remains a valuable tool in research and industrial applications.
Safety and Storage
Basic Green 4 is toxic if ingested or inhaled, and prolonged exposure can cause skin and eye irritation. Proper personal protective equipment (PPE), such as gloves and goggles, should be worn when handling the chemical. Adequate ventilation is essential to avoid inhalation of dust. Storage should be in a cool, dry place, away from direct sunlight and incompatible substances. Containers must be tightly sealed to prevent moisture absorption and contamination. Disposal should comply with local environmental regulations to minimize ecological impact.
B2B Procurement Guide
When procuring Basic Green 4, buyers should verify the product's purity and compliance with regional regulations. Suppliers should provide certificates of analysis (CoA) and material safety data sheets (MSDS). Due to regulatory restrictions, alternative treatments may be required for aquaculture applications. Price varies based on purity and quantity, typically ranging from $20 to $50 per kg. Bulk purchases may offer cost savings, but storage capacity and shelf life should be considered. Establish long-term relationships with reputable suppliers to ensure consistent quality and regulatory adherence.
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