Overview
Basic Yellow 1, also known as Auramine O, is a synthetic cationic dye belonging to the diarylmethane class. It is commonly used in industrial applications due to its vibrant yellow color and strong affinity for substrates like textiles and paper. The dye is also utilized in biological staining for microscopy. The compound was first synthesized in the late 19th century and has since become a staple in various industries. Its cationic nature allows it to bind effectively to negatively charged materials, making it a popular choice for dyeing acrylic fibers and other synthetic fabrics.
Physical and Chemical Properties
Basic Yellow 1 appears as a yellow crystalline powder with a molecular weight of 303.83 g/mol. It is soluble in water and ethanol, which facilitates its use in aqueous dyeing processes. The dye exhibits fluorescence under ultraviolet light, a property leveraged in certain staining applications. Its melting point is around 250°C, but it tends to decompose at this temperature rather than melt cleanly. The compound is stable under normal storage conditions but may degrade when exposed to prolonged light or moisture. Its high tinting strength means even small quantities can produce intense coloration.
Main Applications
The primary use of Basic Yellow 1 is in the textile industry, where it dyes acrylic fibers, wool, and silk. Its cationic nature ensures excellent color fastness on these materials. The paper industry also employs this dye for coloring specialty papers, including security papers and decorative items. In biology and medicine, Basic Yellow 1 serves as a fluorescent stain for microscopy, particularly in visualizing bacteria and cellular structures. Its ability to bind to nucleic acids makes it useful in certain diagnostic applications. However, due to potential health risks, its use in consumer products is limited.
Safety and Storage
Basic Yellow 1 is classified as a potential carcinogen, requiring careful handling. Workers should use personal protective equipment (PPE), including gloves, goggles, and masks, to avoid inhalation or skin contact. Proper ventilation is essential in areas where the dye is processed or used. Storage conditions are critical to maintaining the dye's stability. It should be kept in a cool, dry place, away from direct light and moisture. Containers must be tightly sealed to prevent contamination and degradation. Spills should be cleaned immediately using appropriate absorbents and disposed of according to local regulations.
B2B Procurement Guide
When procuring Basic Yellow 1, buyers should prioritize suppliers who provide detailed product specifications, including CAS number (2465-27-2) and purity levels. Compliance with regional safety and environmental regulations is essential, as restrictions may apply due to the dye's hazardous classification. Price ranges vary depending on quantity and purity, typically between $20-$50 per kilogram. Bulk purchases may qualify for discounts. Buyers should also consider logistical factors, such as packaging (e.g., moisture-resistant bags) and shipping conditions, to ensure product integrity upon arrival.
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