Ponceau 3R(CAS: 3564-09-8)

Ponceau 3R is a red azo dye with a molecular weight of approximately 512.34 g/mol. It is slightly soluble in water and ethanol. Ponceau 3R is known for its low reactivity and stability under various conditions, making it suitable for food and textile dyeing. It is also stable under acidic and alkaline conditions, with good light and heat resistance.

Ponceau 3R is synthesized through a multi-step process involving the coupling of an aromatic amine with an azo coupling agent. The reaction is typically carried out in organic solvents like methanol or ethanol under acidic conditions. The yield is around 70-80%, and the process involves careful control of temperature and pH to ensure high selectivity and purity.

Ponceau 3R is widely used in the food industry as a red food dye, particularly in the production of sauces and condiments. It is also utilized in the textile industry for dyeing fabrics and in the plastics industry as a colorant. Additionally, it has applications in the pharmaceutical industry, where it is used as a dye in capsules and tablets.

Ponceau 3R should be handled in a well-ventilated area with proper personal protective equipment (PPE), including gloves, safety glasses, and a lab coat. It is recommended to work in a fume hood to minimize inhalation risks. Spills should be cleaned up using appropriate absorbents, and the area should be thoroughly washed down. Always refer to the Safety Data Sheet (SDS) for specific handling and disposal instructions.