Pigment Yellow 181(CAS: 74441-05-7)

Pigment Yellow 181 (CAS: 74441-05-7) is a yellow organic pigment. It has a crystalline form and a molecular weight of approximately 474.4 g/mol. It is poorly soluble in water but soluble in organic solvents. Chemically, it has good light and heat stability, and minimal migration properties, making it suitable for a variety of applications.

Pigment Yellow 181 (CAS: 74441-05-7) is synthesized through a multistep process, including condensation and oxidation reactions. Commonly, it involves the reaction of 2,5-bis(2-hydroxy-3-sulfophenyl)-1,3,4-thiadiazole with 4,4-dichloro-2,2-bis(2,5-dihydroxyphenyl)sulfone, followed by further processing to achieve the desired pigment form. This process typically uses specific catalysts to improve yield and selectivity.

Pigment Yellow 181 (CAS: 74441-05-7) is widely used in the textile, printing ink, and plastics industries due to its excellent light and heat stability. It is also utilized in coatings and paper coloring, providing vibrant yellow hues. Additionally, it can be found in some pharmaceutical and cosmetic products for coloring purposes.

When handling Pigment Yellow 181 (CAS: 74441-05-7), it is important to wear appropriate personal protective equipment such as gloves and goggles. Store it in a cool, well-ventilated area, away from sources of ignition and incompatible materials. If a spill occurs, avoid direct contact and use appropriate spill kits or absorbents to contain the material. Always refer to the Safety Data Sheet (SDS) for detailed handling and safety information.