Brilliant Optical offers high Purity, heat sensitive dyes that meet the demanding needs of CTP Plates applications. All our products go through extensive testing and verification. We will not release a product until it exceeds our high standards for performance.Our dyes are at a price that is much lower than comparable products, giving you the highest value dyes on the market. Our products are available for shipment within days. CTP Sensitization Dye IR813CAS Number: 134127-48-3Chemical formula: C47H47ClN2O3SMW: 755.41Purity: 97%Appearance: maroon crystalsAbsorption: max=813nm(methanol)Type: heat - sensitive materialsApplication: CTP PlatesCTP Sensitization Dye IR775CAS Number: 205744-92-2Chemical formula: C39H43ClN2O3SMW: 655.30Purity: 97%Appearance: Green crystalsAbsorption: max=775nm(methanol)Type: heat - sensitive materialsApplication: CTP Plates