Optical Brightening Agent WS

Main Chemical Composition: Coumarin Derivatives
Specification:  Appearance: Off-white powder
              Content: ≥99%
              Melting Point: 69.5~71.0ºC
              Moisture: ≤0.5%
C.I.Number: 140
Property: 1.multipurpose brightener with excellent whiteness, soluble in ethanol but insoluble in water.
         2.having properties of good solubility and compatibility.

Application: mainly be used as brightener of H-PVC,S-PVC,wool, natural silk, polyamide fiber and acrylic fiber. Also can be used for detergent. This product is a common laser dyestuff.    
Process:
1.H-PVC:0.03-0.1%     S-PVC:0.02-0.08@
2.Soluble with ethanol before adding.
wool: 0.05-0.35%            polyamide fiber: 0.05-0.3%
natural silk: 0.05-0.4%        acrylic fiber: 0.05-0.8%
3.detergent:0.001-0.005%

It needs to be declared that the above data is based on our present knowledge and experience; owing to too many affecting factors, these data cannot be free from their check and test when processing and using the product.