ualun Chemical Company in Lianyungang, Jiangsu Province, China produces Terephthalaldehyde ( Terephthaldicarboxaldehyde,1,4-Phthalaldehyde) abbre.TPP , which is a key raw material for producing fluorescent brightener.It can also be used in synthetic dyes and medicines; fine chemial intermediate. Some key detail information of such a product as follows:<br />CAS NO. 623-27-8<br />Chemical formula: C8H6O2<br />Molecular Weight:134.132<br />Appearance: Pale yellow or white crystalline qranule.<br />Assay: ≥ 99.0%<br />Maximum content of single impurity : ≤ 0.05%<br />Residual moisture content : ≤ 0.05%<br />Melting point: 112-117℃.<br />Package: 25KG/fiber can, lined with plastic bag or packed according to customer