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                                Phthalic anhydride                            
                        
                        
                                                            Catalog No.:W810148 Spec/Purity:99.5% CAS No.: 85-44-9 Molecular Weight:148.12 
 
 
 
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                                Carbic anhydride                            
                        
                        
                                                            Catalog No.:D060003 Spec/Purity:98% CAS No.: 129-64-6 Molecular Weight:164.16