产品描述:
4-Hydroxydiphenylamine (4-HDPA) is an aqueous transformation product of the substituted p-phenylenediamine and antiozonant 6-PPD (Item No. 38246).{66703} It is also a biotransformation product of 6-PPD in zebrafish embryos and an active metabolite of the antioxidant and pesticide diphenylamine (Item No. 24250).{67731,67732} 4-HDPA scavenges carbon radicals in an AIBN-induced methyl methacrylate polymerization assay in a concentration-dependent manner.{67733} It has been found in tire wear particles, roadway runoff, and roadway-impacted creeks.{66703}