rubber antioxidant 6PPD( 4020) / rubber chemicals 6PPD( 4020) Commodity Name : Rubber Antioxidant 4020( 6PPD) Chemical Name : N - ( 1 , 3 - dimethylbutyl ) - N' - phenyl - p - phenylenediamine CAS NO.: 793-24-8 Application : Mainly used in manufacture of tires , rubber shoes and other rubber products Quality standard : HG/ T 3644-1999 ITEM QUALITIED GRADE Appearance Dark purple pastilles.Dark purple pastilles. Melting Point 45.0 MIN Heating loss 0.50% MAX Ash 0.15% MAX Assay( GC) 96.0% MIN Solidifying point 45.5 MIN Packing : 20Kg net , paper bag