Dear sir/madam,I'm looking for the following products below in quantities of 1-25 kg CAS 3600-86-0 CAS 90717-16-1 CAS 1451-82-7 CAS 459-03-0.Samples are required before buying. If everything is alright, we will order more weekly.Thanks,re required before buying. If everything is alright, we will order more weekly.Thanks,Show More