5 components: 100ug/ml each of Simazine [CAS:122-34-9] ; Terbuthylazine [CAS:5915-41-3] ; Terbutryn [CAS:886-50-0] ; Irgarol 1051 [CAS:28159-98-0] ; Atrazine [CAS:1912-24-9] in Acetone