sec-Butyllithium, 1.3M sol. in cyclohexane/hexane (92/8), AcroSeal®..
Selenious acid, 99.999%, (trace metal basis)..
Selenium standard solution, for AAS, 1 mg/ml Se in 10% HCl..
Selenium(IV) oxide, 99.8%, (trace metal basis)..
Selenium(IV) oxide, 99.999%, (trace metal basis)..