L 1617 (OTTO) Lithium sulphate, GR 99%+ Cas 10102-25-7 - used to treat bipolar disorder. L 1617 (OTTO) Lithium sulphate, GR 99%+ Cas 10102-25-7 - used in ultrasound-type non-destructive testing because they are very efficient sound generators. IL 1617 (OTTO) Lithium sulphate, GR 99%+ Cas 10102-25-7 - used in building blocks and chemical synthesis.