0-13-00-00001 (Beilstein Handbook Reference) 1,2-Cyclohexanediamine 1,2-Cylohexanediamine 1,2-DIAMINOCYCLOHEXANE 694-83-7 BRN 0506142 Cyclohex-1,2-ylenediamine EINECS 211-776-7 HSDB 5748