Description: ITEM#:923 FeCl2•4H2O CAS#:13478-10-9 F.W.:198.81 NFPA#:1-0-1 Specific Gravity: 0.000 DOT:8/II Descriptions: Specification TEST 1. Assay (as FeCl2) 62.5 - 66.0% 2. Insoluble 0.01% 3.