598-12-9 AI3-19009 Bis(methylguanidinium) sulphate EINECS 209-918-8 Guanidine, methyl-, sulfate (2:1) Index: Guanidine, methyl-, sulfate (2:1) Methylguanidine sulfate (VAN) N1-Methylguanidine sulfate (2:1) NSC 3803