1,1'-(p-Phenylenebis(methylidynenitrilo))diguanidine dihydrochloride 1945-65-9 7044-24-8 Guanidine, 1,1'-(p-phenylenebis(methylidynenitrilo))di-, dihydrochloride Hydrazinecarboximidamide, 2,2'-(1,4-phenylenedimethylidyne)bis-, dihydrochloride (9CI) N,N-(p-Xylylidene)bisaminoguanidine dihydrochloride NSC 66832