Larionov, S. V. published the artcileReaction of 2,4-dithiobiuret with copper(II), silver(I), cadmium(II) and mercury(II) ions, Safety of Formamidine disulfide dihydrochloride, the publication is Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk (1967), 84-8, database is CAplus.
2,4-Dithiobiuret [HN:C(SH)NHC(SH):NH] (I) is determined by potentiometric titration with either iodine or with H2NC(:NH)SSC(:NH)NH2.2HCl (II). In each case I is converted to III. In the titration with iodine conducted in boiling water, the error is ∼1%. In the titration with II the error is ∼0.3%. Treatment of 0.27 g. of I in 15 ml. of 96% EtOH with a solution of 0.5 g. of CuSO4.5H2O and 1 ml. of 57% HClO4 in 200 ml. H2O (pH ∼2) or in aqueous EtOH yielded a flocculent greenish precipitate, which did not alter on standing. After 30-40 min. the precipitate yielded 0.2 g. CuC2H2N3S2. In a 50% aqueous solution of Me2CO, containing 0.1M HClO4, the reaction of Cu(ClO4)2 with I generated its most intense color (in the 400-550 mμ range) at a molar ratio of about 1:4. Cd(II) in ammoniacal solution reacted with I to give a white precipitate, which rapidly became yellow, presumably due to CdS formation. The reaction of Hg(ClO4)2 with I was followed potentiometrically. A greenish yellow precipitate, corresponding to 1:1 molar stoichiometry, formed and rapidly became black on standing. Titration of I with Ag salts did not give reproducible results.
Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C2H8Cl2N4S2, Safety of Formamidine disulfide dihydrochloride.
Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem