S-Methylisothiourea Sulfate

Chinese Name: S-Methylisothiourea Sulfate

Customs HS Code: 29420000
Chinese Synonyms: 2-Methyl-2-thiopseudourea hydrogen sulfate; 2-Methyl-2-mercaptosulfate urea; S-Methylthioisourea hydrogen sulfate; Methylisothiourea sulfate; S-Methylisothiourea sulfate (2:1); 2-Methylisothiourea sulfate; S-Methylisothiourea; 2-Methyl-2-thiopseudourea hemisulfate
S-Methylisothiourea Sulfate

English Name: 2-Methyl-2-thiopseudourea sulfate
CAS Number: 867-44-7
Molecular Formula: C2H8N2O4S2
Molecular Weight: 188.23 Melting Point 240-244 °C (dec.)(lit.)
Density 1.28 Purity: 98-99%
Water Solubility 260 g/L (20 ºC) Chemical Properties This product is a white solid, decomposes above 244°C, easily soluble in water, poorly soluble in organic solvents, and hygroscopic.
Uses S-Methylisothiourea sulfate is an intermediate for the preparation of guanidines, used in the synthesis of fungicides such as dimethirimol and ethirimol, insecticides like pirimioxyphos and pirimicarb, and in the pharmaceutical industry for producing anticancer drugs such as 5-fluorouracil, mitoguazone, and hydroxyguanidine sulfate, as well as antihypertensive drugs like guanoclor. In the pesticide industry, it is used to produce fungicides such as carbendazim and benomyl, and insecticides including pirimiphos-methyl.