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| 4-Amino-5-phenyl-4H-1,2,4-triazole-3-thiol Basic information |
| 4-Amino-5-phenyl-4H-1,2,4-triazole-3-thiol Chemical Properties |
| Melting point | 195 °C (dec.) (lit.)
211-215 °C (dec.) | | Boiling point | 309.4±25.0 °C(Predicted) | | density | 1.47±0.1 g/cm3(Predicted) | | pka | 8.49±0.20(Predicted) |
| Hazard Codes | Xi | | Risk Statements | 36/37/38 | | Safety Statements | 26-36 | | WGK Germany | 3 |
| 4-Amino-5-phenyl-4H-1,2,4-triazole-3-thiol Usage And Synthesis |
| Preparation | Synthesis of 4[amino]-5-phenyl-4H-1,2,4-triazole-3-thiol: A suspension of potassium salt dithiocarbazinate (4.44g, 0.02M), hydrazine hydrate (2ml, 0.04M) and water (80ml) was refluxed for 3 hrs. The color of the reaction mixture changed to green, hydrogen sulphide was evolved and a homogenous solution resulted. A white solid was precipitated by dilution with cold water (100ml) and acidification with concentrated hydrochloric acid. The product was filtered, washed with cold water (2×30 ml) and recrystallised from ethanol in 42 % yield. Melting point : 198 -200°C.IR (KBr cm-1): 943 (N-C-S str), 1278 (N-N-C str), 3365(N-H str), 696 (C-S str), 3082 (Ar CH str), 1446 (C-N str). NMR (ppm): 7.7 (m, 5H, Ar-H), 7.9 (s, 2H, NH2), 14.6(s, 1H, S-H). | | Synthesis Reference(s) | Journal of Heterocyclic Chemistry, 13, p. 925, 1976 DOI: 10.1002/jhet.5570130450The Journal of Organic Chemistry, 47, p. 2757, 1982 DOI: 10.1021/jo00135a014 |
| 4-Amino-5-phenyl-4H-1,2,4-triazole-3-thiol Preparation Products And Raw materials |
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