Product Name

  • Name

    4-Methyl-1,2,4-triazole-3-thiol

  • EINECS 246-496-4
  • CAS No. 24854-43-1
  • Article Data15
  • CAS DataBase
  • Density 1.442 g/cm3
  • Solubility
  • Melting Point 165-169°C
  • Formula C3H5N3S
  • Boiling Point 135.296 °C at 760 mmHg
  • Molecular Weight 115.159
  • Flash Point 35.626 °C
  • Transport Information
  • Appearance
  • Safety 26-36/37/39
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 24854-43-1 (4-Methyl-1,2,4-triazole-3-thiol)
  • Hazard Symbols IrritantXi
  • Synonyms 4H-1,2,4-Triazole-3-thiol,4-methyl- (7CI);D2-1,2,4-Triazoline-5-thione,4-methyl- (8CI);1-Methyl-2-mercapto-1H-1,3,4-triazole;2,4-Dihydro-4-methyl-3H-1,2,4-triazole-3-thione;2-Mercapto-1-methyl-1,3,4-triazole;2-Mercapto-1-methyl-1H-[1,3,4]triazole;3-Mercapto-4-methyl-1,2,4-triazole;3-Mercapto-4-methyl-4H-1,2,4-triazole;4-Methyl-1,2,4-triazole-3-thiol;4-Methyl-3-mercapto-1,2,4-triazole;4-Methyl-3-mercapto-4H-1,2,4-triazole;4-Methyl-4H-1,2,4-triazole-3-thiol;
  • PSA 69.51000
  • LogP 0.10380

4-Methyl-1,2,4-triazole-3-thiol Chemical Properties


IUPAC Name: 4-methyl-1H-1,2,4-triazole-5-thione 
Molecular Formula: C3H5N3S
Molecular Weight: 115.156900 g/mol
Canonical SMILES: n1(c([nH]nc1)=S)C
InChI: InChI=1/C3H5N3S/c1-6-2-4-5-3(6)7/h2H,1H3,(H,5,7) 
Mol File: 24854-43-1.mol
EINECS: 246-496-4
Classification Code:  Drug / Therapeutic Agent, TSCA Flag P [A commenced PMN (Premanufacture Notice) substance]
XLogP3-AA: 0
H-Bond Donor: 1
H-Bond Acceptor: 1
Rotatable Bond Count: 0
Tautomer Count: 2
Exact Mass: 115.020418
MonoIsotopic Mass: 115.020418
Topological Polar Surface Area: 27.6
Heavy Atom Count: 7
Complexity: 119
Index of Refraction: 1.704 
Molar Refractivity: 31.02 cm3 
Molar Volume: 79.8 cm
Polarizability: 12.29×10-24cm3 
Surface Tension: 48 dyne/cm 
Density: 1.44 g/cm
Flash Point: 35.6 °C 
Enthalpy of Vaporization: 37.27 kJ/mol 
Boiling Point: 135.3 °C at 760 mmHg 
Melting Point: 165-169 °C
Vapour Pressure of 4-Methyl-1,2,4-triazole-3-thiol (CAS NO.24854-43-1): 7.78 mmHg at 25 °C

4-Methyl-1,2,4-triazole-3-thiol Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 1500mg/kg (1500mg/kg)   Chemical and Pharmaceutical Bulletin. Vol. 38, Pg. 2595, 1990.

4-Methyl-1,2,4-triazole-3-thiol Safety Profile

Hazard Codes:  IrritantXi
Risk Statements:  36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements of 4-Methyl-1,2,4-triazole-3-thiol (CAS NO.24854-43-1):  26-36/37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.

4-Methyl-1,2,4-triazole-3-thiol Specification

 4-Methyl-1,2,4-triazole-3-thiol (CAS NO.24854-43-1), its Synonyms are  2,4-Dimethyl-4-methyl-3H-1,2,4-triazole-3-thione ; 3H-1,2,4-Triazole-3-thione, 1,4-dihydro-4-methyl- ; 3H-1,2,4-Triazole-3-thione, 2,4-dihydro-4-methyl- ; 1,4-Dihydro-4-methyl-3H-1,2,4-triazole-3-thione .

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