1-(Mesitylene-2-sulfonyl)-3-nitro-1,2,4-triazole (74257-00-4) is also named as MSNT ; Oprea1_756023 ; ZINC00115199 ; 241784_SIAL ; CID716901 ; LT00451933 ; 1-(2-Mesitylenesulfonyl)-3-nitro-1H-1,2,4-triazole ; (2,4,6-Trimethylphenyl) (3-nitro-1,2,4-triazol-1-yl) sulfone , and so on. 1-(Mesitylene-2-sulfonyl)-3-nitro-1,2,4-triazole (74257-00-4) is light yellow solid.

IUPAC Name: 3-Nitro-1-(2,4,6-trimethylphenyl)sulfonyl-1,2,4-triazole
CAS: 74257-00-4
Molecular Formula: C₁₁H₁₂N₄O₄S
Molecular Weight: 296.3
Molecular structure:
Melting point:  134-139 °C(lit.)
Storage temp.:  −20°C
H bond acceptors: 8 
H bond donors: 0 
Freely Rotating Bonds: 3 
Index of Refraction: 1.668 
Molar Refractivity: 73.06 cm³ 
Molar Volume: 195.9 cm³ 
Polarizability: 28.96 10^-24cm³ 
Surface Tension: 60.7 dyne/cm 
Density: 1.51 g/cm³ 
Flash Point: 276.4 °C 
Enthalpy of Vaporization: 80.94 kJ/mol 
Boiling Point: 533.4 °C at 760 mmHg 
Vapour Pressure: 1.86E-11 mmHg at 25°C

 1-(Mesitylene-2-sulfonyl)-3-nitro-1,2,4-triazole (74257-00-4) is commonly used as an efficient coupling reagent in oligonucleotide synthesis.

Hazard Codes:  Xi
Risk Statements:  36/37/38 (36/37/38:  Irritating to eyes, respiratory system and skin)
Safety Statements:  26 (26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice)
WGK Germany:  3

Removal in wastewater treatment of 1-(Mesitylene-2-sulfonyl)-3-nitro-1,2,4-triazole (74257-00-4) can be stated as follows:
Total removal:2.25  percent
Total biodegradation:0.10  percent
Total sludge adsorption:2.16  percent
Total to Air:0.00  percent
(using 10000 hr Bio P,A,S)