ChemSpider 2D Image | 956766 | C8H12N2

956766

  • Molecular FormulaC8H12N2
  • Average mass136.194 Da
  • Monoisotopic mass136.100052 Da
  • ChemSpider ID25554

More details:






Validated by Experts, Validated by Users, Non-Validated, Removed by Users

15707-34-3 [RN]
5-Ethyl-2,3-dimethylpyrazin [German] [ACD/IUPAC Name]
5-Ethyl-2,3-dimethylpyrazine [ACD/IUPAC Name]
5-Éthyl-2,3-diméthylpyrazine [French] [ACD/IUPAC Name]
956766
MFCD04038059 [MDL number]
Pyrazine, 5-ethyl-2,3-dimethyl- [ACD/Index Name]
[15707-34-3]
'15707-34-3
2,3-Dimethyl-5-Ethyl Pyrazine
More...

Validated by Experts, Validated by Users, Non-Validated, Removed by Users

6496XCH56Q [DBID]
CCRIS 4693 [DBID]
UNII:6496XCH56Q [DBID]
UNII-6496XCH56Q [DBID]
  • Experimental Physico-chemical Properties
  • Miscellaneous
    • Appearance:

      Not Available Novochemy [NC-33577]
    • Safety:

      20/21/22 Novochemy [NC-33577]
      20/21/36/37/39 Novochemy [NC-33577]
      GHS07; GHS09 Novochemy [NC-33577]
      H304; H332 Novochemy [NC-33577]
      P102; P210; P262; P270; P302+P352; P308+P313 Novochemy [NC-33577]
      P261; P262 Biosynth Q-100190
      R22 Novochemy [NC-33577]
      Warning Novochemy [NC-33577]
  • Gas Chromatography
    • Retention Index (Kovats):

      1107 (estimated with error: 83) NIST Spectra mainlib_109558
    • Retention Index (Normal Alkane):

      1066 (Program type: Ramp; Column cl... (show more) ass: Standard non-polar; Column diameter: 0.22 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 80 C; End T: 200 C; CAS no: 15707343; Active phase: OV-101; Carrier gas: N2; Data type: Normal alkane RI; Authors: Mihara, S.; Masuda, H., Correlation between molecular structures and retention indices of pyrazines, J. Chromatogr., 402, 1987, 309-317.) NIST Spectra nist ri
      1065 (Program type: Ramp; Column cl... (show more) ass: Standard non-polar; Column length: 8 ft; Column type: Packed; Heat rate: 2.1 K/min; Start T: 75 C; End T: 220 C; CAS no: 15707343; Active phase: SE-30; Carrier gas: He; Substrate: Chromosorb W (60-80 mesh); Data type: Normal alkane RI; Authors: Friedel, P.; Krampl, V.; Radford, T.; Renner, J.A.; Shephard, F.W.; Gianturco, M.A., Some constituents of the aroma complex of coffee, J. Agric. Food Chem., 19(3), 1971, 530-532.) NIST Spectra nist ri
      1076 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50C(2min) =>2C/min =>140C =>10C/min =>280C (10min); CAS no: 15707343; Active phase: HP-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Characterization of Pyrazines in Some Chinese Liquors; Their Approximate Concentrations, W. Fan; Y. Xu; Y. Zhang, J. Agric. Food Chem., 55, 2007, 9956-9962.) NIST Spectra nist ri
      1089 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50C(2min) =>20C/min =>80C (1min) =>20C/min =>100C(1min) =>30C/min =>230C(3min); CAS no: 15707343; Active phase: HP-5MS; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Ho, C.W.; Wan Aida, W.M.; Maskat, M.Y.; Osman, H., Changes in volatile compounds of palm sap (Arenga pinnata) during the heating process for production of palm sugar, Food Chem., 102, 2007, 1156-1162.) NIST Spectra nist ri
      1088 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 40 C; End T: 270 C; End time: 5 min; Start time: 4 min; CAS no: 15707343; Active phase: MDN-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: van Loon, W.A.M.; Linssen, J.P.H.; Legger, A.; Posthumus, M.A.; Voragen, A.G.J., Identification and olfactometry of French fries flavour extracted at mouth conditions, Food Chem., 90, 2005, 417-425.) NIST Spectra nist ri
      1090 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 40 C; End T: 270 C; End time: 5 min; Start time: 4 min; CAS no: 15707343; Active phase: MDN-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: van Loon, W.A.M.; Linssen, J.P.H.; Legger, A.; Posthumus, M.A.; Voragen, A.G.J., Identification and olfactometry of French fries flavour extracted at mouth conditions, Food Chem., 90, 2005, 417-425., Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 35 C; End T: 250 C; End time: 45 min; Start time: 15 min; CAS no: 15707343; Active phase: HP-5; Phase thickness: 0.52 um; Data type: Normal alkane RI; Authors: Boylston, T.D.; Viniyard, B.T., Isolation of volatile flavor compounds from peanut butter using purge-and-trap technique, in Instrumental Methods in Food and Beverage Analysis, D. Wetzel and G. Charalambous, ed(s), 1998, 225-243.) NIST Spectra nist ri
      1084 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column length: 3 m; Column type: Packed; Heat rate: 6 K/min; Start T: 50 C; End T: 230 C; End time: 10 min; Start time: 2 min; CAS no: 15707343; Active phase: SE-54; Substrate: Chromosorb G AW DMCS (100-120 mesh); Data type: Normal alkane RI; Authors: Schieberle, P., Primary odorants in popcorn, J. Agric. Food Chem., 39(6), 1991, 1141-1144.) NIST Spectra nist ri
      1445 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 50 C; End T: 230 C; End time: 15 min; CAS no: 15707343; Active phase: DB-Wax; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Characterization of Pyrazines in Some Chinese Liquors; Their Approximate Concentrations, W. Fan; Y. Xu; Y. Zhang, J. Agric. Food Chem., 55, 2007, 9956-9962., Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.32 mm; Column length: 30 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 40 C; End T: 230 C; End time: 15 min; Start time: 2 min; CAS no: 15707343; Active phase: DB-Wax; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Fan, W.; Qian, M.C., Characterization of Aroma Compounds of Chinese "Wuliangye" and "Jiannanchun" Liquors by Aroma Extract Dilution Analysis, J. Agric. Food Chem., 54, 2006, 2695-2704.) NIST Spectra nist ri
      1470 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.32 mm; Column length: 25 m; Column type: Capillary; Heat rate: 5 K/min; Start T: 60 C; End T: 240 C; End time: 5 min; Start time: 1 min; CAS no: 15707343; Active phase: HP-FFAP; Phase thickness: 0.52 um; Data type: Normal alkane RI; Authors: Qian, M.; Reineccius, G., Identification of aroma compounds in Parmigiano-Reggiano cheese by gas chromatography/olfactometry, J. Dairy Sci., 85(6), 2002, 1362-1369.) NIST Spectra nist ri
      1493 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 40 C; End T: 190 C; Start time: 6 min; CAS no: 15707343; Active phase: HP-Wax; Carrier gas: He; Phase thickness: 0.5 um; Data type: Normal alkane RI; Authors: Sanz, C.; Ansorena, D.; Bello, J.; Cid, C., Optimizing headspace temperature and time sampling for identification of volatile compounds in ground roasted Arabica coffee, J. Agric. Food Chem., 49, 2001, 1364-1369.) NIST Spectra nist ri
      1421 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column type: Capillary; CAS no: 15707343; Active phase: Carbowax 20M; Data type: Normal alkane RI; Authors: Mihara, S.; Masuda, H., Correlation between molecular structures and retention indices of pyrazines, J. Chromatogr., 402, 1987, 309-317.) NIST Spectra nist ri
      1466.3 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.03 in; Column length: 1000 ft; Column type: Capillary; Heat rate: 2 K/min; Start T: 100 C; End T: 225 C; CAS no: 15707343; Active phase: Carbowax 20M; Carrier gas: He; Data type: Normal alkane RI; Authors: Mussinan, C.J.; Wilson, R.A.; Katz, I., Isolation and identification of pyrazines present in pressure-cooked beef, J. Agric. Food Chem., 21(5), 1973, 871-872.) NIST Spectra nist ri
      1469.4 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column length: 13 ft; Column type: Packed; Heat rate: 2.1 K/min; Start T: 75 C; End T: 220 C; CAS no: 15707343; Active phase: Carbowax 20M; Carrier gas: He; Substrate: Diatoport S; Data type: Normal alkane RI; Authors: Friedel, P.; Krampl, V.; Radford, T.; Renner, J.A.; Shephard, F.W.; Gianturco, M.A., Some constituents of the aroma complex of coffee, J. Agric. Food Chem., 19(3), 1971, 530-532.) NIST Spectra nist ri
    • Retention Index (Linear):

      1065 (Program type: Ramp; Column cl... (show more) ass: Standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 40 C; End T: 260 C; End time: 40 min; CAS no: 15707343; Active phase: DB-1; Carrier gas: He; Phase thickness: 1.05 um; Data type: Linear RI; Authors: Izzo, H.V.; Ho, C.-T., Isolation and identification of the volatile components of an extruded autolyzed yeast extract, J. Agric. Food Chem., 39, 1991, 2245-2248.) NIST Spectra nist ri
      1068 (Program type: Ramp; Column cl... (show more) ass: Standard non-polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 40 C; End T: 220 C; End time: 10 min; CAS no: 15707343; Active phase: DB-1; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Zhang, Y.; Ho, C.-T., Comparison of the volatile compounds formed from the thermal reaction of glucose with cysteine and glutathione, J. Agric. Food Chem., 39, 1991, 760-763.) NIST Spectra nist ri
      1069 (Program type: Complex; Column... (show more) class: Standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Description: -40C => 40C/min => 40C => 2C/min => 260C; CAS no: 15707343; Active phase: DB-1; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Kuo, M.-C.; Zhang, Y.; Hartman, T.G.; Rosen, R.T.; Ho, C.-T., Selective purge-and-trap method for the analysis of volatile pyrazines, J. Agric. Food Chem., 37, 1989, 1020-1022.) NIST Spectra nist ri
      1097 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Description: OC=>60C/min=>60C(5min) =>4C/min =>250C(20min); CAS no: 15707343; Active phase: BPX-5; Carrier gas: He; Phase thickness: 0.5 um; Data type: Linear RI; Authors: Owens J.D.; Allagheny N.; Kipping G.; Ames J.M., Formation of volatile compounds during Bacillus subtilis fermentation of soya beans, J. Sci. Food Agric., 74(1), 1997, 132-140., Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 60 C; End T: 250 C; End time: 10 min; Start time: 5 min; CAS no: 15707343; Active phase: BPX-5; Carrier gas: He; Phase thickness: 0.5 um; Data type: Linear RI; Authors: Ames, J.M.; Guy, R.C.E.; Kipping, G.J., Effect of pH and temperature on the formation of volatile compounds in cysteine/reducing sugar/starch mixtures during extrusion cooking, J. Agric. Food Chem., 49, 2001, 1885-1894.) NIST Spectra nist ri
      1096 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 60 C; End T: 250 C; End time: 10 min; Start time: 5 min; CAS no: 15707343; Active phase: BPX-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Ames, J.M.; Guy, R.C.E.; Kipping, G.J., Effect of pH, temperature, and moisture on the formation of volatile compounds in glycine/glucose model systems, J. Agric. Food Chem., 49, 2001, 4315-4323.) NIST Spectra nist ri
      1105 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Description: oC(5min) =>60C/min => 60C (5min) =>4C/min =>250C; CAS no: 15707343; Active phase: DB-5; Carrier gas: He; Phase thickness: 0.5 um; Data type: Linear RI; Authors: Parker, J.K.; Hassell, G.M.E.; Mottram, D.S.; Guy, R.C.E., Sensory and instrumental analyses of volatiles generated during the extrusion cooking of oat flours, J. Agric. Food Chem., 48, 2000, 3497-3506.) NIST Spectra nist ri
      1094 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.325 mm; Column length: 50 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 50 C; End T: 250 C; End time: 10 min; Start time: 2 min; CAS no: 15707343; Active phase: BPX-5; Carrier gas: He; Phase thickness: 0.5 um; Data type: Linear RI; Authors: Ames, J.M.; Defaye, A.B.; Bates, L., The effect of pH on the volatiles formed in an extruded starch-glucose-lysine model system, Food Chem., 58(4), 1997, 323-327.) NIST Spectra nist ri
      1460 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.25 mm; Column length: 60 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 50 C; End T: 230 C; End time: 60 min; CAS no: 15707343; Active phase: DB-Wax; Carrier gas: He; Phase thickness: 0.25 um; Data type: Linear RI; Authors: Shimoda, M.; Shiratsuchi, H.; Nakada, Y.; Wu, Y.; Osajima, Y., Identification and sensory characterization of volatile flavor compounds in sesame seed oil, J. Agric. Food Chem., 44, 1996, 3909-3912.) NIST Spectra nist ri

Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module

Density: 1.0±0.1 g/cm3
Boiling Point: 190.7±35.0 °C at 760 mmHg
Vapour Pressure: 0.7±0.4 mmHg at 25°C
Enthalpy of Vaporization: 40.9±3.0 kJ/mol
Flash Point: 70.8±17.6 °C
Index of Refraction: 1.501
Molar Refractivity: 41.6±0.3 cm3
#H bond acceptors: 2
#H bond donors: 0
#Freely Rotating Bonds: 1
#Rule of 5 Violations: 0
ACD/LogP: 1.63
ACD/LogD (pH 5.5): 1.49
ACD/BCF (pH 5.5): 8.04
ACD/KOC (pH 5.5): 154.70
ACD/LogD (pH 7.4): 1.50
ACD/BCF (pH 7.4): 8.06
ACD/KOC (pH 7.4): 154.96
Polar Surface Area: 26 Å2
Polarizability: 16.5±0.5 10-24cm3
Surface Tension: 36.6±3.0 dyne/cm
Molar Volume: 141.2±3.0 cm3

Predicted data is generated using the US Environmental Protection Agency’s EPISuite™

                        
 Log Octanol-Water Partition Coef (SRC):
    Log Kow (KOWWIN v1.67 estimate) =  2.07

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  209.40  (Adapted Stein & Brown method)
    Melting Pt (deg C):  31.78  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.18  (Modified Grain method)
    Subcooled liquid VP: 0.207 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  1473
       log Kow used: 2.07 (estimated)
       no-melting pt equation used

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  7118.2 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Neutral Organics

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   5.21E-006  atm-m3/mole
   Group Method:   2.74E-008  atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]:  2.190E-005 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  2.07  (KowWin est)
  Log Kaw used:  -3.672  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  5.742
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.8467
   Biowin2 (Non-Linear Model)     :   0.9430
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.6736  (weeks-months)
   Biowin4 (Primary Survey Model) :   3.4456  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.3428
   Biowin6 (MITI Non-Linear Model):   0.3150
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model): -0.2042
 Ready Biodegradability Prediction:   NO

Hydrocarbon Biodegradation (BioHCwin v1.01):
    Structure incompatible with current estimation method!

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
  Vapor pressure (liquid/subcooled):  27.6 Pa (0.207 mm Hg)
  Log Koa (Koawin est  ): 5.742
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  1.09E-007 
       Octanol/air (Koa) model:  1.36E-007 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  3.93E-006 
       Mackay model           :  8.7E-006 
       Octanol/air (Koa) model:  1.08E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   3.2023 E-12 cm3/molecule-sec
      Half-Life =     3.340 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =    40.082 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 6.31E-006 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  150.3
      Log Koc:  2.177 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
    Rate constants can NOT be estimated for this structure!

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
   Log BCF from regression-based method = 0.896 (BCF = 7.877)
       log Kow used: 2.07 (estimated)

 Volatilization from Water:
    Henry LC:  5.21E-006 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River:      132.3  hours   (5.514 days)
    Half-Life from Model Lake :       1542  hours   (64.23 days)

 Removal In Wastewater Treatment:
    Total removal:               2.60  percent
    Total biodegradation:        0.10  percent
    Total sludge adsorption:     2.21  percent
    Total to Air:                0.29  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       2.29            80.2         1000       
   Water     29.2            900          1000       
   Soil      68.4            1.8e+003     1000       
   Sediment  0.123           8.1e+003     0          
     Persistence Time: 828 hr




                    

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