ChemSpider 2D Image | Quinoxaline | C8H6N2

Quinoxaline

  • Molecular FormulaC8H6N2
  • Average mass130.147 Da
  • Monoisotopic mass130.053101 Da
  • ChemSpider ID21106470

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91-19-0 [RN]
Chinoxalin [German] [ACD/IUPAC Name]
Quinoxaline [ACD/Index Name] [ACD/IUPAC Name] [Wiki]
Quinoxaline [French] [ACD/Index Name] [ACD/IUPAC Name]
1,4-Benzodiazine
1,4-diazanaphthalene
1,4-naphthyridine
202-047-4 [EINECS]
benzo[a]pyrazine
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Validated by Experts, Validated by Users, Non-Validated, Removed by Users

22710_FLUKA [DBID]
Q1603_ALDRICH [DBID]
USAF EK-7094 [DBID]
  • Experimental Physico-chemical Properties
  • Predicted Physico-chemical Properties
  • Miscellaneous
  • Gas Chromatography
    • Retention Index (Kovats):

      1219 (estimated with error: 83) NIST Spectra mainlib_227885, replib_135628
    • Retention Index (Lee):

      220.37 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.3 mm; Column length: 12 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 50 C; End T: 250 C; CAS no: 91190; Active phase: SE-52; Carrier gas: He; Phase thickness: 0.34 um; Data type: Lee RI; Authors: Lee, M.L.; Vassilaros, D.L.; White, C.M.; Novotny, M., Retention Indices for Programmed-Temperature Capillary-Column Gas Chromatography of Polycyclic Aromatic Hydrocarbons, Anal. Chem., 51(6), 1979, 768-773.) NIST Spectra nist ri
    • Retention Index (Normal Alkane):

      1169 (Program type: Ramp; Column cl... (show more) ass: Standard non-polar; Column diameter: 0.32 mm; Column length: 25 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 80 C; End T: 260 C; CAS no: 91190; Active phase: Ultra-1; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Okumura, T., retention indices of environmental chemicals on methyl silicone capillary column, Journal of Environmental Chemistry (Japan), 1(2), 1991, 333-358.) NIST Spectra nist ri
      1229 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50 C(1min)=> 20C/min => 80C => 25C/min => 250C (3 min); CAS no: 91190; Active phase: HP-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Hartmann, P.J., The effect of wine matrix ingredients on 3-alkyl-2-methoxypyrazines measurements by headspace solid-phase microextraction (HS-SPME), Master's Thesis, Virginia Tech., Blacksburg, Va., 2003, 30.) NIST Spectra nist ri
      1899.6 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.75 mm; Column length: 30 m; Column type: Capillary; Heat rate: 5 K/min; Start T: 70 C; End T: 180 C; Start time: 4 min; CAS no: 91190; Active phase: Carbowax 20M; Carrier gas: He; Phase thickness: 1 um; Data type: Normal alkane RI; Authors: Arnoldi, A.; Arnoldi, C.; Baldi, O.; Griffini, A., Flavor components in the Maillard reaction of different amino acids with fructose in cocoa butter-water. Qualitative and quantitative analysis of pyrazines, J. Agric. Food Chem., 36(5), 1988, 988-992.) NIST Spectra nist ri
      1879 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 70 C; End T: 160 C; Start time: 8 min; CAS no: 91190; Active phase: DB-Wax; Carrier gas: He; Data type: Normal alkane RI; Authors: Wong, J.M.; Bernhard, R.A., Effect of nitrogen source on pyrazine formation, J. Agric. Food Chem., 36(1), 1988, 123-129.) NIST Spectra nist ri
      1920.8 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.03 in; Column length: 1000 ft; Column type: Capillary; Heat rate: 4 K/min; Start T: 80 C; End T: 225 C; Start time: 5 min; CAS no: 91190; Active phase: Carbowax 20M; Data type: Normal alkane RI; Authors: Mussinan, C.J.; Walradt, J.P., Volatile constituents of pressure cooked pork liver, J. Agric. Food Chem., 22(5), 1974, 827-831.) NIST Spectra nist ri
      1901 (Program type: Ramp; Column cl... (show more) ass: Standard polar; Column diameter: 0.03 in; Column length: 500 ft; Column type: Capillary; Heat rate: 2 K/min; Start T: 60 C; End T: 190 C; Start time: 2 min; CAS no: 91190; Active phase: Carbowax 20M; Carrier gas: He; Data type: Normal alkane RI; Authors: Kinlin, T.E.; Muralidhara, R.; Pittet, A.O.; Sanderson, A.; Walradt, J.P., Volatile components of roasted filberts, J. Agric. Food Chem., 20(5), 1972, 1021-1028.) NIST Spectra nist ri
    • Retention Index (Linear):

      1905 (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: 40 C; End T: 250 C; End time: 15 min; Start time: 5 min; CAS no: 91190; Active phase: DB-Wax; Carrier gas: He; Phase thickness: 0.5 um; Data type: Linear RI; Authors: Pozo-Bayon M.A.; Ruiz-Rodriguez A.; Pernin K.; Cayot N., Influence of eggs on the aroma composition of a sponge cake and on the aroma release in model studies on flavored sponge cakes, J. Agric. Food Chem., 55, 2007, 1418-1426.) NIST Spectra nist ri
      1886 (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: 91190; 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: 1.2±0.1 g/cm3
Boiling Point: 229.5±0.0 °C at 760 mmHg
Vapour Pressure: 0.1±0.4 mmHg at 25°C
Enthalpy of Vaporization: 44.7±3.0 kJ/mol
Flash Point: 98.3±0.0 °C
Index of Refraction: 1.653
Molar Refractivity: 40.3±0.3 cm3
#H bond acceptors: 2
#H bond donors: 0
#Freely Rotating Bonds: 0
#Rule of 5 Violations: 0
ACD/LogP: 1.30
ACD/LogD (pH 5.5): 1.45
ACD/BCF (pH 5.5): 7.39
ACD/KOC (pH 5.5): 145.73
ACD/LogD (pH 7.4): 1.45
ACD/BCF (pH 7.4): 7.39
ACD/KOC (pH 7.4): 145.73
Polar Surface Area: 26 Å2
Polarizability: 16.0±0.5 10-24cm3
Surface Tension: 54.9±3.0 dyne/cm
Molar Volume: 110.0±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) =  1.12
    Log Kow (Exper. database match) =  1.32
       Exper. Ref:  Hansch,C et al. (1995)

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  248.51  (Adapted Stein & Brown method)
    Melting Pt (deg C):  57.28  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.0711  (Modified Grain method)
    MP  (exp database):  28 deg C
    BP  (exp database):  229.5 deg C
    Subcooled liquid VP: 0.0756 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):  6850
       log Kow used: 1.32 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  6.6e+005 mg/L (25 deg C)
        Exper. Ref:  PEARLMAN,RS ET AL (1984)

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  15635 mg/L
    Wat Sol (Exper. database match) =  660000.00
       Exper. Ref:  PEARLMAN,RS ET AL (1984)

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   2.85E-007  atm-m3/mole
   Group Method:   6.43E-009  atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]:  1.777E-006 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  1.32  (exp database)
  Log Kaw used:  -4.934  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.254
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6856
   Biowin2 (Non-Linear Model)     :   0.7614
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.9116  (weeks       )
   Biowin4 (Primary Survey Model) :   3.6600  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.3743
   Biowin6 (MITI Non-Linear Model):   0.3750
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.2635
 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):  10.1 Pa (0.0756 mm Hg)
  Log Koa (Koawin est  ): 6.254
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  2.98E-007 
       Octanol/air (Koa) model:  4.41E-007 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  1.07E-005 
       Mackay model           :  2.38E-005 
       Octanol/air (Koa) model:  3.52E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =   2.0000 E-12 cm3/molecule-sec
      Half-Life =     5.348 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =    64.176 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 1.73E-005 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  199.2
      Log Koc:  2.299 

 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 = 0.316 (BCF = 2.072)
       log Kow used: 1.32 (expkow database)

 Volatilization from Water:
    Henry LC:  2.85E-007 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River:       2345  hours   (97.7 days)
    Half-Life from Model Lake : 2.568E+004  hours   (1070 days)

 Removal In Wastewater Treatment:
    Total removal:               1.95  percent
    Total biodegradation:        0.09  percent
    Total sludge adsorption:     1.84  percent
    Total to Air:                0.02  percent
      (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
           Mass Amount    Half-Life    Emissions
            (percent)        (hr)       (kg/hr)
   Air       2.99            128          1000       
   Water     35.5            360          1000       
   Soil      61.4            720          1000       
   Sediment  0.0779          3.24e+003    0          
     Persistence Time: 478 hr




                    

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