1,5-Dimethyl-1,4-cyclohexadiene C8H12 structure – Flashcards

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

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

 
 Log Octanol-Water Partition Coef (SRC):
 Log Kow (KOWWIN v1.67 estimate) = 3.84

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
 Boiling Pt (deg C): 138.78 (Adapted Stein & Brown method)
 Melting Pt (deg C): -43.84 (Mean or Weighted MP)
 VP(mm Hg,25 deg C): 8.4 (Mean VP of Antoine & Grain methods)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
 Water Solubility at 25 deg C (mg/L): 16.83
 log Kow used: 3.84 (estimated)
 no-melting pt equation used

 Water Sol Estimate from Fragments:
 Wat Sol (v1.01 est) = 331.71 mg/L

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
 Bond Method : 2.54E-001 atm-m3/mole
 Group Method: 2.94E-002 atm-m3/mole
 Henrys LC [VP/WSol estimate using EPI values]: 7.104E-002 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
 Log Kow used: 3.84 (KowWin est)
 Log Kaw used: 1.016 (HenryWin est)
 Log Koa (KOAWIN v1.10 estimate): 2.824
 Log Koa (experimental database): None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
 Biowin1 (Linear Model) : 0.6960
 Biowin2 (Non-Linear Model) : 0.8134
 Expert Survey Biodegradation Results:
 Biowin3 (Ultimate Survey Model): 2.9601 (weeks )
 Biowin4 (Primary Survey Model) : 3.6917 (days-weeks )
 MITI Biodegradation Probability:
 Biowin5 (MITI Linear Model) : 0.4429
 Biowin6 (MITI Non-Linear Model): 0.4929
 Anaerobic Biodegradation Probability:
 Biowin7 (Anaerobic Linear Model): 0.2899
 Ready Biodegradability Prediction: NO

 Hydrocarbon Biodegradation (BioHCwin v1.01):
 LOG BioHC Half-Life (days) : 0.4603
 BioHC Half-Life (days) : 2.8858

 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
 Vapor pressure (liquid/subcooled): 1.03E+003 Pa (7.76 mm Hg)
 Log Koa (Koawin est ): 2.824
 Kp (particle/gas partition coef. (m3/ug)):
 Mackay model : 2.9E-009 
 Octanol/air (Koa) model: 1.64E-010 
 Fraction sorbed to airborne particulates (phi):
 Junge-Pankow model : 1.05E-007 
 Mackay model : 2.32E-007 
 Octanol/air (Koa) model: 1.31E-008 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
 Hydroxyl Radicals Reaction:
 OVERALL OH Rate Constant = 175.9400 E-12 cm3/molecule-sec
 Half-Life = 0.061 Days (12-hr day; 1.5E6 OH/cm3)
 Half-Life = 0.730 Hrs
 Ozone Reaction:
 OVERALL Ozone Rate Constant = 86.000000 E-17 cm3/molecule-sec
 Half-Life = 0.013 Days (at 7E11 mol/cm3)
 Half-Life = 19.189 Min
 Reaction With Nitrate Radicals May Be Important!
 Fraction sorbed to airborne particulates (phi): 1.68E-007 (Junge,Mackay)
 Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
 Koc : 434
 Log Koc: 2.638 

 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 = 2.257 (BCF = 180.7)
 log Kow used: 3.84 (estimated)

 Volatilization from Water:
 Henry LC: 0.0294 atm-m3/mole (estimated by Group SAR Method)
 Half-Life from Model River: 1.082 hours
 Half-Life from Model Lake : 99.02 hours (4.126 days)

 Removal In Wastewater Treatment:
 Total removal: 92.82 percent
 Total biodegradation: 0.07 percent
 Total sludge adsorption: 13.98 percent
 Total to Air: 78.77 percent
 (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
 Mass Amount Half-Life Emissions
 (percent) (hr) (kg/hr)
 Air 0.139 0.262 1000 
 Water 32.4 360 1000 
 Soil 64.5 720 1000 
 Sediment 2.92 3.24e+003 0 
 Persistence Time: 190 hr