1,1,1,3,5,5,5-Heptamethyl-3-[2-(trimethylsilyl)ethyl]trisiloxane C12H34O2Si4 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) = 7.72

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
 Boiling Pt (deg C): 204.08 (Adapted Stein & Brown method)
 Melting Pt (deg C): -30.46 (Mean or Weighted MP)
 VP(mm Hg,25 deg C): 0.294 (Mean VP of Antoine & Grain methods)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
 Water Solubility at 25 deg C (mg/L): 0.0001529
 log Kow used: 7.72 (estimated)
 no-melting pt equation used

 Water Sol Estimate from Fragments:
 Wat Sol (v1.01 est) = 6.8601e-006 mg/L

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

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
 Bond Method : 1.66E+000 atm-m3/mole
 Group Method: Incomplete
 Henrys LC [VP/WSol estimate using EPI values]: 8.166E+002 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
 Log Kow used: 7.72 (KowWin est)
 Log Kaw used: 1.832 (HenryWin est)
 Log Koa (KOAWIN v1.10 estimate): 5.888
 Log Koa (experimental database): None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
 Biowin1 (Linear Model) : 0.5939
 Biowin2 (Non-Linear Model) : 0.1716
 Expert Survey Biodegradation Results:
 Biowin3 (Ultimate Survey Model): 2.4859 (weeks-months)
 Biowin4 (Primary Survey Model) : 3.3821 (days-weeks )
 MITI Biodegradation Probability:
 Biowin5 (MITI Linear Model) : -0.1451
 Biowin6 (MITI Non-Linear Model): 0.0032
 Anaerobic Biodegradation Probability:
 Biowin7 (Anaerobic Linear Model): 0.0923
 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): 36 Pa (0.27 mm Hg)
 Log Koa (Koawin est ): 5.888
 Kp (particle/gas partition coef. (m3/ug)):
 Mackay model : 8.33E-008 
 Octanol/air (Koa) model: 1.9E-007 
 Fraction sorbed to airborne particulates (phi):
 Junge-Pankow model : 3.01E-006 
 Mackay model : 6.67E-006 
 Octanol/air (Koa) model: 1.52E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
 Hydroxyl Radicals Reaction:
 OVERALL OH Rate Constant = 4.0234 E-12 cm3/molecule-sec
 Half-Life = 2.658 Days (12-hr day; 1.5E6 OH/cm3)
 Half-Life = 31.901 Hrs
 Ozone Reaction:
 No Ozone Reaction Estimation
 Fraction sorbed to airborne particulates (phi): 4.84E-006 (Junge,Mackay)
 Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
 Koc : 4.741E+004
 Log Koc: 4.676 

 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 = 3.817 (BCF = 6566)
 log Kow used: 7.72 (estimated)

 Volatilization from Water:
 Henry LC: 1.66 atm-m3/mole (estimated by Bond SAR Method)
 Half-Life from Model River: 1.834 hours
 Half-Life from Model Lake : 170.6 hours (7.11 days)

 Removal In Wastewater Treatment (recommended maximum 95%):
 Total removal: 96.22 percent
 Total biodegradation: 0.56 percent
 Total sludge adsorption: 80.89 percent
 Total to Air: 14.78 percent
 (using 10000 hr Bio P,A,S)

 Level III Fugacity Model:
 Mass Amount Half-Life Emissions
 (percent) (hr) (kg/hr)
 Air 0.549 63.8 1000 
 Water 1.95 900 1000 
 Soil 27.6 1.8e+003 1000 
 Sediment 69.9 8.1e+003 0 
 Persistence Time: 3.04e+003 hr