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CAS Number: 1185-55-3

SMILES : CO[Si](C)(OC)OC

CHEM : Methyltrimethoxysilane

MOL FOR: C4 H12 O3 Si1

MOL WT : 136.22

------------------------------ EPI SUMMARY (v4.11) --------------------------

Physical Property Inputs:

Log Kow (octanol-water): ------

Boiling Point (deg C) : ------

Melting Point (deg C) : ------

Vapor Pressure (mm Hg) : ------

Water Solubility (mg/L): ------

Henry LC (atm-m3/mole) : ------

Log Octanol-Water Partition Coef (SRC):

Log Kow (KOWWIN v1.68 estimate) = -0.67

Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):

Boiling Pt (deg C): 98.41 (Adapted Stein & Brown method)

Melting Pt (deg C): -59.98 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 33.6 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 4.48E+003 (Mean VP of Antoine & Grain methods)

BP (exp database): 102.5 deg C

Water Solubility Estimate from Log Kow (WSKOW v1.42):

Water Solubility at 25 deg C (mg/L): 3.252e+005

log Kow used: -0.67 (estimated)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 1e+006 mg/L

ECOSAR Class Program (ECOSAR v1.11):

Class(es) found:

Alkoxy Silanes

Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:

Bond Method : 8.67E-005 atm-m3/mole (8.79E+000 Pa-m3/mole)

Group Method: Incomplete

For Henry LC Comparison Purposes:

User-Entered Henry LC: not entered

Henrys LC [via VP/WSol estimate using User-Entered or Estimated values]:

HLC: 1.852E-005 atm-m3/mole (1.876E+000 Pa-m3/mole)

VP: 33.6 mm Hg (source: MPBPVP)

WS: 3.25E+005 mg/L (source: WSKOWWIN)

Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:

Log Kow used: -0.67 (KowWin est)

Log Kaw used: -2.450 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 1.780

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.6827

Biowin2 (Non-Linear Model) : 0.7454

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 2.8981 (weeks )

Biowin4 (Primary Survey Model) : 3.6512 (days-weeks )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.3085

Biowin6 (MITI Non-Linear Model): 0.2093

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.5178

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): 4.25E+003 Pa (31.9 mm Hg)

Log Koa (Koawin est ): 1.780

Kp (particle/gas partition coef. (m3/ug)):

Mackay model : 7.05E-010

Octanol/air (Koa) model: 1.48E-011

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 2.55E-008

Mackay model : 5.64E-008

Octanol/air (Koa) model: 1.18E-009

Atmospheric Oxidation (25 deg C) [AopWin v1.92]:

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 2.6384 E-12 cm3/molecule-sec

Half-Life = 4.054 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 48.648 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

4.1E-008 (Junge-Pankow, Mackay avg)

1.18E-009 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 330.5 L/kg (MCI method)

Log Koc: 2.519 (MCI method)

Koc : 0.2619 L/kg (Kow method)

Log Koc: -0.582 (Kow method)

Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v2.00]:

Rate constants can NOT be estimated for this structure!

Bioaccumulation Estimates (BCFBAF v3.01):

Log BCF from regression-based method = 0.500 (BCF = 3.162 L/kg wet-wt)

Log Biotransformation Half-life (HL) = -1.1124 days (HL = 0.0772 days)

Log BCF Arnot-Gobas method (upper trophic) = -0.041 (BCF = 0.9102)

Log BAF Arnot-Gobas method (upper trophic) = -0.041 (BAF = 0.9102)

log Kow used: -0.67 (estimated)

Volatilization from Water:

Henry LC: 8.67E-005 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River: 9.073 hours

Half-Life from Model Lake : 196.8 hours (8.202 days)

Removal In Wastewater Treatment:

Total removal: 6.09 percent

Total biodegradation: 0.09 percent

Total sludge adsorption: 1.69 percent

Total to Air: 4.31 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 5.31 97.3 1000

Water 22.1 360 1000

Soil 72.3 720 1000

Sediment 0.311 3.24e+003 0

Persistence Time: 444 hr

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