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CAS Number: 13205-48-6
SMILES : OC(=O)c1ccc(SC)cc1
CHEM : p-Methiobenzoic acid
MOL FOR: C8 H8 O2 S1
MOL WT : 168.21
------------------------------ 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) = 2.48
Log Kow (Exper. database match) = 2.74
Exper. Ref: HANSCH,C ET AL. (1995)
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 310.48 (Adapted Stein & Brown method)
Melting Pt (deg C): 91.99 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 1.92E-005 (Modified Grain method)
VP (Pa, 25 deg C) : 0.00256 (Modified Grain method)
MP (exp database): 193-196 deg C
Subcooled liquid VP: 0.00112 mm Hg (25 deg C, Mod-Grain method)
: 0.149 Pa (25 deg C, Mod-Grain method)
Water Solubility Estimate from Log Kow (WSKOW v1.42):
Water Solubility at 25 deg C (mg/L): 286.6
log Kow used: 2.74 (expkow database)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 230.84 mg/L
ECOSAR Class Program (ECOSAR v1.11):
Class(es) found:
Neutral Organics-acid
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 3.16E-009 atm-m3/mole (3.20E-004 Pa-m3/mole)
Group Method: 2.18E-009 atm-m3/mole (2.21E-004 Pa-m3/mole)
For Henry LC Comparison Purposes:
User-Entered Henry LC: not entered
Henrys LC [via VP/WSol estimate using User-Entered or Estimated values]:
HLC: 1.483E-008 atm-m3/mole (1.502E-003 Pa-m3/mole)
VP: 1.92E-005 mm Hg (source: MPBPVP)
WS: 287 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 2.74 (exp database)
Log Kaw used: -6.889 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 9.629
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.8443
Biowin2 (Non-Linear Model) : 0.9545
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.9153 (weeks )
Biowin4 (Primary Survey Model) : 3.6128 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.6220
Biowin6 (MITI Non-Linear Model): 0.6490
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.6404
Ready Biodegradability Prediction: YES
Hydrocarbon Biodegradation (BioHCwin v1.01):
Structure incompatible with current estimation method!
Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
Vapor pressure (liquid/subcooled): 0.149 Pa (0.00112 mm Hg)
Log Koa (Koawin est ): 9.629
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 2.01E-005
Octanol/air (Koa) model: 0.00104
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 0.000725
Mackay model : 0.0016
Octanol/air (Koa) model: 0.0771
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 6.2354 E-12 cm3/molecule-sec
Half-Life = 1.715 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 20.584 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
0.00116 (Junge-Pankow, Mackay avg)
0.0771 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 50.66 L/kg (MCI method)
Log Koc: 1.705 (MCI method)
Koc : 46.91 L/kg (Kow method)
Log Koc: 1.671 (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) = -0.2434 days (HL = 0.5709 days)
Log BCF Arnot-Gobas method (upper trophic) = 1.668 (BCF = 46.59)
Log BAF Arnot-Gobas method (upper trophic) = 1.668 (BAF = 46.59)
log Kow used: 2.74 (expkow database)
Volatilization from Water:
Henry LC: 2.18E-009 atm-m3/mole (estimated by Group SAR Method)
Half-Life from Model River: 3.483E+005 hours (1.451E+004 days)
Half-Life from Model Lake : 3.8E+006 hours (1.583E+005 days)
Removal In Wastewater Treatment:
Total removal: 4.00 percent
Total biodegradation: 0.11 percent
Total sludge adsorption: 3.89 percent
Total to Air: 0.00 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 0.0411 41.2 1000
Water 21.9 360 1000
Soil 77.9 720 1000
Sediment 0.086 3.24e+003 0
Persistence Time: 713 hr