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CAS Number: 505-73-7
SMILES : O=C(O)CSSCC(=O)O
CHEM : Acetic acid, 2,2'-dithiobis-
MOL FOR: C4 H6 O4 S2
MOL WT : 182.21
------------------------------ EPI SUMMARY (v4.10) --------------------------
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) = -0.20
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 356.94 (Adapted Stein & Brown method)
Melting Pt (deg C): 126.14 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 8.84E-006 (Modified Grain method)
VP (Pa, 25 deg C) : 0.00118 (Modified Grain method)
Subcooled liquid VP: 9.03E-005 mm Hg (25 deg C, Mod-Grain method)
: 0.012 Pa (25 deg C, Mod-Grain method)
Water Solubility Estimate from Log Kow (WSKOW v1.42):
Water Solubility at 25 deg C (mg/L): 1.994e+005
log Kow used: -0.20 (estimated)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 47082 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Neutral Organics-acid
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 6.71E-014 atm-m3/mole (6.80E-009 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: 1.063E-011 atm-m3/mole (1.077E-006 Pa-m3/mole)
VP: 8.84E-006 mm Hg (source: MPBPVP)
WS: 1.99E+005 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: -0.20 (KowWin est)
Log Kaw used: -11.562 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 11.362
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.8062
Biowin2 (Non-Linear Model) : 0.8465
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 3.5257 (days-weeks )
Biowin4 (Primary Survey Model) : 4.3560 (hours-days )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.6312
Biowin6 (MITI Non-Linear Model): 0.5972
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 1.2616
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): 0.012 Pa (9.03E-005 mm Hg)
Log Koa (Koawin est ): 11.362
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 0.000249
Octanol/air (Koa) model: 0.0565
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 0.00892
Mackay model : 0.0195
Octanol/air (Koa) model: 0.819
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 236.9678 E-12 cm3/molecule-sec
Half-Life = 0.045 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 0.542 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
0.0142 (Junge-Pankow, Mackay avg)
0.819 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 24.34 L/kg (MCI method)
Log Koc: 1.386 (MCI method)
Koc : 1.109 L/kg (Kow method)
Log Koc: 0.045 (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) = -1.2582 days (HL = 0.05518 days)
Log BCF Arnot-Gobas method (upper trophic) = -0.027 (BCF = 0.9389)
Log BAF Arnot-Gobas method (upper trophic) = -0.027 (BAF = 0.9389)
log Kow used: -0.20 (estimated)
Volatilization from Water:
Henry LC: 6.71E-014 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 1.178E+010 hours (4.908E+008 days)
Half-Life from Model Lake : 1.285E+011 hours (5.354E+009 days)
Removal In Wastewater Treatment:
Total removal: 1.85 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.76 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 2.14e-006 1.08 1000
Water 24.6 208 1000
Soil 75.4 416 1000
Sediment 0.0644 1.87e+003 0
Persistence Time: 431 hr