This page contains the EPI System Summary only.
For complete control of this information -
Download the free EPI SuiteTM v4.0 program : here
also you can go back to the Datasheet
CAS Number: 50363-43-4
SMILES : S1CC(SC1)C
CHEM : 4-methyl-1,3-dithiolane
MOL FOR: C4 H8 S2
MOL WT : 120.23
------------------------------ EPI SUMMARY (v4.00) --------------------------
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 v1.67 estimate) = 2.10
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 161.76 (Adapted Stein & Brown method)
Melting Pt (deg C): 4.13 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 2.31 (Mean VP of Antoine & Grain methods)
VP (Pa, 25 deg C) : 308 (Mean VP of Antoine & Grain methods)
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 1600
log Kow used: 2.10 (estimated)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 4161.4 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Neutral Organics
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 4.91E-006 atm-m3/mole (4.97E-001 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: 2.284E-004 atm-m3/mole (2.314E+001 Pa-m3/mole)
VP: 2.31 mm Hg (source: MPBPVP)
WS: 1.6E+003 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 2.10 (KowWin est)
Log Kaw used: -3.697 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 5.797
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.6903
Biowin2 (Non-Linear Model) : 0.7861
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.9335 (weeks )
Biowin4 (Primary Survey Model) : 3.6743 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.4068
Biowin6 (MITI Non-Linear Model): 0.3584
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.5559
Ready Biodegradability Prediction: NO
Hydrocarbon Biodegradation (BioHCwin v1.01):
LOG BioHC Half-Life (days) : 1.1176
BioHC Half-Life (days) : 13.1109
Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
Vapor pressure (liquid/subcooled): 280 Pa (2.1 mm Hg)
Log Koa (Koawin est ): 5.797
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 1.07E-008
Octanol/air (Koa) model: 1.54E-007
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 3.87E-007
Mackay model : 8.57E-007
Octanol/air (Koa) model: 1.23E-005
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 57.5818 E-12 cm3/molecule-sec
Half-Life = 0.186 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 2.229 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Reaction With Nitrate Radicals May Be Important!
Fraction sorbed to airborne particulates (phi):
6.22E-007 (Junge-Pankow, Mackay avg)
1.23E-005 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 128.3 L/kg (MCI method)
Log Koc: 2.108 (MCI method)
Koc : 66.4 L/kg (Kow method)
Log Koc: 1.822 (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 v3.00):
Log BCF from regression-based method = 1.055 (BCF = 11.35 L/kg wet-wt)
Log Biotransformation Half-life (HL) = -0.7485 days (HL = 0.1784 days)
Log BCF Arnot-Gobas method (upper trophic) = 1.049 (BCF = 11.2)
Log BAF Arnot-Gobas method (upper trophic) = 1.049 (BAF = 11.2)
log Kow used: 2.10 (estimated)
Volatilization from Water:
Henry LC: 4.91E-006 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 131.9 hours (5.494 days)
Half-Life from Model Lake : 1531 hours (63.77 days)
Removal In Wastewater Treatment:
Total removal: 2.62 percent
Total biodegradation: 0.10 percent
Total sludge adsorption: 2.25 percent
Total to Air: 0.28 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 0.473 4.46 1000
Water 27.4 360 1000
Soil 72 720 1000
Sediment 0.189 3.24e+003 0
Persistence Time: 440 hr