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CAS Num: 005756-24-1

SMILES : S(SSSC)C

CHEM : Tetrasulfide, dimethyl

MOL FOR: C2 H6 S4

MOL WT : 158.31

------------------------------ EPI SUMMARY (v4.00) --------------------------

Physical Property Inputs:

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

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

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

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

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

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

Log Octanol-Water Partition Coef (SRC):

Log Kow (KOWWIN v1.67 estimate) = 1.87

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

Boiling Pt (deg C): 233.52 (Adapted Stein & Brown method)

Melting Pt (deg C): -0.28 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 0.065 (Mean VP of Antoine & Grain methods)

VP (Pa, 25 deg C) : 8.67 (Mean VP of Antoine & Grain methods)

Water Solubility Estimate from Log Kow (WSKOW v1.41):

Water Solubility at 25 deg C (mg/L): 1751

log Kow used: 1.87 (estimated)

no-melting pt equation used

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 3051.4 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:

Neutral Organics

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

Bond Method : 2.89E-003 atm-m3/mole (2.93E+002 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: 7.733E-006 atm-m3/mole (7.835E-001 Pa-m3/mole)

VP: 0.065 mm Hg (source: MPBPVP)

WS: 1.75E+003 mg/L (source: WSKOWWIN)

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

Log Kow used: 1.87 (KowWin est)

Log Kaw used: -0.928 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 2.798

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 0.6722

Biowin2 (Non-Linear Model) : 0.6815

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 2.8493 (weeks )

Biowin4 (Primary Survey Model) : 3.6193 (days-weeks )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.2420

Biowin6 (MITI Non-Linear Model): 0.1186

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.6769

Ready Biodegradability Prediction: NO

Hydrocarbon Biodegradation (BioHCwin v1.01):

LOG BioHC Half-Life (days) : 0.5616

BioHC Half-Life (days) : 3.6442

Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:

Vapor pressure (liquid/subcooled): 8.23 Pa (0.0617 mm Hg)

Log Koa (Koawin est ): 2.798

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

Mackay model : 3.65E-007

Octanol/air (Koa) model: 1.54E-010

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 1.32E-005

Mackay model : 2.92E-005

Octanol/air (Koa) model: 1.23E-008

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 452.1216 E-12 cm3/molecule-sec

Half-Life = 0.024 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 17.033 Min

Ozone Reaction:

No Ozone Reaction Estimation

Fraction sorbed to airborne particulates (phi):

2.12E-005 (Junge-Pankow, Mackay avg)

1.23E-008 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 131.5 L/kg (MCI method)

Log Koc: 2.119 (MCI method)

Koc : 41.93 L/kg (Kow method)

Log Koc: 1.623 (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 = -0.437 (BCF = 0.3653 L/kg wet-wt)

Log Biotransformation Half-life (HL) = -0.8771 days (HL = 0.1327 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.839 (BCF = 6.904)

Log BAF Arnot-Gobas method (upper trophic) = 0.839 (BAF = 6.904)

log Kow used: 1.87 (estimated)

Volatilization from Water:

Henry LC: 0.00289 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River: 1.539 hours

Half-Life from Model Lake : 122.3 hours (5.095 days)

Removal In Wastewater Treatment:

Total removal: 54.22 percent

Total biodegradation: 0.05 percent

Total sludge adsorption: 1.18 percent

Total to Air: 52.99 percent

(using 10000 hr Bio P,A,S)

Level III Fugacity Model:

Mass Amount Half-Life Emissions

(percent) (hr) (kg/hr)

Air 0.426 0.568 1000

Water 45.9 360 1000

Soil 53.3 720 1000

Sediment 0.323 3.24e+003 0

Persistence Time: 141 hr

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