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 Num: 000638-02-8
SMILES : s(c(c1)C)c(c1)C
CHEM : THIOPHENE, 2,5-DIMETHYL-
MOL FOR: C6 H8 S1
MOL WT : 112.19
------------------------------ 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) = 2.91
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.43):
Boiling Pt (deg C): 159.09 (Adapted Stein & Brown method)
Melting Pt (deg C): -8.70 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 7.46 (Mean VP of Antoine & Grain methods)
VP (Pa, 25 deg C) : 994 (Mean VP of Antoine & Grain methods)
MP (exp database): -62.6 deg C
BP (exp database): 136.5 deg C
VP (exp database): 9.86E+00 mm Hg (1.31E+003 Pa) at 25 deg C
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 351.5
log Kow used: 2.91 (estimated)
no-melting pt equation used
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 427.27 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Thiophenes
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 3.57E-003 atm-m3/mole (3.61E+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: 3.133E-003 atm-m3/mole (3.174E+002 Pa-m3/mole)
VP: 7.46 mm Hg (source: MPBPVP)
WS: 352 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: 2.91 (KowWin est)
Log Kaw used: -0.836 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 3.746
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.8035
Biowin2 (Non-Linear Model) : 0.9289
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.8015 (weeks )
Biowin4 (Primary Survey Model) : 3.5488 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.4777
Biowin6 (MITI Non-Linear Model): 0.5353
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): -0.0983
Ready Biodegradability Prediction: NO
Hydrocarbon Biodegradation (BioHCwin v1.01):
LOG BioHC Half-Life (days) : 1.0946
BioHC Half-Life (days) : 12.4335
Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
Vapor pressure (liquid/subcooled): 1.31E+003 Pa (9.86 mm Hg)
Log Koa (Koawin est ): 3.746
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 2.28E-009
Octanol/air (Koa) model: 1.37E-009
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 8.24E-008
Mackay model : 1.83E-007
Octanol/air (Koa) model: 1.09E-007
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 30.7701 E-12 cm3/molecule-sec
Half-Life = 0.348 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 4.171 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
1.32E-007 (Junge-Pankow, Mackay avg)
1.09E-007 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 205.9 L/kg (MCI method)
Log Koc: 2.314 (MCI method)
Koc : 335.1 L/kg (Kow method)
Log Koc: 2.525 (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 = 1.586 (BCF = 38.51 L/kg wet-wt)
Log Biotransformation Half-life (HL) = -0.5736 days (HL = 0.2669 days)
Log BCF Arnot-Gobas method (upper trophic) = 1.677 (BCF = 47.56)
Log BAF Arnot-Gobas method (upper trophic) = 1.677 (BAF = 47.56)
log Kow used: 2.91 (estimated)
Volatilization from Water:
Henry LC: 0.00357 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 1.255 hours
Half-Life from Model Lake : 102.5 hours (4.271 days)
Removal In Wastewater Treatment:
Total removal: 59.89 percent
Total biodegradation: 0.06 percent
Total sludge adsorption: 3.26 percent
Total to Air: 56.56 percent
(using 10000 hr Bio P,A,S)
Level III Fugacity Model:
Mass Amount Half-Life Emissions
(percent) (hr) (kg/hr)
Air 4.86 8.34 1000
Water 39.9 360 1000
Soil 54.9 720 1000
Sediment 0.389 3.24e+003 0
Persistence Time: 161 hr