DL-Homocysteine C4H9NO2S structure

C4H9NO2S structure
Molecular Formula C4H9NO2S
Average mass 135.185 Da
Density 1.3±0.1 g/cm3
Boiling Point 299.7±35.0 °C at 760 mmHg
Flash Point 135.0±25.9 °C
Molar Refractivity 33.5±0.3 cm3
Polarizability 13.3±0.5 10-24cm3
Surface Tension 54.4±3.0 dyne/cm
Molar Volume 107.3±3.0 cm3

Predicted data is generated using the ACD/Labs Percepta Platform – PhysChem Module

Density: 1.3±0.1 g/cm3
Boiling Point: 299.7±35.0 °C at 760 mmHg
Vapour Pressure: 0.0±1.3 mmHg at 25°C
Enthalpy of Vaporization: 59.4±6.0 kJ/mol
Flash Point: 135.0±25.9 °C
Index of Refraction: 1.538
Molar Refractivity: 33.5±0.3 cm3
#H bond acceptors: 3
#H bond donors: 3
#Freely Rotating Bonds: 3
#Rule of 5 Violations: 0
ACD/LogP: 0.22
ACD/LogD (pH 5.5): -2.44
ACD/BCF (pH 5.5): 1.00
ACD/KOC (pH 5.5): 1.00
ACD/LogD (pH 7.4): -2.44
ACD/BCF (pH 7.4): 1.00
ACD/KOC (pH 7.4): 1.00
Polar Surface Area: 102 Å2
Polarizability: 13.3±0.5 10-24cm3
Surface Tension: 54.4±3.0 dyne/cm
Molar Volume: 107.3±3.0 cm3

Predicted data is generated using the US Environmental Protection Agency’s EPISuite™

 
 Log Octanol-Water Partition Coef (SRC):
 Log Kow (KOWWIN v1.67 estimate) = -2.56

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
 Boiling Pt (deg C): 360.24 (Adapted Stein & Brown method)
 Melting Pt (deg C): 209.42 (Mean or Weighted MP)
 VP(mm Hg,25 deg C): 4.4E-007 (Modified Grain method)
 MP (exp database): 232.5 deg C
 Subcooled liquid VP: 7.53E-005 mm Hg (25 deg C, Mod-Grain method)

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
 Water Solubility at 25 deg C (mg/L): 1.136e+005
 log Kow used: -2.56 (estimated)
 no-melting pt equation used

 Water Sol Estimate from Fragments:
 Wat Sol (v1.01 est) = 48863 mg/L

 ECOSAR Class Program (ECOSAR v0.99h):
 Class(es) found:
 Aliphatic Amines-acid
 Thiols(mercaptans)-acid

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
 Bond Method : 7.03E-011 atm-m3/mole
 Group Method: Incomplete
 Henrys LC [VP/WSol estimate using EPI values]: 6.889E-013 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
 Log Kow used: -2.56 (KowWin est)
 Log Kaw used: -8.542 (HenryWin est)
 Log Koa (KOAWIN v1.10 estimate): 5.982
 Log Koa (experimental database): None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
 Biowin1 (Linear Model) : 0.9097
 Biowin2 (Non-Linear Model) : 0.9449
 Expert Survey Biodegradation Results:
 Biowin3 (Ultimate Survey Model): 3.2895 (days-weeks )
 Biowin4 (Primary Survey Model) : 4.0816 (days )
 MITI Biodegradation Probability:
 Biowin5 (MITI Linear Model) : 0.5726
 Biowin6 (MITI Non-Linear Model): 0.5578
 Anaerobic Biodegradation Probability:
 Biowin7 (Anaerobic Linear Model): 1.0863
 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): 0.01 Pa (7.53E-005 mm Hg)
 Log Koa (Koawin est ): 5.982
 Kp (particle/gas partition coef. (m3/ug)):
 Mackay model : 0.000299 
 Octanol/air (Koa) model: 2.36E-007 
 Fraction sorbed to airborne particulates (phi):
 Junge-Pankow model : 0.0107 
 Mackay model : 0.0233 
 Octanol/air (Koa) model: 1.88E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
 Hydroxyl Radicals Reaction:
 OVERALL OH Rate Constant = 81.0376 E-12 cm3/molecule-sec
 Half-Life = 0.132 Days (12-hr day; 1.5E6 OH/cm3)
 Half-Life = 1.584 Hrs
 Ozone Reaction:
 No Ozone Reaction Estimation
 Fraction sorbed to airborne particulates (phi): 0.017 (Junge,Mackay)
 Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
 Koc : 5.073
 Log Koc: 0.705 

 Aqueous Base/Acid-Catalyzed Hydrolysis (25 deg C) [HYDROWIN v1.67]:
 Rate constants can NOT be estimated for this structure!

 Bioaccumulation Estimates from Log Kow (BCFWIN v2.17):
 Log BCF from regression-based method = 0.500 (BCF = 3.162)
 log Kow used: -2.56 (estimated)

 Volatilization from Water:
 Henry LC: 7.03E-011 atm-m3/mole (estimated by Bond SAR Method)
 Half-Life from Model River: 9.683E+006 hours (4.035E+005 days)
 Half-Life from Model Lake : 1.056E+008 hours (4.401E+006 days)

 Removal In Wastewater Treatment:
 Total removal: 1.85 percent
 Total biodegradation: 0.09 percent
 Total sludge adsorption: 1.75 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 0.00254 3.17 1000 
 Water 34.5 208 1000 
 Soil 65.4 416 1000 
 Sediment 0.0597 1.87e+003 0 
 Persistence Time: 386 hr




 

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