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CAS Number: 97-59-6
SMILES : O=C(NC(NC(=O)N1)C1(=O))N
CHEM : Urea, (2,5-dioxo-4-imidazolidinyl)-
MOL FOR: C4 H6 N4 O3
MOL WT : 158.12
------------------------------ 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) = -3.14
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 461.09 (Adapted Stein & Brown method)
Melting Pt (deg C): 194.42 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 1.3E-009 (Modified Grain method)
VP (Pa, 25 deg C) : 1.74E-007 (Modified Grain method)
MP (exp database): 238 deg C
Subcooled liquid VP: 2.6E-007 mm Hg (25 deg C, Mod-Grain method)
: 3.47E-005 Pa (25 deg C, Mod-Grain method)
Water Solubility Estimate from Log Kow (WSKOW v1.42):
Water Solubility at 25 deg C (mg/L): 1e+006
log Kow used: -3.14 (estimated)
no-melting pt equation used
Water Sol (Exper. database match) = 5260 mg/L ( deg C)
Exper. Ref: YALKOWSKY,SH & HE,Y (2003)
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 1e+006 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Imides
Substituted Ureas
Amides
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 3.41E-018 atm-m3/mole (3.45E-013 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: 2.705E-016 atm-m3/mole (2.741E-011 Pa-m3/mole)
VP: 1.3E-009 mm Hg (source: MPBPVP)
WS: 1E+006 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: -3.14 (KowWin est)
Log Kaw used: -15.856 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 12.716
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.6723
Biowin2 (Non-Linear Model) : 0.6821
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 2.8498 (weeks )
Biowin4 (Primary Survey Model) : 3.6196 (days-weeks )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.2542
Biowin6 (MITI Non-Linear Model): 0.1026
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.8755
Ready Biodegradability Prediction: NO
Hydrocarbon Biodegradation (BioHCwin v1.01):
Structure incompatible with current estimation method!
Sorption to aerosols (25 Dec C)[AEROWIN v1.00]:
Vapor pressure (liquid/subcooled): 3.47E-005 Pa (2.6E-007 mm Hg)
Log Koa (Koawin est ): 12.716
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 0.0865
Octanol/air (Koa) model: 1.28
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 0.758
Mackay model : 0.874
Octanol/air (Koa) model: 0.99
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 19.6535 E-12 cm3/molecule-sec
Half-Life = 0.544 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 6.531 Hrs
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
0.816 (Junge-Pankow, Mackay avg)
0.99 (Koa method)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Soil Adsorption Coefficient (KOCWIN v2.00):
Koc : 10 L/kg (MCI method)
Log Koc: 1.000 (MCI method)
Koc : 0.132 L/kg (Kow method)
Log Koc: -0.880 (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) = -5.4043 days (HL = 3.942e-006 days)
Log BCF Arnot-Gobas method (upper trophic) = -0.049 (BCF = 0.893)
Log BAF Arnot-Gobas method (upper trophic) = -0.049 (BAF = 0.893)
log Kow used: -3.14 (estimated)
Volatilization from Water:
Henry LC: 3.41E-018 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 2.159E+014 hours (8.996E+012 days)
Half-Life from Model Lake : 2.355E+015 hours (9.814E+013 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 1.13e-009 13.1 1000
Water 30.6 360 1000
Soil 69.4 720 1000
Sediment 0.0688 3.24e+003 0
Persistence Time: 640 hr