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CAS Number: 65-86-1
SMILES : O=C1NC(=O)NC(C(=O)O)=C1
CHEM : 4-Pyrimidinecarboxylic acid, 1,2,3,6-tetrahydro-2,6-dioxo-
MOL FOR: C5 H4 N2 O4
MOL WT : 156.10
------------------------------ 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) = -0.11
Log Kow (Exper. database match) = -0.83
Exper. Ref: SANGSTER (1994)
Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPVP v1.43):
Boiling Pt (deg C): 448.63 (Adapted Stein & Brown method)
Melting Pt (deg C): 188.60 (Mean or Weighted MP)
VP(mm Hg,25 deg C): 1.66E-010 (Modified Grain method)
VP (Pa, 25 deg C) : 2.22E-008 (Modified Grain method)
MP (exp database): 334.0 deg C
Subcooled liquid VP: 5.31E-007 mm Hg (25 deg C, Mod-Grain method)
: 7.09E-005 Pa (25 deg C, Mod-Grain method)
Water Solubility Estimate from Log Kow (WSKOW v1.41):
Water Solubility at 25 deg C (mg/L): 1.786e+004
log Kow used: -0.83 (expkow database)
no-melting pt equation used
Water Sol (Exper. database match) = 1820 mg/L (18 deg C)
Exper. Ref: YALKOWSKY,SH & HE,Y (2003)
Water Sol (Exper. database match) = 1700 mg/L ( deg C)
Exper. Ref: MERCK INDEX (1996)
Water Sol Estimate from Fragments:
Wat Sol (v1.01 est) = 75289 mg/L
ECOSAR Class Program (ECOSAR v1.00):
Class(es) found:
Amides -acid
Imide Acids -acid
Henrys Law Constant (25 deg C) [HENRYWIN v3.20]:
Bond Method : 8.10E-015 atm-m3/mole (8.20E-010 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: 1.909E-015 atm-m3/mole (1.934E-010 Pa-m3/mole)
VP: 1.66E-010 mm Hg (source: MPBPVP)
WS: 1.79E+004 mg/L (source: WSKOWWIN)
Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
Log Kow used: -0.83 (exp database)
Log Kaw used: -12.480 (HenryWin est)
Log Koa (KOAWIN v1.10 estimate): 11.650
Log Koa (experimental database): None
Probability of Rapid Biodegradation (BIOWIN v4.10):
Biowin1 (Linear Model) : 0.7459
Biowin2 (Non-Linear Model) : 0.8077
Expert Survey Biodegradation Results:
Biowin3 (Ultimate Survey Model): 3.2188 (weeks )
Biowin4 (Primary Survey Model) : 4.0081 (days )
MITI Biodegradation Probability:
Biowin5 (MITI Linear Model) : 0.4351
Biowin6 (MITI Non-Linear Model): 0.3063
Anaerobic Biodegradation Probability:
Biowin7 (Anaerobic Linear Model): 0.9493
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): 7.08E-005 Pa (5.31E-007 mm Hg)
Log Koa (Koawin est ): 11.650
Kp (particle/gas partition coef. (m3/ug)):
Mackay model : 0.0424
Octanol/air (Koa) model: 0.11
Fraction sorbed to airborne particulates (phi):
Junge-Pankow model : 0.605
Mackay model : 0.772
Octanol/air (Koa) model: 0.898
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 8.9072 E-12 cm3/molecule-sec
Half-Life = 1.201 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 14.410 Hrs
Ozone Reaction:
OVERALL Ozone Rate Constant = 0.175000 E-17 cm3/molecule-sec
Half-Life = 6.549 Days (at 7E11 mol/cm3)
Fraction sorbed to airborne particulates (phi):
0.689 (Junge-Pankow, Mackay avg)
0.898 (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 : 0.5076 L/kg (Kow method)
Log Koc: -0.295 (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 = 0.500 (BCF = 3.162 L/kg wet-wt)
Log Biotransformation Half-life (HL) = -2.9682 days (HL = 0.001076 days)
Log BCF Arnot-Gobas method (upper trophic) = -0.048 (BCF = 0.8959)
Log BAF Arnot-Gobas method (upper trophic) = -0.048 (BAF = 0.8959)
log Kow used: -0.83 (expkow database)
Volatilization from Water:
Henry LC: 8.1E-015 atm-m3/mole (estimated by Bond SAR Method)
Half-Life from Model River: 9.031E+010 hours (3.763E+009 days)
Half-Life from Model Lake : 9.852E+011 hours (4.105E+010 days)
Removal In Wastewater Treatment:
Total removal: 1.85 percent
Total biodegradation: 0.09 percent
Total sludge adsorption: 1.76 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 2.27e-005 24.4 1000
Water 30.6 360 1000
Soil 69.4 720 1000
Sediment 0.0688 3.24e+003 0
Persistence Time: 640 hr