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CAS Number: 303-07-1

SMILES : O=C(O)c(c(O)ccc1)c1O

CHEM : Benzoic acid, 2,6-dihydroxy-

MOL FOR: C7 H6 O4

MOL WT : 154.12

------------------------------ 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) = 1.76

Log Kow (Exper. database match) = 2.20

Exper. Ref: HANSCH,C ET AL. (1995)

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

Boiling Pt (deg C): 338.41 (Adapted Stein & Brown method)

Melting Pt (deg C): 128.34 (Mean or Weighted MP)

VP(mm Hg,25 deg C): 8.19E-007 (Modified Grain method)

VP (Pa, 25 deg C) : 0.000109 (Modified Grain method)

MP (exp database): 165 dec deg C

Subcooled liquid VP: 2.26E-005 mm Hg (25 deg C, Mod-Grain method)

: 0.00302 Pa (25 deg C, Mod-Grain method)

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

Water Solubility at 25 deg C (mg/L): 3656

log Kow used: 2.20 (expkow database)

no-melting pt equation used

Water Sol (Exper. database match) = 9560 mg/L ( deg C)

Exper. Ref: YALKOWSKY,SH & DANNENFELSER,RM (1992)

Water Sol Estimate from Fragments:

Wat Sol (v1.01 est) = 23433 mg/L

ECOSAR Class Program (ECOSAR v1.00):

Class(es) found:

Salicylic Acid-acid

Phenols, Poly -acid

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

Bond Method : 1.86E-009 atm-m3/mole (1.89E-004 Pa-m3/mole)

Group Method: 6.89E-016 atm-m3/mole (6.99E-011 Pa-m3/mole)

For Henry LC Comparison Purposes:

User-Entered Henry LC: not entered

Henrys LC [via VP/WSol estimate using User-Entered or Estimated values]:

HLC: 4.543E-011 atm-m3/mole (4.603E-006 Pa-m3/mole)

VP: 8.19E-007 mm Hg (source: MPBPVP)

WS: 3.66E+003 mg/L (source: WSKOWWIN)

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

Log Kow used: 2.20 (exp database)

Log Kaw used: -7.119 (HenryWin est)

Log Koa (KOAWIN v1.10 estimate): 9.319

Log Koa (experimental database): None

Probability of Rapid Biodegradation (BIOWIN v4.10):

Biowin1 (Linear Model) : 1.0827

Biowin2 (Non-Linear Model) : 0.9937

Expert Survey Biodegradation Results:

Biowin3 (Ultimate Survey Model): 3.0592 (weeks )

Biowin4 (Primary Survey Model) : 3.7125 (days-weeks )

MITI Biodegradation Probability:

Biowin5 (MITI Linear Model) : 0.7837

Biowin6 (MITI Non-Linear Model): 0.8651

Anaerobic Biodegradation Probability:

Biowin7 (Anaerobic Linear Model): 0.9768

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): 0.00301 Pa (2.26E-005 mm Hg)

Log Koa (Koawin est ): 9.319

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

Mackay model : 0.000996

Octanol/air (Koa) model: 0.000512

Fraction sorbed to airborne particulates (phi):

Junge-Pankow model : 0.0347

Mackay model : 0.0738

Octanol/air (Koa) model: 0.0393

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

Hydroxyl Radicals Reaction:

OVERALL OH Rate Constant = 200.8000 E-12 cm3/molecule-sec

Half-Life = 0.053 Days (12-hr day; 1.5E6 OH/cm3)

Half-Life = 0.639 Hrs

Ozone Reaction:

No Ozone Reaction Estimation

Reaction With Nitrate Radicals May Be Important!

Fraction sorbed to airborne particulates (phi):

0.0542 (Junge-Pankow, Mackay avg)

0.0393 (Koa method)

Note: the sorbed fraction may be resistant to atmospheric oxidation

Soil Adsorption Coefficient (KOCWIN v2.00):

Koc : 28.43 L/kg (MCI method)

Log Koc: 1.454 (MCI method)

Koc : 50.85 L/kg (Kow method)

Log Koc: 1.706 (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) = -1.8302 days (HL = 0.01478 days)

Log BCF Arnot-Gobas method (upper trophic) = 0.607 (BCF = 4.05)

Log BAF Arnot-Gobas method (upper trophic) = 0.607 (BAF = 4.05)

log Kow used: 2.20 (expkow database)

Volatilization from Water:

Henry LC: 1.86E-009 atm-m3/mole (estimated by Bond SAR Method)

Half-Life from Model River: 3.908E+005 hours (1.628E+004 days)

Half-Life from Model Lake : 4.263E+006 hours (1.776E+005 days)

Removal In Wastewater Treatment:

Total removal: 2.48 percent

Total biodegradation: 0.10 percent

Total sludge adsorption: 2.38 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 0.0317 1.28 1000

Water 26.6 360 1000

Soil 73.3 720 1000

Sediment 0.0801 3.24e+003 0

Persistence Time: 603 hr

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