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- Non-standard isotope
(~8~C)Methane
C
InChI=1S/CH4/h1H4/i1-4
VNWKTOKETHGBQD-AHCXROLUSA-N
Date of deprecation: 10:59, Apr 9, 2014 Reason for deprecation: Deprecate record: Carbon-8 has a half life of 2.0(4) × 10^-21 s... highly unlikely it would form methane in that time frame.
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Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, version: 14.00
No predicted properties have been calculated for this compound.
Predicted data is generated using the US Environmental Protection Agency�s EPISuite
Log Octanol-Water Partition Coef (SRC): Log Kow (KOWWIN v1.67 estimate) = 0.78 Log Kow (Exper. database match) = 1.09 Exper. Ref: Hansch,C et al. (1995) Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42): Boiling Pt (deg C): -62.40 (Adapted Stein & Brown method) Melting Pt (deg C): -152.93 (Mean or Weighted MP) VP(mm Hg,25 deg C): 5.31E+005 (Mean VP of Antoine & Grain methods) MP (exp database): -182.4 deg C BP (exp database): -161.5 deg C VP (exp database): 4.66E+05 mm Hg at 25 deg C Water Solubility Estimate from Log Kow (WSKOW v1.41): Water Solubility at 25 deg C (mg/L): 2610 log Kow used: 1.09 (expkow database) no-melting pt equation used Water Sol (Exper. database match) = 22 mg/L (25 deg C) Exper. Ref: YALKOWSKY,SH & DANNENFELSER,RM (1992) Water Sol Estimate from Fragments: Wat Sol (v1.01 est) = 428.49 mg/L Wat Sol (Exper. database match) = 22.00 Exper. Ref: YALKOWSKY,SH & DANNENFELSER,RM (1992) ECOSAR Class Program (ECOSAR v0.99h): Class(es) found: Neutral Organics Henrys Law Constant (25 deg C) [HENRYWIN v3.10]: Bond Method : 4.14E-001 atm-m3/mole Group Method: 6.58E-001 atm-m3/mole Exper Database: 6.58E-01 atm-m3/mole Henrys LC [VP/WSol estimate using EPI values]: 6.146E-003 atm-m3/mole Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]: Log Kow used: 1.09 (exp database) Log Kaw used: 1.430 (exp database) Log Koa (KOAWIN v1.10 estimate): -0.340 Log Koa (experimental database): -0.380 Probability of Rapid Biodegradation (BIOWIN v4.10): Biowin1 (Linear Model) : 0.7399 Biowin2 (Non-Linear Model) : 0.9416 Expert Survey Biodegradation Results: Biowin3 (Ultimate Survey Model): 3.1637 (weeks ) Biowin4 (Primary Survey Model) : 3.8246 (days ) MITI Biodegradation Probability: Biowin5 (MITI Linear Model) : 0.6648 Biowin6 (MITI Non-Linear Model): 0.8891 Anaerobic Biodegradation Probability: Biowin7 (Anaerobic Linear Model): 0.7565 Ready Biodegradability Prediction: YES Hydrocarbon Biodegradation (BioHCwin v1.01): LOG BioHC Half-Life (days) : 0.5033 BioHC Half-Life (days) : 3.1866 Sorption to aerosols (25 Dec C)[AEROWIN v1.00]: Vapor pressure (liquid/subcooled): 6.21E+007 Pa (4.66E+005 mm Hg) Log Koa (Exp database): -0.380 Kp (particle/gas partition coef. (m3/ug)): Mackay model : 4.83E-014 Octanol/air (Koa) model: 1.02E-013 Fraction sorbed to airborne particulates (phi): Junge-Pankow model : 1.74E-012 Mackay model : 3.86E-012 Octanol/air (Koa) model: 8.19E-012 Atmospheric Oxidation (25 deg C) [AopWin v1.92]: Hydroxyl Radicals Reaction: OVERALL OH Rate Constant = 0.0069 E-12 cm3/molecule-sec Half-Life = 1559.182 Days (12-hr day; 1.5E6 OH/cm3) Ozone Reaction: No Ozone Reaction Estimation Fraction sorbed to airborne particulates (phi): 2.8E-012 (Junge,Mackay) Note: the sorbed fraction may be resistant to atmospheric oxidation Soil Adsorption Coefficient (PCKOCWIN v1.66): Koc : 4.203 Log Koc: 0.624 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 = 0.139 (BCF = 1.378) log Kow used: 1.09 (expkow database) Volatilization from Water: Henry LC: 0.658 atm-m3/mole (Henry experimental database) Half-Life from Model River: 2.093 hours Half-Life from Model Lake : 2.093 hours Removal In Wastewater Treatment (recommended maximum 95%): Total removal: 99.61 percent Total biodegradation: 0.02 percent Total sludge adsorption: 0.28 percent Total to Air: 99.31 percent (using 10000 hr Bio P,A,S) Level III Fugacity Model: Mass Amount Half-Life Emissions (percent) (hr) (kg/hr) Air 56.8 3.74e+004 1000 Water 42.6 360 1000 Soil 0.502 720 1000 Sediment 0.0871 3.24e+003 0 Persistence Time: 144 hr
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