Methamidophos

Experimental data
Predicted - ACD/Labs
Predicted - EPISuite
Predicted - ChemAxon

Experimental Physico-chemical Properties

Experimental Melting Point:

Experimental Flash Point:

212 °C OU Chemical Safety Data (No longer updated) More details

212 °C Sigma-Aldrich SIAL-33395

Miscellaneous

Appearance:

off-white crystalline solid OU Chemical Safety Data (No longer updated) More details
Stability:

Stable. Incompatible with strong oxidizing agents,copper, copper alloys. OU Chemical Safety Data (No longer updated) More details

Retention Index (Normal Alkane):

1225.9 (Program type: Complex; Column... (show more) class: Standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50C(1min) =>20C/min =>120C => 5C/min => 300C(10min); CAS no: 10265926; Active phase: DB-1; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Shimadzu Corporation, Analysis of 124 pesticides with capillary GC-FTD and GC-ECD, 2003.) NIST Spectra nist ri

1235 (Program type: Complex; Column... (show more) class: Standard non-polar; Column diameter: 0.25 mm; Column length: 50 m; Column type: Capillary; Description: 80C(1min)=> 10C/min =>150C=> 3C/min =>220C => 40C/min =>280C; CAS no: 10265926; Active phase: CP Sil 5 CB; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Ma, X.; Li, C.; Tao, C.; Liu, W.; Zheng, S., Multi-residue determination of 41 insecticides in garlic by gas chromatography and ion trap mass spectrometry using the selective ion storage technique, Rapid Commun. Mass Spectrom., 15, 2001, 15-19.) NIST Spectra nist ri

1230 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50 0C(1 min) ^ 25 0C/min -> 125 0C ^ 10 0C/min -> 300 0C (10 min); CAS no: 10265926; Active phase: 5 % Phenyl methyl siloxane; Carrier gas: Helium; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Department of Food Safety, Ministry of Health; Welfare, Analytical methods for residual compositional substances of agricultural chemicals, feed aadditives, and veterinary drugs in foods, 2006.) NIST Spectra nist ri

1215.7 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 80C(1min) => 10C/min =>160C (5min) => 3C/min =>240C =>25C/min =>280C(10min); CAS no: 10265926; Active phase: DB-5MS; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Chu, X.-G.; Hu, X.-Z.; Yao, H.-Y., Determination of 266 pesticide residues in apple juice by matrix solid-phase dispersion and gas chromatography-mass selective detection, J. Chromatogr. A, 1063, 2005, 201-210.) NIST Spectra nist ri

1243.5 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 15 K/min; Start T: 57 C; End T: 290 C; End time: 15 min; Start time: 1.5 min; CAS no: 10265926; Active phase: HP-5; Carrier gas: He; Phase thickness: 0.2 um; Data type: Normal alkane RI; Authors: Haib, J.; Hofer, I.; Renaud, J.-M., Analysis of multiple pesticide residues in tobacco using pressurized liquid extraction, automated solid-phase extraction clean-up and gas chromatography-tandem mass spectrometry, J. Chromatogr. A, 1020, 2003, 173-187.) NIST Spectra nist ri

1224.7 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50C(1min) =>20C/min =>120C => 5C/min => 300C(10min); CAS no: 10265926; Active phase: DB-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Shimadzu Corporation, Analysis of 124 pesticides with capillary GC-FTD and GC-ECD, 2003.) NIST Spectra nist ri

1239.1 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 70 C (3.5 min) ^ 50 C/min -> 150 C ^ 5 C/min -> 180 C (5 min) ^ 4 C/min -> 205 C (5 min) ^ 4 C/min -> 300 C (5 min); CAS no: 10265926; Active phase: DB-5MS; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Martinez Vidal, J.L.; Arrebola, F.J.; Mateu-Sanchez, M., Application of gas chromatography-tandem mass spectrometry to the analysis of pesticides in fruits and vegetables, J. Chromatogr. A, 959, 2002, 203-213.) NIST Spectra nist ri

1217.7 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 45 0C (2.66 min) ^ 40 0C/min -> 170 0C ^ 4 0C/min -> 220 0C ^ 20 0C/min -> 280 0C (15.72 min); CAS no: 10265926; Active phase: HP-5; Carrier gas: He; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Frenzel, T.; Sochor, H.; Speer, K.; Uihlein, M., Rapid multimethod for verification and determination of toxic pesticides in whole blood by means of capillary GC-MS, J. Anal. Toxicol., 24, 2000, 365-371.) NIST Spectra nist ri

1222.6 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.2 mm; Column length: 25 m; Column type: Capillary; Description: 100C(1min) => 30C/min=> 150C(2min) => 3C/min=> 205C => 10C/min =>260C(29min); CAS no: 10265926; Active phase: SE-54; Phase thickness: 0.33 um; Data type: Normal alkane RI; Authors: Stan, H.-J., Pesticide residue analysis in foodstuffs applying capillary gas chromatography with mass spectrometric detection State-of-the-art use of modified DFG-multimethod S19 and automated data evaluation, J. Chromatogr. A, 892, 2000, 347-377.) NIST Spectra nist ri

1229.4 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Description: 50 C (1.13 min) ^ 30 C/min -> 150 C ^ 3 C/min -> 205 C ^ 10 C/min -> 250 C (20 min); CAS no: 10265926; Active phase: HP-5; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Cook, J.; Engel, M.; Wylie, P.; Quimby, B., Multiresidue screening of pesticides in foods using retention time locking, GC-AED, database search, and GC/MS identification, J. AOAC Int., 82(2), 1999, 313-326.) NIST Spectra nist ri

1223.2 (Program type: Complex; Column... (show more) class: Semi-standard non-polar; Column diameter: 0.2 mm; Column length: 25 m; Column type: Capillary; Description: 85 0C (1 min) ^ 40 0C/min -> 150 0C (2 min) ^ 10 0C/min -> 280 0C (20 min); CAS no: 10265926; Active phase: HP-5; Carrier gas: He; Phase thickness: 0.33 um; Data type: Normal alkane RI; Authors: Holland, P.T.; McNaughton, D.E.; Malcolm, C.P., Multiresidue analysis of pesticides in wines by solid-phase extraction, J. AOAC Int., 77(1), 1994, 79-86.) NIST Spectra nist ri

1245.2 (Program type: Ramp; Column cl... (show more) ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 25 m; Column type: Capillary; Heat rate: 15 K/min; Start T: 80 C; End T: 280 C; CAS no: 10265926; Active phase: DB-5; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Kwakman, P.J.M.; Vreuls, J.J.; Brinkman, U.A.Th.; Ghijsen, R.T., Determination of organophosphorus pesticides in aqueous samples by on-line membrane disk extraction and capillary gas chromatography, Chromatographia, 34(1/2), 1992, 41-47.) NIST Spectra nist ri

Retention Index (Linear):

Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, version: 14.00

Density:	1.3±0.1 g/cm³
Boiling Point:	208.7±23.0 °C at 760 mmHg
Vapour Pressure:	0.2±0.4 mmHg at 25°C
Enthalpy of Vaporization:	44.5±3.0 kJ/mol
Flash Point:	80.0±22.6 °C
Index of Refraction:	1.485
Molar Refractivity:	31.5±0.3 cm³
#H bond acceptors:	3
#H bond donors:	2
#Freely Rotating Bonds:	2
#Rule of 5 Violations:	0

ACD/LogP:	-0.82
ACD/LogD (pH 5.5):	-0.56
ACD/BCF (pH 5.5):	1.00
ACD/KOC (pH 5.5):	11.83
ACD/LogD (pH 7.4):	-0.56
ACD/BCF (pH 7.4):	1.00
ACD/KOC (pH 7.4):	11.83
Polar Surface Area:	87 Å²
Polarizability:	12.5±0.5 10^-24cm³
Surface Tension:	44.4±3.0 dyne/cm
Molar Volume:	109.7±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) =  -0.93
    Log Kow (Exper. database match) =  -0.80
       Exper. Ref:  Tomlin,C (1997)

 Boiling Pt, Melting Pt, Vapor Pressure Estimations (MPBPWIN v1.42):
    Boiling Pt (deg C):  222.87  (Adapted Stein & Brown method)
    Melting Pt (deg C):  14.56  (Mean or Weighted MP)
    VP(mm Hg,25 deg C):  0.068  (Modified Grain method)
    MP  (exp database):  46 deg C
    VP  (exp database):  3.53E-05 mm Hg at 25 deg C
    Subcooled liquid VP: 5.69E-005 mm Hg (25 deg C, exp database VP )

 Water Solubility Estimate from Log Kow (WSKOW v1.41):
    Water Solubility at 25 deg C (mg/L):  3.994e+005
       log Kow used: -0.80 (expkow database)
       no-melting pt equation used
     Water Sol (Exper. database match) =  1e+006 mg/L (20 deg C)
        Exper. Ref:  YALKOWSKY,SH & DANNENFELSER,RM (1992)

 Water Sol Estimate from Fragments:
    Wat Sol (v1.01 est) =  1e+006 mg/L
    Wat Sol (Exper. database match) =  1000000.00
       Exper. Ref:  YALKOWSKY,SH & DANNENFELSER,RM (1992)

 ECOSAR Class Program (ECOSAR v0.99h):
    Class(es) found:
       Esters
       Esters (phosphate)

 Henrys Law Constant (25 deg C) [HENRYWIN v3.10]:
   Bond Method :   8.68E-010  atm-m3/mole
   Group Method:   Incomplete
 Henrys LC [VP/WSol estimate using EPI values]:  3.162E-008 atm-m3/mole

 Log Octanol-Air Partition Coefficient (25 deg C) [KOAWIN v1.10]:
  Log Kow used:  -0.80  (exp database)
  Log Kaw used:  -7.450  (HenryWin est)
      Log Koa (KOAWIN v1.10 estimate):  6.650
      Log Koa (experimental database):  None

 Probability of Rapid Biodegradation (BIOWIN v4.10):
   Biowin1 (Linear Model)         :   0.6804
   Biowin2 (Non-Linear Model)     :   0.7320
 Expert Survey Biodegradation Results:
   Biowin3 (Ultimate Survey Model):   2.8873  (weeks       )
   Biowin4 (Primary Survey Model) :   3.6441  (days-weeks  )
 MITI Biodegradation Probability:
   Biowin5 (MITI Linear Model)    :   0.2931
   Biowin6 (MITI Non-Linear Model):   0.1810
 Anaerobic Biodegradation Probability:
   Biowin7 (Anaerobic Linear Model):  0.6769
 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):  0.00759 Pa (5.69E-005 mm Hg)
  Log Koa (Koawin est  ): 6.650
   Kp (particle/gas partition coef. (m3/ug)):
       Mackay model           :  0.000395 
       Octanol/air (Koa) model:  1.1E-006 
   Fraction sorbed to airborne particulates (phi):
       Junge-Pankow model     :  0.0141 
       Mackay model           :  0.0307 
       Octanol/air (Koa) model:  8.77E-005 

 Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
   Hydroxyl Radicals Reaction:
      OVERALL OH Rate Constant =  33.0760 E-12 cm3/molecule-sec
      Half-Life =     0.323 Days (12-hr day; 1.5E6 OH/cm3)
      Half-Life =     3.881 Hrs
   Ozone Reaction:
      No Ozone Reaction Estimation
   Fraction sorbed to airborne particulates (phi): 0.0224 (Junge,Mackay)
    Note: the sorbed fraction may be resistant to atmospheric oxidation

 Soil Adsorption Coefficient (PCKOCWIN v1.66):
      Koc    :  3.848
      Log Koc:  0.585 

 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: -0.80 (expkow database)

 Volatilization from Water:
    Henry LC:  8.68E-010 atm-m3/mole  (estimated by Bond SAR Method)
    Half-Life from Model River: 8.013E+005  hours   (3.339E+004 days)
    Half-Life from Model Lake : 8.742E+006  hours   (3.642E+005 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       0.02            7.76         1000       
   Water     39.1            360          1000       
   Soil      60.8            720          1000       
   Sediment  0.0716          3.24e+003    0          
     Persistence Time: 572 hr

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More details:

Experimental Melting Point:

Experimental Flash Point:

Appearance:

Stability:

Toxicity:

Safety:

Chemical Class:

Retention Index (Kovats):

Retention Index (Normal Alkane):

Retention Index (Linear):

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