Methylparaben

• Formula: C₈H₈O₃
• Molecular weight: 152.1473
• IUPAC Standard InChI: InChI=1S/C8H8O3/c1-11-8(10)6-2-4-7(9)5-3-6/h2-5,9H,1H3 Copy

  
• IUPAC Standard InChIKey: LXCFILQKKLGQFO-UHFFFAOYSA-N Copy
• CAS Registry Number: 99-76-3
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Benzoic acid, 4-hydroxy-, methyl ester; Benzoic acid, p-hydroxy-, methyl ester; p-Carbomethoxyphenol; p-Hydroxybenzoic acid, methyl ester; p-Methoxycarbonylphenol; Abiol; Maseptol; Methaben; Methyl chemosept; Methyl p-hydroxybenzoate; Methyl Butex; Methyl Parasept; Methyl 4-hydroxybenzoate; Methylben; Metoxyde; Moldex; Nipagin; Nipagin M; Paridol; Preserval; Preserval M; Septos; Solbrol; Solbrol M; Tegosept M; 4-(Methoxycarbonyl)phenol; 4-Hydroxybenzoic acid, methyl ester; Aseptoform; Metaben; Methyl ester of p-hydroxybenzoic acid; Methylester kyseliny p-hydroxybenzoove; Methyl parahydroxybenzoate; p-Oxybenzoesauremethylester; Lexgard M; NSC 3827; Paraben M; Metagin; p-Hydroxybenzoic methyl ester; component of Heb-Cort MC; Paraben; Parasept; Methyl p-oxybenzoate; Methyl //p//-Hydroxybenzoate; Methylparaben USP; Nigagin; Solparol; Preserval MS; Solparol (Salt/Mix); Preserval MS (Salt/Mix)
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• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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Phase change data

Go To: Top, Gas phase ion energetics data, Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Enthalpy of fusion

Gas phase ion energetics data

Go To: Top, Phase change data, Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess

De-protonation reactions

C₈H₇O₃^- +  =

By formula: C₈H₇O₃^- + H⁺ = C₈H₈O₃

Gas Chromatography

Go To: Top, Phase change data, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

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Kovats' RI, non-polar column, custom temperature program

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Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Van Den Dool and Kratz RI, non-polar column, custom temperature program

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Van Den Dool and Kratz RI, polar column, temperature ramp

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Normal alkane RI, non-polar column, temperature ramp

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Normal alkane RI, non-polar column, custom temperature program

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Normal alkane RI, polar column, temperature ramp

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References

Go To: Top, Phase change data, Gas phase ion energetics data, Gas Chromatography, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Manzo and Ahumanda, 1990
Manzo, R.H.; Ahumanda, A.A., Effects of solvent medium on solubility. V: Enthalpic and entropic contributions to the free energy changes of Di-substituted benzene derivatives in ethanol: Water and ethanol: Cyclohexane mixtures, J. Pharm. Sci., 1990, 79, 12, 1109, https://doi.org/10.1002/jps.2600791214 . [all data]

Temprado, Roux, et al., 2005
Temprado, Manuel; Roux, Maria Victoria; Umnahanant, Patamaporn; Zhao, Hui; Chickos, James S., The Thermochemistry of 2,4-Pentanedione Revisited: Observance of a Nonzero Enthalpy of Mixing between Tautomers and Its Effects on Enthalpies of Formation, J. Phys. Chem. B, 2005, 109, 25, 12590-12595, https://doi.org/10.1021/jp0515131 . [all data]

Perlovich, Rodionov, et al., 2005
Perlovich, German L.; Rodionov, Sergey V.; Bauer-Brandl, Annette, Thermodynamics of solubility, sublimation and solvation processes of parabens, European Journal of Pharmaceutical Sciences, 2005, 24, 1, 25-33, https://doi.org/10.1016/j.ejps.2004.09.007 . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Giordano, Bettini, et al., 1999
Giordano, Ferdinando; Bettini, Ruggero; Donini, Cristina; Gazzaniga, Andrea; Caira, Mino R.; Zhang, Geoffrey G.Z.; Grant, David J.W., Physical properties of parabens and their mixtures: Solubility in water, thermal behavior, and crystal structures, J. Pharm. Sci., 1999, 88, 11, 1210-1216, https://doi.org/10.1021/js9900452 . [all data]

Manzo and Ahumada, 1990
Manzo, Ruben H.; Ahumada, Amelia A., Effects of solvent medium on solubility. V: Enthalpic and entropic contributions to the free energy changes of Di-substituted benzene derivatives in ethanol: Water and ethanol: Cyclohexane mixtures, J. Pharm. Sci., 1990, 79, 12, 1109-1115, https://doi.org/10.1002/jps.2600791214 . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Fujio, McIver, et al., 1981
Fujio, M.; McIver, R.T., Jr.; Taft, R.W., Effects on the acidities of phenols from specific substituent-solvent interactions. Inherent substituent parameters from gas phase acidities, J. Am. Chem. Soc., 1981, 103, 4017. [all data]

Fedoreev and Maksimov, 1977
Fedoreev, S.A.; Maksimov, O.B., The study of the composition of aromatic esters by gas-liquid chromatography, Solid Fuel Chem. (Engl. Transl.), 1977, 17-22. [all data]

Ramsey, Lee, et al., 1980
Ramsey, J.D.; Lee, T.D.; Osselton, M.D.; Moffat, A.C., Gas-liquid chromatographic retention indices of 296 non-drug substances on SE-30 or OV-1 likely to be encountered in toxicological analyses, J. Chromatogr., 1980, 184, 2, 185-206, https://doi.org/10.1016/S0021-9673(00)85641-1 . [all data]

Lalel, Singh, et al., 2003
Lalel, H.J.D.; Singh, Z.; Chye Tan, S., Glycosidically-bound aroma volatile compounds in the skin and pulp of 'Kensington Pride' mango fruit at different stages of maturity, Postharvest Biol. Technol., 2003, 29, 2, 205-218, https://doi.org/10.1016/S0925-5214(02)00250-8 . [all data]

da Silva, Borba, et al., 1999
da Silva, U.F.; Borba, E.L.; Semir, J.; Marsaioli, A.J., A simple solid injection device for the analyses of Bulbophyllum (Orchidaceae) volatiles, Phytochemistry, 1999, 50, 1, 31-34, https://doi.org/10.1016/S0031-9422(98)00459-2 . [all data]

van den Dool and Kratz, 1963
van den Dool, H.; Kratz, P. Dec., A generalization of the retention index system including linear temperature programmed gas-liquid partition chromatography, J. Chromatogr., 1963, 11, 463-471, https://doi.org/10.1016/S0021-9673(01)80947-X . [all data]

Andriamaharavo, 2014
Andriamaharavo, N.R., Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2014. [all data]

Tret'yakov, 2008
Tret'yakov, K.V., Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2008. [all data]

Wirth, Guo, et al., 2001
Wirth, J.; Guo, W.; Baumes, R.; Günata, Z., Volatile compounds released by enzymatic hydrolysis of glycoconjugates of leaves and grape berries from Vitis vinifera muscat of Alexandria and Shiraz cultivars, J. Agric. Food Chem., 2001, 49, 6, 2917-2923, https://doi.org/10.1021/jf001398l . [all data]

Bureau, Baumes, et al., 2000
Bureau, S.M.; Baumes, R.L.; Razungles, A.J., Effects of vine or bunch shading on the glycosylated flavor precursors in grapes of Vitis vinifera L. Cv. Syrah, J. Agric. Food Chem., 2000, 48, 4, 1290-1297, https://doi.org/10.1021/jf990507x . [all data]

Bureau, Razungles, et al., 2000
Bureau, S.M.; Razungles, A.R.; Baumes, R.L., The aroma of Muscat of Frontignan grapes: effect of the light environment of vine or bunch on volatiles and glycoconjugates, J. Sci. Food Agric., 2000, 80, 14, 2012-2020, https://doi.org/10.1002/1097-0010(200011)80:14<2012::AID-JSFA738>3.0.CO;2-X . [all data]

Grung, Lichtenthaler, et al., 2007
Grung, M.; Lichtenthaler, R.; Ahel, M.; Tollefsen, K.-E.; Langford, K.; Thomas, K.V., Effects-directed analysis of organic toxicants in wastewater effluent from Zagreb, Croatia, Chemosphere, 2007, 67, 1, 108-120, https://doi.org/10.1016/j.chemosphere.2006.09.021 . [all data]

da Camara, Shepherd, et al., 2002
da Camara, C.A.G.; Shepherd, S.L.K.; Joaquim, D.R.G., Análise químnica da cultura de tecidos do híbrido Clusia paralicola X Clusia weddelliana, Revista Brasileira de Farmacognosia, 2002, 12, 26-28, https://doi.org/10.1590/S0102-695X2002000300013 . [all data]

Jayasekara, Stevenson, et al., 2002
Jayasekara, T.K.; Stevenson, P.C.; Belmain, S.R.; Farman, D.I.; Hall, D.R., Identification of methyl salicylate as the principal volatile component in the methanol extract of root bark of Securidaca longepedunculata Fers, J. Mass Spectrom., 2002, 37, 6, 577-580, https://doi.org/10.1002/jms.314 . [all data]

Waggott and Davies, 1984
Waggott, A.; Davies, I.W., Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]

Ardrey and Moffat, 1981
Ardrey, R.E.; Moffat, A.C., Gas-liquid chromatographic retention indices of 1318 substances of toxicological interest on SE-30 or OV-1 stationary phase, J. Chromatogr., 1981, 220, 3, 195-252, https://doi.org/10.1016/S0021-9673(00)81925-1 . [all data]

Parada and Duque, 1998
Parada, F.; Duque, C., Studies on the aroma of piñuela fruit pulp (Bromelia plumieri): Free and bound volatile composition and characterization of some glucoconjugates as aroma precursors, J. Hi. Res. Chromatogr., 1998, 21, 10, 577-581, https://doi.org/10.1002/(SICI)1521-4168(19981001)21:10<577::AID-JHRC577>3.0.CO;2-V . [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, Gas Chromatography, References

• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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