Methylparaben

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Reaction thermochemistry data

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

Data compiled by: John E. Bartmess

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Individual Reactions

C8H7O3- + Hydrogen cation = Methylparaben

By formula: C8H7O3- + H+ = C8H8O3

Quantity Value Units Method Reference Comment
Δr337.1 ± 2.1kcal/molG+TSFujio, McIver, et al., 1981gas phase; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Δr330.3 ± 2.0kcal/molIMREFujio, McIver, et al., 1981gas phase; value altered from reference due to change in acidity scale

IR Spectrum

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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

Gas Phase Spectrum

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IR spectrum
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Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin NIST Mass Spectrometry Data Center
State gas
Instrument HP-GC/MS/IRD

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


Gas Chromatography

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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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Column type Active phase Temperature (C) I Reference Comment
PackedOV-1150.1410.Fedoreev and Maksimov, 1977Gaschrom; Column length: 1.5 m

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

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Column type Active phase I Reference Comment
PackedSE-301419.Ramsey, Lee, et al., 1980He, Chromosorb G HP (80-100 mesh); Column length: 1.5 m; Program: not specified

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

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Column type Active phase I Reference Comment
CapillaryHP-5MS1459.Lalel, Singh, et al., 200360. m/0.25 mm/0.25 μm, He, 40. C @ 1. min, 3. K/min, 310. C @ 20. min
CapillaryDB-51465.da Silva, Borba, et al., 199930. m/0.25 mm/0.25 μm, H2, 4. K/min; Tstart: 50. C; Tend: 290. C
PackedSE-301435.van den Dool and Kratz, 1963Celite; Tstart: 75. C; Tend: 228. C

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

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Column type Active phase I Reference Comment
CapillaryHP-5MS1452.Andriamaharavo, 201430. m/0.25 mm/0.25 μm, He; Program: 60C (1 min) => 5 C/min => 210C => 10 C/min => 280C (15 min)
CapillaryVF-5MS1470.4Tret'yakov, 200830. m/0.25 mm/0.25 μm, He; Program: Multi-step temperature program; T(initial)=60C; T(final)=270C

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

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Column type Active phase I Reference Comment
CapillaryDB-Wax2932.Wirth, Guo, et al., 200130. m/0.32 mm/0.5 μm, He, 60. C @ 3. min, 3. K/min, 245. C @ 20. min
CapillaryDB-Wax2930.Bureau, Baumes, et al., 200030. m/0.32 mm/0.5 μm, He, 60. C @ 3. min, 3. K/min, 245. C @ 20. min
CapillaryDB-Wax2932.Bureau, Razungles, et al., 200030. m/0.32 mm/0.5 μm, 60. C @ 3. min, 3. K/min, 245. C @ 20. min

Normal alkane RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryDB-51460.Grung, Lichtenthaler, et al., 200730. m/0.25 mm/0.25 μm, 5. K/min, 280. C @ 10. min; Tstart: 40. C
CapillaryDB-51475.da Camara, Shepherd, et al., 200230. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 40. C; Tend: 290. C
CapillaryCP Sil 5 CB1420.Jayasekara, Stevenson, et al., 2002He, 60. C @ 2. min, 6. K/min; Column length: 25. m; Column diameter: 0.25 mm; Tend: 230. C

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

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Column type Active phase I Reference Comment
CapillaryOV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc.1419.Waggott and Davies, 1984Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified
CapillaryOV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc.1435.Waggott and Davies, 1984Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified
OtherMethyl Silicone1419.Ardrey and Moffat, 1981Program: not specified

Normal alkane RI, polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryDB-Wax2911.Parada and Duque, 199830. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 4. K/min, 240. C @ 10. min
CapillaryDB-Wax2925.Parada and Duque, 199830. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 4. K/min, 240. C @ 10. min

References

Go To: Top, Reaction thermochemistry data, IR Spectrum, Gas Chromatography, Notes

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

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, Reaction thermochemistry data, IR Spectrum, Gas Chromatography, References