Methylparaben
- Formula: C8H8O3
- Molecular weight: 152.1473
- IUPAC Standard InChIKey: LXCFILQKKLGQFO-UHFFFAOYSA-N
- 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)
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Phase change data
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 398.4 | K | N/A | Manzo and Ahumanda, 1990 | Uncertainty assigned by TRC = 0.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 19.9 | kcal/mol | CGC | Temprado, Roux, et al., 2005 | AC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 23.6 ± 0.2 | kcal/mol | GS | Perlovich, Rodionov, et al., 2005 | Based on data from 303. to 327. K.; AC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
19.5 | 461. | A | Stephenson and Malanowski, 1987 | Based on data from 446. to 517. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
6.05 | 399.2 | Giordano, Bettini, et al., 1999 | AC |
5.810 | 398.5 | Manzo and Ahumada, 1990 | AC |
Reaction thermochemistry data
Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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 by: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C8H7O3- + =
By formula: C8H7O3- + H+ = C8H8O3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 337.1 ± 2.1 | kcal/mol | G+TS | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 330.3 ± 2.0 | kcal/mol | IMRE | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale |
Gas phase ion energetics data
Go To: Top, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 206.4 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 199.0 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
De-protonation reactions
C8H7O3- + =
By formula: C8H7O3- + H+ = C8H8O3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 337.1 ± 2.1 | kcal/mol | G+TS | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 330.3 ± 2.0 | kcal/mol | IMRE | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale; B |
IR Spectrum
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), UV/Visible spectrum, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
View spectrum image in SVG format.
Download spectrum in JCAMP-DX format.
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 |
Mass spectrum (electron ionization)
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, UV/Visible spectrum, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 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, 1990. |
NIST MS number | 118948 |
UV/Visible spectrum
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
View spectrum image in SVG format.
Download spectrum in JCAMP-DX format.
Source | Lang (editor), 1965 |
---|---|
Owner | INEP CP RAS, NIST OSRD Collection (C) 2007 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
Origin | INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS |
Source reference | RAS UV No. 19634 |
Instrument | Zeiss VSU-1 |
Melting point | 126-129 |
Gas Chromatography
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | OV-1 | 150. | 1410. | Fedoreev and Maksimov, 1977 | Gaschrom; Column length: 1.5 m |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Packed | SE-30 | 1419. | Ramsey, Lee, et al., 1980 | He, 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
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5MS | 1459. | Lalel, Singh, et al., 2003 | 60. m/0.25 mm/0.25 μm, He, 40. C @ 1. min, 3. K/min, 310. C @ 20. min |
Capillary | DB-5 | 1465. | da Silva, Borba, et al., 1999 | 30. m/0.25 mm/0.25 μm, H2, 4. K/min; Tstart: 50. C; Tend: 290. C |
Packed | SE-30 | 1435. | van den Dool and Kratz, 1963 | Celite; Tstart: 75. C; Tend: 228. C |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5MS | 1452. | Andriamaharavo, 2014 | 30. m/0.25 mm/0.25 μm, He; Program: 60C (1 min) => 5 C/min => 210C => 10 C/min => 280C (15 min) |
Capillary | VF-5MS | 1470.4 | Tret'yakov, 2008 | 30. 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
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 2932. | Wirth, Guo, et al., 2001 | 30. m/0.32 mm/0.5 μm, He, 60. C @ 3. min, 3. K/min, 245. C @ 20. min |
Capillary | DB-Wax | 2930. | Bureau, Baumes, et al., 2000 | 30. m/0.32 mm/0.5 μm, He, 60. C @ 3. min, 3. K/min, 245. C @ 20. min |
Capillary | DB-Wax | 2932. | Bureau, Razungles, et al., 2000 | 30. 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
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 1460. | Grung, Lichtenthaler, et al., 2007 | 30. m/0.25 mm/0.25 μm, 5. K/min, 280. C @ 10. min; Tstart: 40. C |
Capillary | DB-5 | 1475. | da Camara, Shepherd, et al., 2002 | 30. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 40. C; Tend: 290. C |
Capillary | CP Sil 5 CB | 1420. | Jayasekara, Stevenson, et al., 2002 | He, 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
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 1419. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 1435. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
Other | Methyl Silicone | 1419. | Ardrey and Moffat, 1981 | Program: not specified |
Normal alkane RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 2911. | Parada and Duque, 1998 | 30. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 4. K/min, 240. C @ 10. min |
Capillary | DB-Wax | 2925. | Parada and Duque, 1998 | 30. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 4. K/min, 240. C @ 10. min |
References
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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]
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]
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]
Lang (editor), 1965
Lang (editor), L.,
Absorption Spectra in the Ultraviolet and Visible Region, 1965, 5, 81. [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, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.