Heneicosanoic acid, methyl ester

Formula: C₂₂H₄₄O₂
Molecular weight: 340.5836
IUPAC Standard InChI: InChI=1S/C22H44O2/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22(23)24-2/h3-21H2,1-2H3
IUPAC Standard InChIKey: AJRICDSAJQHDSD-UHFFFAOYSA-N
CAS Registry Number: 6064-90-0
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: Methyl heneicosanoate; Methyl henicosanoate; 21:0 Me ester; Methyl heneicosanoate (C-21); methyl henicosaneate
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- Phase change data
- Mass spectrum (electron ionization)
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Gas Chromatography

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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
Capillary	CP Sil 5 CB	240.	2410.	Hanai and Hong, 1989	30. m/0.25 mm/0.25 μm
Packed	SE-30	200.	2415.	Golovnya and Kuzmenko, 1977	He, Chromosorb W (80-100 mesh); Column length: 1.5 m
Packed	SE-30	200.	2414.	Golovnya, Uralets, et al., 1976	Gas Chrom Q (80-100 mesh); Column length: 1.5 m

Kovats' RI, polar column, isothermal

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Column type	Active phase	Temperature (C)	I	Reference	Comment
Capillary	CP-Wax	240.	2716.	Hanai and Hong, 1989	25. m/0.25 mm/0.22 μm
Capillary	DB-Wax	240.	2748.	Hanai and Hong, 1989	25. m/0.25 mm/0.22 μm

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

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Column type	Active phase	I	Reference	Comment
Capillary	DB-1	2410.	Johnson, Urso, et al., 1997	30. m/0.2 mm/0.25 μm, 50. C @ 2. min, 5. K/min, 300. C @ 5. min
Capillary	DB-5	2430.	Rostad and Pereira, 1986	30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min

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

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Column type	Active phase	I	Reference	Comment
Capillary	VF-5MS	2428.8	Tret'yakov, 2007	30. m/0.25 mm/0.25 μm, He; Program: Multi-step temperature program; T(initial)=60C; T(final)=270C

Normal alkane RI, non-polar column, temperature ramp

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Column type	Active phase	I	Reference	Comment
Capillary	HP-5 MS	2430.	Vedernikov, Shabanova, et al., 2011	30. m/0.25 mm/0.25 μm, Helium, 5. K/min, 280. C @ 5. min; T_start: 150. C
Capillary	Ultra-1	2409.	Okumura, 1991	25. m/0.32 mm/0.25 μm, He, 3. K/min; T_start: 80. C; T_end: 260. C

Lee's RI, non-polar column, temperature ramp

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Column type	Active phase	I	Reference	Comment
Capillary	DB-1	404.8	Johnson, Urso, et al., 1997	30. m/0.2 mm/0.25 μm, 50. C @ 2. min, 5. K/min, 300. C @ 5. min
Capillary	DB-5	391.75	Rostad and Pereira, 1986	30. m/0.26 mm/0.25 μm, He, 50. C @ 4. min, 6. K/min, 300. C @ 20. min

References

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Hanai and Hong, 1989
Hanai, T.; Hong, C., Structure-retention correlation in CGC, J. Hi. Res. Chromatogr., 1989, 12, 5, 327-332, https://doi.org/10.1002/jhrc.1240120517 . [all data]

Golovnya and Kuzmenko, 1977
Golovnya, R.V.; Kuzmenko, T.E., Thermodynamic evaluation of the interaction of fatty acid methyl esters with polar and non-polar stationary phases, based on their retention indices, Chromatographia, 1977, 10, 9, 545-548, https://doi.org/10.1007/BF02262915 . [all data]

Golovnya, Uralets, et al., 1976
Golovnya, R.V.; Uralets, V.P.; Kuzmenko, T.E., Characterization of fatty acid methyl esters by gas chromatography on siloxane liquid phases, J. Chromatogr., 1976, 121, 1, 118-121, https://doi.org/10.1016/S0021-9673(00)82312-2 . [all data]

Johnson, Urso, et al., 1997
Johnson, C.I.; Urso, A.; Geleta, L., Broad spectrum analysis of municipal and industrial effluents discharged into the Peace, Athabasca and Slave river basins: characterization of effluent samples, 1994 - Volume 1 of 2, Northern River Basins Study Project Report No. 121, Norther River Basins Study, Edmonton, Alberta, 1997, 27. [all data]

Rostad and Pereira, 1986
Rostad, C.E.; Pereira, W.E., Kovats and Lee retention indices determined by gas chromatography/mass spectrometry for organic compounds of environmental interest, J. Hi. Res. Chromatogr. Chromatogr. Comm., 1986, 9, 6, 328-334, https://doi.org/10.1002/jhrc.1240090603 . [all data]

Tret'yakov, 2007
Tret'yakov, K.V., Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2007. [all data]

Vedernikov, Shabanova, et al., 2011
Vedernikov, D.N.; Shabanova, N.Yu.; Roshchin, V.I., Change in the chemical composition of the crust and inner bark of the Betula pendula Roth. Birch (Betulaceae) with tree height, Rus. J. Bioorg. Chem., 2011, 37, 7, 877-882, https://doi.org/10.1134/S1068162011070259 . [all data]

Okumura, 1991
Okumura, T., retention indices of environmental chemicals on methyl silicone capillary column, Journal of Environmental Chemistry (Japan), 1991, 1, 2, 333-358, https://doi.org/10.5985/jec.1.333 . [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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