4-Ethylsyringol
Standard reference
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Int J Mol Sci.2023, 24(8):7442.
Pharmaceutics.2022, 14(5):945.
Plant Physiol.2023, 193(3):1758-1771.
Int J Mol Sci.2019, 20(16):E4015
Indian Journal of Science and Technology2023, 16(SP1):48-56.
Pharmaceutics.2021, 13(2):187.
J Appl Biol Chem2022, 65:343−348.
Int J Mol Sci.2018, 19(9):E2601
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Environ Res. 2001 Feb;85(2):145-58.
Measurement of urinary methoxyphenols and their use for biological monitoring of wood smoke exposure.[Pubmed:
11161664]
A urinary assay for methoxyphenols was developed for the biological monitoring of wood smoke exposure.
METHODS AND RESULTS:
Methoxyphenols in 10-ml samples of urine were extracted after acid hydrolysis using XAD in a solid-phase extraction cartridge. The methoxyphenols were eluted with ethyl acetate and then analyzed by gas chromatography/mass spectrometry. Specific chemicals quantified were guaiacol, 4-methylguaiacol, 4-ethylguaiacol, 4-propylguaiacol, syringol, 4-methylsyringol, 4-Ethylsyringol, vanillin, eugenol, and syringaldehyde. Recoveries ranged from 60 to 90%, with coefficients of variation of < or =20%. Background levels of the compounds were measured in 21 nonsmoking adults. Guaiacol, 4-methylguaiacol, eugenol, and vanillin were detected in all subjects. An experimental feeding of a commercial wood smoke flavoring demonstrated that methoxyphenols were rapidly and efficiently eliminated in urine.
CONCLUSIONS:
Preliminary field studies demonstrated that urinary excretion rates of some methoxyphenols increased after inhalation exposure to wood smoke.
Bioresour Technol. 2010 Jun;101(11):4056-61.
Determination of Eucalyptus spp lignin S/G ratio: a comparison between methods.[Pubmed:
20133130]
METHODS AND RESULTS:
The syringyl/guaiacyl ratio was determined for six different Eucalyptus spp. wood clones cultivated in four regions in Brazil. The determinants were made by pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) and the results were compared with those obtained by alkaline nitrobenzene oxidation method. The S/G ratios were obtained considering all the identified lignin derivatives in the pyrograms and also using two groups of markers. The first group of markers consisted of guaiacol, 4-methylguaiacol, 4-vinylguaiacol, trans-isoeugenol, syringol, 4-methylsyringol, 4-vinylsyringol and trans-4-propenylsyringol compounds as markers. The second group included guaiacol, 4-methylguaiacol, 4-vinylguaiacol, vanillin, 4-Ethylsyringol, 4-vinylsyringol, syringaldehyde, syringylacetone and trans-4-propenylsyringol.
CONCLUSIONS:
It was observed from the statistical analysis that the values of S/G obtained by Py-GC-MS using the two groups of markers did not differ significantly from those obtained by nitrobenzene oxidation method.
