6 hydroxy 2 5 7 8 tetramethychroman 2 carboxylicacid

Manufactured by Merck Group

Sourced in United States

6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid is a chemical compound. It is a type of chroman derivative.

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3 protocols using 6 hydroxy 2 5 7 8 tetramethychroman 2 carboxylicacid

Chromatographic Analysis of Antioxidant Compounds

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Chromatographic-grade methanol
and ethanol were used for HPLC analyses (VWR, Austria). Ammonium acetate,
copper(II) chloride, glacial acetic acid, sodium acetate trihydrate,
ferric chloride hexahydrate, quercetin, 6-hydroxy-2,5,7,8-tetramethychroman-2-carboxylic
acid (Trolox), and reagents 2,2-diphenyl-1-picrylhydrazyl (DPPH),
2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS),
neocuproine (2,9-dimethyl-1,10-phenanthroline), and 2,4,6-tripyridyl-s-triazine (TPTZ) were purchased from Sigma-Aldrich.

Mollova S., Dzhurmanski A., Fidan H., Bojilov D., Manolov S., Dincheva I., Stankov S., Stoyanova A., Ercisli S., Assouguem A., Marc R.A., Ullah R, & Bari A. (2023). Chemical Composition of Essential Oils from Nepeta transcaucasica Grossh. and Nepeta cataria L. Cultivated in Bulgaria and Their Antimicrobial and Antioxidant Activity. ACS Omega, 8(17), 15441-15449.

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Defatting and Antioxidant Evaluation of Rice Bran

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Kum Doi Saket rice bran was purchased from a local grinding mill company (Organic Germinated Brown Rice Community Enterprise, Chiang Mai, Thailand) and defatted using hexane^{7 ,8 (link)}. Chemicals used in the experiments, including 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH), 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS), 2,4,6-tripyridyl-s-triazine (TPTZ), 6-hydroxy-2,5,7,8-tetramethychroman-2-carboxylic acid (Trolox), sulfur trioxide–trimethylamine (STMA), anhydrous dimethyl sulfoxide (DMSO), D-glucose and ascorbic acid (vitamin C), were purchased from Sigma-Aldrich Co. Ltd. (St. Louis, MO, USA). Other reagents in this experiment were analytical grade purchased from Union Science Co., Ltd. (Chiang Mai, Thailand).

Surin S., You S., Seesuriyachan P., Muangrat R., Wangtueai S., Jambrak A.R., Phongthai S., Jantanasakulwong K., Chaiyaso T, & Phimolsiripol Y. (2020). Optimization of ultrasonic-assisted extraction of polysaccharides from purple glutinous rice bran (Oryza sativa L.) and their antioxidant activities. Scientific Reports, 10, 10410.

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Antioxidant Compound Characterization

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DPPH, ABTS, 2,4,6-tri(2-pyridyl)-s-triazine (TPTZ), 3,3′,5,5′-tetramethyl-benzidine (TMB), 6-hydroxy-2,5,7,8-tetramethy-chroman-2-carboxylic acid (Trolox), acetic acid, aluminum nitrate, (+)-catechin, ferric chloride, Folin-Ciocalteau reagent, potassium persulfate, quercetin, silibinin, silymarin, sodium carbonate, sodium hydroxide, sodium hypochlorite, sodium molybdate, and sodium nitrate were purchased from Sigma-Aldrich (St. Louis, MO, USA). Apigenin, diosmetin, and verbascoside were purchased from Extrasynthese (Genay, France). Isosilibin, silicristin, and silydianin were purchased from SunHank Technology Co., Ltd. (Tainan, Taiwan). Hydrogen chloride, HPLC-grade methanol, and o-phosphoric acid were purchased from Merck (Darmstadt, Germany).

Zhao Z.W., Chang H.C., Ching H., Lien J.C., Huang H.C, & Wu C.R. (2021). Antioxidant Effects and Phytochemical Properties of Seven Taiwanese Cirsium Species Extracts. Molecules, 26(13), 3935.

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