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4-Pyridoxic acid


2-Methyl-3-hydroxy-4-carboxy-5-hydroxymethylpyridine, 3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarboxylic acid
Empirical Formula (Hill Notation):
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Quality Level




258-261 °C (dec.) (lit.)

storage temp.


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4-Pyridoxic acid is a catabolite of vitamin B6. It has been used as a standard in the clinical spectrometric analysis of metabolites.


25 mg in glass insert
100 mg in poly bottle

Other Notes

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. P9630.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit


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Hazard Statements

Precautionary Statements

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids



Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Magdalena Jankowska et al.
Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation, 23(1), 57-64 (2012-03-27)
The study aimed to determine vitamin B6 status in elderly (age ≥ 60 years) and younger (age <60 years) recipients of allogeneic kidney graft and to investigate associations between vitamin B6 status and immunity markers. A retrospective observational study. The...
Elisabeth Fabian et al.
Annals of nutrition & metabolism, 52(1), 29-36 (2008-01-31)
In vitro studies indicate that yoghurt bacteria are able to generate several water-soluble vitamins and therefore yoghurt could be a good source of these micronutrients. However, whether lactobacilli or other viable bacteria release the synthesized vitamins or utilize vitamins from...
Kirstine S Krogholm et al.
The Journal of nutrition, 134(2), 445-451 (2004-01-30)
To gain better insight into the potential health effects of fruits and vegetables, reliable biomarkers of intake are needed. The main purpose of this study was to investigate the ability of flavonoid excretion in both 24-h and morning urine samples...
Ronita L Cromwell et al.
Medicine and science in sports and exercise, 50(9), 1909-1919 (2018-03-24)
The purpose of this article was to provide an overview of the National Aeronautics and Space Administration (NASA) 70-day Bed Rest Study. The integrated complement of investigations and the standardized bed rest environment that served as the platform for this...
Marwa Fouad Mansour et al.
Electrophoresis, 39(20), 2540-2549 (2018-04-21)
Since no proper method is available in literature for the analysis of pyridoxal-5'-phosphate, a reversed phase liquid chromatographic method was developed and validated for specificity, sensitivity, linearity, precision and accuracy. Nine potential related substances and forced degradation products could be...

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