4-Pyridoxic acid
Also known as: 2-Methyl-3-hydroxy-4-carboxy-5-hydroxymethylpyridine, 3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarboxylic acid, 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinic acid, 2-Methyl-3-hydroxy-5-(hydroxymethyl)pyridine-4-carboxylic acid, 3-Hydroxy-5-hydroxymethyl-2-methyl-isonicotinic acid, Pyridoxic acid, 4-Pyridoxinecarboxylic acid, 4-Pyridoxinic acid, 4-Pyridoxylic acid, NSC 41814
4-Pyridoxic acid (CAS 82-82-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H9NO4 and a molecular weight of 183.16100 g/mol. Key properties include a melting point of 258-261ºC (dec.)(lit.), a boiling point of 584.5ºC at 760 mmHg, a density of 1.48g/cm3 and a flash point of 307.3ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 82-82-6
- Jingsj CID
- J-29129-2
- Molecular Formula
- C8H9NO4
- Molecular Weight
- 183.16100 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 258-261ºC (dec.)(lit.) |
|---|---|
| Boiling Point | 584.5ºC at 760 mmHg |
| Density | 1.48g/cm3 |
| Flash Point | 307.3ºC |
| Exact Mass | 183.05300 |
| PSA | 90.65000 |
| LogP | 0.28610 |
| Refractive Index | 1.637 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Sharma SK, et al. Determination of vitamin B6 vitamers and pyridoxic acid in biological samples. J Chromatogr. 1992 Jul 1;578(1):45-51. |
Customs & Trade Information
| HS Code | 2933399090 |
|---|---|
| Summary | 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 4-Pyridoxic acid?
The CAS number of 4-Pyridoxic acid is 82-82-6.
What are the molecular formula and molecular weight of 4-Pyridoxic acid?
4-Pyridoxic acid has molecular formula C8H9NO4 and molecular weight 183.16100 g/mol.
Is 4-Pyridoxic acid hazardous?
4-Pyridoxic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 4-Pyridoxic acid?
For 4-Pyridoxic acid, Upstream Products: Pyridoxal, Pyridoxine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Pyridoxic acid (CAS 82-82-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29129-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.