6-Hydroxynicotinic acid
Also known as: 2-Hydroxy-5-pyridinecarboxylic acid, 2-Hydroxypyridine-5-carboxylic acid, 6-Oxonicotinic acid, 1,6-Dihydro-6-oxo-3-pyridinecarboxylic acid, 1,6-Dihydro-6-oxo-nicotinic acid, 5-Carboxy-2-pyridone, 5-Carboxy-2(1H)-pyridinone, 6-Hydroxy-3-pyridinecarboxylic acid, 6-Hydroxyniacin, 6-Oxo-1,6-dihydro-3-pyridinecarboxylic acid, 6-Hydroxypyridine-3-carboxylic acid
6-Hydroxynicotinic acid (CAS 5006-66-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H5NO3 and a molecular weight of 139.109 g/mol. Key properties include a melting point of >300 °C(lit.), a boiling point of 488.8±30.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 249.4±24.6 °C. 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 Nov 3, 2026.
- CAS No.
- 5006-66-6
- Jingsj CID
- J-1517117-2
- Molecular Formula
- C6H5NO3
- Molecular Weight
- 139.109 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Boiling Point | 488.8±30.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 249.4±24.6 °C |
| Exact Mass | 139.026947 |
| PSA | 70.16000 |
| LogP | -0.96 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.626 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
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 6-Hydroxynicotinic acid?
The CAS number of 6-Hydroxynicotinic acid is 5006-66-6.
What are the molecular formula and molecular weight of 6-Hydroxynicotinic acid?
6-Hydroxynicotinic acid has molecular formula C6H5NO3 and molecular weight 139.109 g/mol.
Is 6-Hydroxynicotinic acid hazardous?
6-Hydroxynicotinic 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 6-Hydroxynicotinic acid?
For 6-Hydroxynicotinic acid, Upstream Products: Triethylamine, Methyl 6-methoxynicotinate, 2(1H)-Pyridone; Downstream Products: 6-Aminonicotinic acid, Methyl 5-bromo-6-hydroxynicotinate, Methyl 5,6-dichloronicotinate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "6-Hydroxynicotinic acid (CAS 5006-66-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1517117-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.