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Heterocyclic building blocks

2-Hydroxyisonicotinic acid

Also known as 2-oxo-1,2-dihydropyridine-4-carboxylic acid, 2-Hydroxy-4-pyridinecarboxylic acid, 2-Hydroxypyridine-4-carboxylic acid

CAS 22282-72-0Formula C6H5NO3Molar mass 139.11 g/molEC 835-024-8
GHS signal word: Warning. Pictograms: Harmful or irritant 4 suppliers listed
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2-Hydroxyisonicotinic acid chemical structure, C6H5NO3, CAS 22282-72-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
22282-72-0
Formula
C6H5NO3
Molar mass
139.11 g/mol
EC number
835-024-8
HS code
293339
Category
Heterocyclic building blocks

What is 2-Hydroxyisonicotinic acid?

Plain description, key identifiers and synonyms

2-Hydroxyisonicotinic acid is a chemical substance with the molecular formula C6H5NO3 and a molar mass of 139.11 g/mol. Its CAS registry number is 22282-72-0. The IUPAC name is 2-oxo-1H-pyridine-4-carboxylic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-oxo-1H-pyridine-4-carboxylic acid
CAS number
22282-72-0 CAS number cross-checked
EC numbers
835-024-8, 947-323-1
Molecular formula
C6H5NO3
MDL number
MFCD01318566
InChIKey
BXHCJLRTXPHUGH-UHFFFAOYSA-N
InChI
InChI=1S/C6H5NO3/c8-5-3-4(6(9)10)1-2-7-5/h1-3H,(H,7,8)(H,9,10)
SMILES (canonical and isomeric)
C1=CNC(=O)C=C1C(=O)O

Synonyms

  • 2-oxo-1,2-dihydropyridine-4-carboxylic acid
  • 2-Hydroxy-4-pyridinecarboxylic acid
  • 2-Hydroxypyridine-4-carboxylic acid
  • 2-Hydroxy-isonicotinic acid
  • 2-oxo-1H-pyridine-4-carboxylic acid
  • 4-Pyridinecarboxylic acid, 1,2-dihydro-2-oxo-
  • 2-Hydroxyisonicitonic Acid
  • 2-Hydroxyisonicotinic acid, AldrichCPR
  • 2-hydroxy isonicotinic acid
  • 4-Carboxy-2(1H)-pyridinone
  • 6-oxohydropyridine-4-carboxylic acid
  • 2-hydroxy-pyridine-4-carboxylic acid
  • 1,2-dihydro-2-oxo-4-pyridinecarboxylic acid
  • 2-Oxo-1,2-dihydro-4-pyridinecarboxylic acid
  • 1,2-Dihydro-2-oxopyridine-4-carboxylic acid
  • 1,2-dihydro-2-oxopyridine-4-carboxylic acid, AldrichCPR

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
139.11 g/molcalc.
Exact mass
139.0269 Dacalc.
LogP (octanol/water)
0.07calc.
Topological polar surface area
70.16 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1cccc[nH]1

O=c1cccc[nH]1

1 ring, 7 atoms, the 2-Pyridone ring system.

7,761 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

2-Hydroxyisonicotinic acid suppliers

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Where suppliers are based

4 suppliers in 2 countries

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2-Hydroxyisonicotinic acid price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 2-Hydroxyisonicotinic acid is traded under.

HS 2933.39Indicative HS code

Heterocyclic compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure…

World exports in 2024
$9.16B
−17.9% vs 2023, imports $10.6B
2019 to 2024
Top exporters
  1. China21.5%
  2. India * partner reported12.3%
  3. Ireland11.6%
Top importers
  1. Germany14.2%
  2. United States12.8%
  3. Brazil10.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 2-Hydroxyisonicotinic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 2-Hydroxyisonicotinic acid, based on the data on this page

What is 2-Hydroxyisonicotinic acid?

2-Hydroxyisonicotinic acid is a chemical substance with the molecular formula C6H5NO3 and a molar mass of 139.11 g/mol. Its CAS registry number is 22282-72-0. The IUPAC name is 2-oxo-1H-pyridine-4-carboxylic acid.

What is the CAS number of 2-Hydroxyisonicotinic acid?

The CAS registry number of 2-Hydroxyisonicotinic acid is 22282-72-0.

What is the molecular formula and weight of 2-Hydroxyisonicotinic acid?

The molecular formula of 2-Hydroxyisonicotinic acid is C6H5NO3 and its molar mass is 139.11 g/mol.

What is 2-Hydroxyisonicotinic acid used for?

Known uses and roles of 2-Hydroxyisonicotinic acid include building blocks in research and laboratory and screening compounds in research and laboratory.

Is 2-Hydroxyisonicotinic acid hazardous?

2-Hydroxyisonicotinic acid carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 2-Hydroxyisonicotinic acid?

2-Hydroxyisonicotinic acid is usually classified under HS code 293339 (Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 2-Hydroxyisonicotinic acid?

CompoundList lists 4 suppliers of 2-Hydroxyisonicotinic acid in China and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 2-Hydroxyisonicotinic acid?

Suppliers quote 2-Hydroxyisonicotinic acid on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 2-Hydroxyisonicotinic acid

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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