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Heterocyclic building blocks

6-Hydroxynicotinamide

Also known as 1,6-Dihydro-6-oxo-3-pyridinecarboxamide, 6-oxo-1H-pyridine-3-carboxamide, 6-oxo-1,6-dihydropyridine-3-carboxamide

CAS 3670-59-5Formula C6H6N2O2Molar mass 138.13 g/molEC 808-793-2
GHS signal word: Warning. Pictograms: Harmful or irritant
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6-Hydroxynicotinamide chemical structure, C6H6N2O2, CAS 3670-59-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3670-59-5
Formula
C6H6N2O2
Molar mass
138.13 g/mol
EC number
808-793-2
HS code
293339
Category
Heterocyclic building blocks

What is 6-Hydroxynicotinamide?

Plain description, key identifiers and synonyms

6-Hydroxynicotinamide is a chemical substance with the molecular formula C6H6N2O2 and a molar mass of 138.13 g/mol. Its CAS registry number is 3670-59-5. The IUPAC name is 6-oxo-1H-pyridine-3-carboxamide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
6-oxo-1H-pyridine-3-carboxamide
CAS number
3670-59-5 CAS number cross-checked
EC number
808-793-2
Molecular formula
C6H6N2O2
MDL number
MFCD08691126
InChIKey
NGPNYDVHEUXWIA-UHFFFAOYSA-N
InChI
InChI=1S/C6H6N2O2/c7-6(10)4-1-2-5(9)8-3-4/h1-3H,(H2,7,10)(H,8,9)
SMILES (canonical and isomeric)
C1=CC(=O)NC=C1C(=O)N

Synonyms

  • 1,6-Dihydro-6-oxo-3-pyridinecarboxamide
  • 6-oxo-1H-pyridine-3-carboxamide
  • 6-oxo-1,6-dihydropyridine-3-carboxamide
  • 6-hydroxypyridine-3-carboxamide
  • 6-hydroxy-nicotinamide
  • Nicotinamide, 1,6-dihydro-6-oxo-
  • 3-Pyridinecarboxamide, 1,6-dihydro-6-oxo-
  • 3-Pyridinecarboxamide,
  • 2-pyridone-5-carboxamide
  • 6-Oxo-1,6-dihydro-3-pyridinecarboxamide #

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
138.13 g/molcalc.
Exact mass
138.0429 Dacalc.
LogP (octanol/water)
-0.53calc.
Topological polar surface area
75.95 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

  • H302Harmful if swallowed.
  • H319Causes serious eye irritation.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P330Rinse mouth.
  • P337 + P317If eye irritation persists: Get medical help.
  • 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

6-Hydroxynicotinamide suppliers

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6-Hydroxynicotinamide 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 6-Hydroxynicotinamide 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 6-Hydroxynicotinamide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 6-Hydroxynicotinamide, based on the data on this page

What is 6-Hydroxynicotinamide?

6-Hydroxynicotinamide is a chemical substance with the molecular formula C6H6N2O2 and a molar mass of 138.13 g/mol. Its CAS registry number is 3670-59-5. The IUPAC name is 6-oxo-1H-pyridine-3-carboxamide.

What is the CAS number of 6-Hydroxynicotinamide?

The CAS registry number of 6-Hydroxynicotinamide is 3670-59-5.

What is the molecular formula and weight of 6-Hydroxynicotinamide?

The molecular formula of 6-Hydroxynicotinamide is C6H6N2O2 and its molar mass is 138.13 g/mol.

What is 6-Hydroxynicotinamide used for?

Known uses and roles of 6-Hydroxynicotinamide include building blocks in research and laboratory and screening compounds in research and laboratory.

Is 6-Hydroxynicotinamide hazardous?

6-Hydroxynicotinamide carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 6-Hydroxynicotinamide?

6-Hydroxynicotinamide 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 6-Hydroxynicotinamide?

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What is the price of 6-Hydroxynicotinamide?

Suppliers quote 6-Hydroxynicotinamide 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 6-Hydroxynicotinamide

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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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