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Heterocyclic building blocks

Comanic acid

Also known as 4-Oxo-4H-pyran-2-carboxylic Acid, 4-Oxopyran-2-carboxylic acid, 4H-Pyran-2-carboxylic acid, 4-oxo-

CAS 499-05-8Formula C6H4O4Molar mass 140.09 g/molEC 679-617-8
GHS signal word: Warning. Pictograms: Harmful or irritant
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Comanic acid chemical structure, C6H4O4, CAS 499-05-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
499-05-8
Formula
C6H4O4
Molar mass
140.09 g/mol
EC number
679-617-8
HS code
293299
Category
Heterocyclic building blocks

What is Comanic acid?

Plain description, key identifiers and synonyms

Comanic acid is a chemical substance with the molecular formula C6H4O4 and a molar mass of 140.09 g/mol. Its CAS registry number is 499-05-8. The IUPAC name is 4-oxopyran-2-carboxylic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-oxopyran-2-carboxylic acid
CAS number
499-05-8 CAS number cross-checked
EC number
679-617-8
Molecular formula
C6H4O4
UNII
FEF84NM2E9
MDL number
MFCD00059958
InChIKey
UFMDRPPBUAPWBK-UHFFFAOYSA-N
InChI
InChI=1S/C6H4O4/c7-4-1-2-10-5(3-4)6(8)9/h1-3H,(H,8,9)
SMILES (canonical and isomeric)
C1=COC(=CC1=O)C(=O)O

Synonyms

  • 4-Oxo-4H-pyran-2-carboxylic Acid
  • 4-Oxopyran-2-carboxylic acid
  • 4H-Pyran-2-carboxylic acid, 4-oxo-
  • gamma-Pyrone-2-carboxylic Acid
  • Comanicacid
  • Ufmdrppbuapwbk-uhfffaoy
  • 4-Oxo-4H-pyran-2-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
140.09 g/molcalc.
Exact mass
140.011 Dacalc.
LogP (octanol/water)
0.34calc.
Topological polar surface area
67.51 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
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=c1ccocc1

O=c1ccocc1

1 ring, 7 atoms, the 4H-Pyran-4-one ring system.

339 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.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • 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.

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

Comanic acid suppliers

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Comanic 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 Comanic acid is traded under.

HS 2932.99Indicative HS code

Heterocyclic compounds with oxygen hetero-atom(s) only, other

World exports in 2024
$3.81B
+10.3% vs 2023, imports $7.05B
2019 to 2024
Top exporters
  1. China28.9%
  2. Switzerland * partner reported12.7%
  3. Germany7.8%
Top importers
  1. United States49.7%
  2. China11.9%
  3. India * partner reported3.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Comanic acid, based on the data on this page

What is Comanic acid?

Comanic acid is a chemical substance with the molecular formula C6H4O4 and a molar mass of 140.09 g/mol. Its CAS registry number is 499-05-8. The IUPAC name is 4-oxopyran-2-carboxylic acid.

What is the CAS number of Comanic acid?

The CAS registry number of Comanic acid is 499-05-8.

What is the molecular formula and weight of Comanic acid?

The molecular formula of Comanic acid is C6H4O4 and its molar mass is 140.09 g/mol.

What is Comanic acid used for?

Known uses and roles of Comanic acid include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Comanic acid hazardous?

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

What is the HS code of Comanic acid?

Comanic acid is usually classified under HS code 293299 (Heterocyclic compounds with oxygen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Comanic acid?

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What is the price of Comanic acid?

Suppliers quote Comanic 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 Comanic 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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