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Nucleosides and nucleotides

Violuric acid

Also known as 5-Hydroxyiminobarbituric acid, Alloxan 5-oxime, 5-Isonitrosobarbituric acid

CAS 87-39-8Formula C4H3N3O4Molar mass 157.09 g/molEC 201-741-4
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Violuric acid chemical structure, C4H3N3O4, CAS 87-39-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
87-39-8
Formula
C4H3N3O4
Molar mass
157.09 g/mol
EC number
201-741-4
HS code
293359
Category
Nucleosides and nucleotides

What is Violuric acid?

Plain description, key identifiers and synonyms

Violuric acid is a chemical substance with the molecular formula C4H3N3O4 and a molar mass of 157.09 g/mol. Its CAS registry number is 87-39-8. The IUPAC name is 6-hydroxy-5-nitroso-1H-pyrimidine-2,4-dione.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
6-hydroxy-5-nitroso-1H-pyrimidine-2,4-dione
CAS number
87-39-8 CAS number cross-checked
EC number
201-741-4
Molecular formula
C4H3N3O4
UNII
05RFR8AC84
MDL number
MFCD00006032
InChIKey
HRRVLSKRYVIEPR-UHFFFAOYSA-N
InChI
InChI=1S/C4H3N3O4/c8-2-1(7-11)3(9)6-4(10)5-2/h(H3,5,6,8,9,10)
SMILES (canonical and isomeric)
C1(=C(NC(=O)NC1=O)O)N=O

Synonyms

  • 5-Hydroxyiminobarbituric acid
  • Alloxan 5-oxime
  • 5-Isonitrosobarbituric acid
  • 5-(Hydroxyimino)pyrimidine-2,4,6(1H,3H,5H)-trione
  • 2,4,5,6(1H,3H)-Pyrimidinetetrone, 5-oxime
  • Alloxan-5-oxime
  • Alloxan, 5-oxime
  • 5-Nitrosopyrimidine-2,4,6-triol
  • 5-(hydroxyimino)-1,3-diazinane-2,4,6-trione
  • 5-(Hydroxyimino)barbituric acid
  • 6-hydroxy-5-nitroso-1H-pyrimidine-2,4-dione
  • 5-hydroxyiminohexahydropyrimidine-2,4,6-trione
  • (5E)-2,6-dihydroxy-5-(hydroxyimino)pyrimidin-4(5H)-one
  • 2,4,5,6(1H,3H)-Pyrimidinetetrone 5-oxime
  • 5-Isonitrosobarbituic acid
  • 2,5,6(1H,3H)-Pyrimidinetetrone, 5-oxime
  • 5-(hydroxyimino)-1,3-dihydropyrimidine-2,4,6-trione
  • pyrimidine-2,4,6(1H,3H,5H)-trione, 5-hydroxyimino-

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
157.09 g/molcalc.
Exact mass
157.0124 Dacalc.
LogP (octanol/water)
-0.83calc.
Topological polar surface area
115.4 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
1calc.
Heavy atoms
11calc.
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=c1cc[nH]c(=O)[nH]1

O=c1cc[nH]c(=O)[nH]1

1 ring, 8 atoms, the Uracil ring system.

2,933 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Violuric acid suppliers

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Where suppliers are based

1 supplier in 1 country

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Violuric acid price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Violuric acid is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Violuric acid?

Violuric acid is a chemical substance with the molecular formula C4H3N3O4 and a molar mass of 157.09 g/mol. Its CAS registry number is 87-39-8. The IUPAC name is 6-hydroxy-5-nitroso-1H-pyrimidine-2,4-dione.

What is the CAS number of Violuric acid?

The CAS registry number of Violuric acid is 87-39-8.

What is the molecular formula and weight of Violuric acid?

The molecular formula of Violuric acid is C4H3N3O4 and its molar mass is 157.09 g/mol.

Is Violuric acid hazardous?

No GHS hazard classification for Violuric acid is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Violuric acid?

Violuric acid is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Violuric acid?

CompoundList lists 1 supplier of Violuric acid in Hong Kong. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Violuric acid?

Suppliers quote Violuric 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 Violuric 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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