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Heterocyclic building blocks

Uramil

Also known as 5-Aminobarbituric acid, Murexan, Dialuramide

CAS 118-78-5Formula C4H5N3O3Molar mass 143.10 g/molEC 204-277-0
GHS signal word: Warning. Pictograms: Harmful or irritant 1 supplier listed
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Uramil chemical structure, C4H5N3O3, CAS 118-78-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
118-78-5
Formula
C4H5N3O3
Molar mass
143.10 g/mol
EC number
204-277-0
HS code
293359
Category
Heterocyclic building blocks

What is Uramil?

Plain description, key identifiers and synonyms

Uramil is a chemical substance with the molecular formula C4H5N3O3 and a molar mass of 143.10 g/mol. Its CAS registry number is 118-78-5. The IUPAC name is 5-amino-1,3-diazinane-2,4,6-trione.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-amino-1,3-diazinane-2,4,6-trione
CAS number
118-78-5 CAS number cross-checked
EC number
204-277-0
Molecular formula
C4H5N3O3
UNII
3QDD44YV7R
MDL number
MFCD00023873
InChIKey
PSQZLWHRJMYZHD-UHFFFAOYSA-N
InChI
InChI=1S/C4H5N3O3/c5-1-2(8)6-4(10)7-3(1)9/h1H,5H2,(H2,6,7,8,9,10)
SMILES (canonical and isomeric)
C1(C(=O)NC(=O)NC1=O)N

Synonyms

  • 5-Aminobarbituric acid
  • Murexan
  • Dialuramide
  • 5-Amino-2,4,6-trihydroxypyrimidine
  • Barbituric acid, 5-amino-
  • 5-Amino-2,4,6-pyrimidinetriol
  • 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-amino-
  • Aminobarbituric acid
  • 2,4,6-Pyrimidinetriol, 5-amino-
  • 5-Amino-6-hydroxy-2,4(1H,3H)-pyrimidinedione
  • Barbituric acid, 5-amino-(8CI)
  • 5-Aminopyrimidine-2,4,6(1H,3H,5H)-trione
  • 5-amino-1,3-diazinane-2,4,6-trione
  • 5-aminohexahydropyrimidine-2,4,6-trione
  • 5-Amino-2,4,6(1H,3H,5H)-pyrimidinetrione
  • 5-Amino-2,6-pyrimidinetriol
  • 2,6(1H,3H,5H)-Pyrimidinetrione, 5-amino-
  • 5-Aminopyrimidine-2,4,6(1H,3H,5H)-trione(Uramil)

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
143.10 g/molcalc.
Exact mass
143.0331 Dacalc.
LogP (octanol/water)
-2.32calc.
Topological polar surface area
101.3 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.25calc.
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(=O)NC(=O)N1

O=C1CC(=O)NC(=O)N1

1 ring, 9 atoms, the Barbituric acid ring system.

747 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

Uramil suppliers

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Where suppliers are based

1 supplier in 1 country

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Uramil price

Indicative price range per kg from live supplier offers

No published prices right now

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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

United States

  • TSCA inventory (USA)
    Status: Inactive 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 Uramil 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 Uramil is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Uramil, based on the data on this page

What is Uramil?

Uramil is a chemical substance with the molecular formula C4H5N3O3 and a molar mass of 143.10 g/mol. Its CAS registry number is 118-78-5. The IUPAC name is 5-amino-1,3-diazinane-2,4,6-trione.

What is the CAS number of Uramil?

The CAS registry number of Uramil is 118-78-5.

What is the molecular formula and weight of Uramil?

The molecular formula of Uramil is C4H5N3O3 and its molar mass is 143.10 g/mol.

What is Uramil used for?

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

Is Uramil hazardous?

Uramil 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 Uramil?

Uramil 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 Uramil?

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

What is the price of Uramil?

Suppliers quote Uramil 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 Uramil

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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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