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Impurities and reference standards

Pyrimidine

Also known as 1,3-Diazine, Metadiazine, m-Diazine

CAS 289-95-2Formula C4H4N2Molar mass 80.09 g/molEC 206-026-0
GHS signal word: Danger. Pictograms: Flammable, Corrosive 84 suppliers listed
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Pyrimidine chemical structure, C4H4N2, CAS 289-95-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
289-95-2
Formula
C4H4N2
Molar mass
80.09 g/mol
Physical form
Liquid
HS code
293359
Category
Impurities and reference standards
Illustrative photo, closed amber glass reagent bottles on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Pyrimidine?

Plain description, key identifiers and synonyms

Pyrimidine is the parent compound of the pyrimidines, a diazine having the two nitrogens at the 1- and 3-positions. It has a role as a Daphnia magna metabolite. It is a diazine and a member of pyrimidines.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
pyrimidine
CAS number
289-95-2 CAS number cross-checkedOther or deprecated CAS: 25247-63-6
EC number
206-026-0
Molecular formula
C4H4N2
UNII
K8CXK5Q32L
MDL number
MFCD00006059
InChIKey
CZPWVGJYEJSRLH-UHFFFAOYSA-N
InChI
InChI=1S/C4H4N2/c1-2-5-4-6-3-1/h1-4H
SMILES (canonical and isomeric)
C1=CN=CN=C1

Synonyms

  • 1,3-Diazine
  • Metadiazine
  • m-Diazine
  • Miazine
  • Pyrimidine base
  • 1,3-Diazin
  • 1,3-Diazabenzene
  • pyrimidine phase I
  • pyrimidine phase II
  • pyrimidine phase IV
  • Pyrimidine, dimer
  • 2,4-Dideoxyuracil
  • pyrimidin
  • 13-Diazabenzene
  • 1,3-Diazabenzene, 1,3-Diazine, Metadiazine, Miazine, NSC 89305, m-Diazine
  • Pyrimidine free base
  • Buspirone Impurity 39
  • Pyrimidine, >=98.0%
  • Pyrimidine Solution in Methanol, 5000ug/mL

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

Physical form
Liquidexp.

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
80.09 g/molcalc.
Exact mass
80.0374 Dacalc.
LogP (octanol/water)
0.48calc.
Topological polar surface area
25.78 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
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, c1cncnc1

c1cncnc1

1 ring, 6 atoms. This chemical is the scaffold itself.

18,999 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive

Hazard statements

  • H226Flammable liquid and vapour.
  • H318Causes serious eye damage.
Precautionary statements (14)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • 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

Pyrimidine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 84 suppliers
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Where suppliers are based

84 suppliers in 14 countries

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Pyrimidine 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

Industrial uses: Intermediate.

Roles

  • Daphnia magna metabolite
  • Daphnia metabolite
  • animal metabolite
  • antineoplastic agent
  • crustacean metabolite
  • eukaryotic metabolite
  • metabolite
  • pharmaceutical

Pharmacology

Pyrimidine is one of two classes of heterocyclic nitrogenous bases found in the nucleic acids DNA and RNA: in DNA the pyrimidines are cytosine and thymine, in RNA uracil replaces thymine.

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

Frequently asked questions

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

What is Pyrimidine?

Pyrimidine is the parent compound of the pyrimidines, a diazine having the two nitrogens at the 1- and 3-positions. It has a role as a Daphnia magna metabolite. It is a diazine and a member of pyrimidines.

What is the CAS number of Pyrimidine?

The CAS registry number of Pyrimidine is 289-95-2. Other or deprecated CAS numbers: 25247-63-6.

What is the molecular formula and weight of Pyrimidine?

The molecular formula of Pyrimidine is C4H4N2 and its molar mass is 80.09 g/mol.

What is Pyrimidine used for?

Industrial uses: Intermediate.

Is Pyrimidine hazardous?

Pyrimidine carries the GHS signal word "Danger". Main hazards: flammable liquid and vapour, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pyrimidine?

Pyrimidine 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 Pyrimidine?

CompoundList lists 84 suppliers of Pyrimidine in China, United States, Germany, Spain and 10 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Pyrimidine?

Suppliers quote Pyrimidine 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 Pyrimidine

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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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