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Heterocyclic building blocks

Hydroxytriazolopyrimidine

Also known as triazolopyrimidinol, 1,2,3-Triazolo(5',4'-4,5)pyrimidine, 2-hydroxy-

CAS 51141-43-6Formula C4H3N5OMolar mass 137.10 g/mol
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Hydroxytriazolopyrimidine chemical structure, C4H3N5O, CAS 51141-43-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
51141-43-6
Formula
C4H3N5O
Molar mass
137.10 g/mol
HS code
293359
Category
Heterocyclic building blocks

What is Hydroxytriazolopyrimidine?

Plain description, key identifiers and synonyms

Hydroxytriazolopyrimidine is a chemical substance with the molecular formula C4H3N5O and a molar mass of 137.10 g/mol. Its CAS registry number is 51141-43-6. The IUPAC name is 2,4-dihydrotriazolo[4,5-d]pyrimidin-5-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,4-dihydrotriazolo[4,5-d]pyrimidin-5-one
CAS number
51141-43-6
Molecular formula
C4H3N5O
InChIKey
ODPJQZNJZWLTJH-UHFFFAOYSA-N
InChI
InChI=1S/C4H3N5O/c10-4-5-1-2-3(6-4)8-9-7-2/h1H,(H2,5,6,7,8,9,10)
SMILES (canonical and isomeric)
C1=NC(=O)NC2=NNN=C21

Synonyms

  • triazolopyrimidinol
  • 1,2,3-Triazolo(5',4'-4,5)pyrimidine, 2-hydroxy-

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
137.10 g/molcalc.
Exact mass
137.0338 Dacalc.
LogP (octanol/water)
-0.96calc.
Topological polar surface area
87.32 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
Rings
2calc.
Aromatic rings
2calc.
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=c1ncc2n[nH]nc2[nH]1

O=c1ncc2n[nH]nc2[nH]1

2 rings, 10 atoms. This chemical is the scaffold itself.

1 other chemical 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.

Hydroxytriazolopyrimidine suppliers

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

Frequently asked questions

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

What is Hydroxytriazolopyrimidine?

Hydroxytriazolopyrimidine is a chemical substance with the molecular formula C4H3N5O and a molar mass of 137.10 g/mol. Its CAS registry number is 51141-43-6. The IUPAC name is 2,4-dihydrotriazolo[4,5-d]pyrimidin-5-one.

What is the CAS number of Hydroxytriazolopyrimidine?

The CAS registry number of Hydroxytriazolopyrimidine is 51141-43-6.

What is the molecular formula and weight of Hydroxytriazolopyrimidine?

The molecular formula of Hydroxytriazolopyrimidine is C4H3N5O and its molar mass is 137.10 g/mol.

What is Hydroxytriazolopyrimidine used for?

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

Is Hydroxytriazolopyrimidine hazardous?

No GHS hazard classification for Hydroxytriazolopyrimidine 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 Hydroxytriazolopyrimidine?

Hydroxytriazolopyrimidine 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 Hydroxytriazolopyrimidine?

Post a free request on CompoundList and suppliers of Hydroxytriazolopyrimidine will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Hydroxytriazolopyrimidine?

Suppliers quote Hydroxytriazolopyrimidine 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 Hydroxytriazolopyrimidine

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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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