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Heterocyclic building blocks

Pterin

Also known as 2-Amino-4-hydroxypteridine, Pteridoxamine, 4-Oxopterin

CAS 2236-60-4Formula C6H5N5OMolar mass 163.14 g/molEC 218-799-1
GHS signal word: Warning. Pictograms: Harmful or irritant 22 suppliers listed
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Pterin chemical structure, C6H5N5O, CAS 2236-60-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2236-60-4
Formula
C6H5N5O
Molar mass
163.14 g/mol
EC number
218-799-1
HS code
293359
Category
Heterocyclic building blocks

What is Pterin?

Plain description, key identifiers and synonyms

2-aminopteridin-4-ol is a 2-amino-4-hydroxypteridine. It is a tautomer of a 2-aminopteridin-4(1H)-one and a 2-aminopteridin-4(3H)-one.

Pterin is a substituted bicyclic heterocyclic compound derived from pteridine.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-amino-3H-pteridin-4-one
CAS number
2236-60-4 CAS number cross-checkedOther or deprecated CAS: 938-42-1
EC number
218-799-1
Molecular formula
C6H5N5O
UNII
85MA24E1NH
MDL number
MFCD01456481
InChIKey
HNXQXTQTPAJEJL-UHFFFAOYSA-N
InChI
InChI=1S/C6H5N5O/c7-6-10-4-3(5(12)11-6)8-1-2-9-4/h1-2H,(H3,7,9,10,11,12)
SMILES (canonical and isomeric)
C1=CN=C2C(=N1)C(=O)NC(=N2)N

Synonyms

  • 2-Amino-4-hydroxypteridine
  • Pteridoxamine
  • 4-Oxopterin
  • 2-Amino-4-pteridone
  • 2-Amino-4(1H)-pteridinone
  • 2-amino-3H-pteridin-4-one
  • 2-amino-3,4-dihydropteridin-4-one
  • Pterine
  • 2-aminopteridin-4-ol
  • 2-aminopteridin-4(3H)-one
  • 2-Amino-1H-pteridin-4-one
  • 2-Amino-4-oxopteridine
  • 2-Amino-4(3H)-pteridinone
  • 4(1H)-Pteridinone, 2-amino-
  • 2-Amino-4-hydroxy-pteridine
  • 2-aminopteridin-4(1H)-one
  • 2-Amino-4-pteridinol
  • Quinonoid dihydropterin, 2-amino-
  • 2-desaminoaminopterin
  • 2-Aminopteridin-4-one
  • 2-Desamino-aminopterin
  • 2-Amino-4-hydroxy-1H-pteridine
  • 2-amino-4,8-dihydropteridin-4-one
  • Pterin (VAN)
  • 2-Aminopteridin-4(8H)-one
Show all 35 synonyms
  • ?2-Amino-4-hydroxy-1H-pteridine
  • Pterine, ~95%
  • Sepiapterin Impurity 9
  • 4-Oxo-2-aminopteridine
  • Sapropterin Impurity pterin
  • 2-amino-Quinonoid dihydropterin
  • pteridine, 2-amino-4-hydroxy-
  • 4(3H)-pteridinone, 2-amino-
  • Pterine, >=97.0% (HPLC)
  • 2-Amino-4-hydroxypteridine Solution in Methanol, 1000ug/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

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
163.14 g/molcalc.
Exact mass
163.0494 Dacalc.
LogP (octanol/water)
-0.7calc.
Topological polar surface area
97.55 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
0calc.
Heavy atoms
12calc.
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=c1[nH]cnc2nccnc12

O=c1[nH]cnc2nccnc12

2 rings, 11 atoms, the Pteridin-4-ol ring system.

133 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

Pterin suppliers

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

All 22 suppliers
22 of 22 offers
  • Accela ChemBio Inc.
    United States, San DiegoUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • AChemBlock
    United States, HaywardUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • Acorn PharmaTech, LLC
    United States, Redwood CityUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • Ambinter
    France, OrleansUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • Apexmol
    China, ChongqingUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • Bic Biotech
    China, NanjingUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • Capot
    China, HangzhouUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • ChemFish Tokyo Co., Ltd.
    Japan, TokyoUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • ChemShuttle
    United States, BurlingameUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View
  • Debye Scientific Co., Ltd.
    Hong Kong, Hong KongUnclaimed profile
    PterinGrade, purity and minimum order on request
    Price on request
    View

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

22 suppliers in 6 countries

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

Frequently asked questions

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

What is Pterin?

2-aminopteridin-4-ol is a 2-amino-4-hydroxypteridine. It is a tautomer of a 2-aminopteridin-4(1H)-one and a 2-aminopteridin-4(3H)-one.

What is the CAS number of Pterin?

The CAS registry number of Pterin is 2236-60-4. Other or deprecated CAS numbers: 938-42-1.

What is the molecular formula and weight of Pterin?

The molecular formula of Pterin is C6H5N5O and its molar mass is 163.14 g/mol.

What is Pterin used for?

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

Is Pterin hazardous?

Pterin 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 Pterin?

Pterin 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 Pterin?

CompoundList lists 22 suppliers of Pterin in United States, China, Hong Kong, Czech Republic and 2 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 Pterin?

Suppliers quote Pterin 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 Pterin

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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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