2-Methylthio-4-pyrimidinol - ≥98% , CAS No.5751-20-2

CAS: 5751-20-2 Cat. No.: M139019 Formula: C5H6N2OS Molecular Weight: 142.18 EC Number: 227-274-6
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
2-Methylthiopyrimidin-4-ol | NSC125339 | NSC-125339 | 2-Methylthiouracil | FT-0768849 | EN300-94701 | FT-0635836 | MFCD00955672 | NSC-165518 | 2-(methyl-thio)pyrimidin-4-ol | 2-(methylthio)pyrimidin-4-ol | 2-(methyl-thio)pyrimidine-4(3H)-one | 2-(Methylth
Storage
Room temperature
Shipped In
Normal
Size
USA
Germany (EU)*
Price
Qty
1g
M139019-1g
In stock ≥10
$9.90
5g
M139019-5g
3 In stock
$10.90
25g
M139019-25g
2 In stock

$13.90

$20.90
Save $7.00 (33.49%)
100g
M139019-100g
2 In stock

$54.90

$82.90
Save $28.00 (33.78%)
500g
M139019-500g
Made to order · 8–12 wks

$273.90

$410.90
Save $137.00 (33.34%)
Enter a quantity for the sizes you want to add.
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
2-Methylthiopyrimidin-4-ol | NSC125339 | NSC-125339 | 2-Methylthiouracil | FT-0768849 | EN300-94701 | FT-0635836 | MFCD00955672 | NSC-165518 | 2-(methyl-thio)pyrimidin-4-ol | 2-(methylthio)pyrimidin-4-ol | 2-(methyl-thio)pyrimidine-4(3H)-one | 2-(Methylth
Specifications & Purity
≥98%
Storage
Room temperature
Shipped In
Normal
Purity
≥98%
Names and Identifiers
Pubchem Sid488185784
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488185784
Canonical SmilesCSC1=NC=CC(=O)N1
IUPAC Name2-methylsulfanyl-1H-pyrimidin-6-one
InChIKeyUYHSQVMHSFXUOA-UHFFFAOYSA-N
INCHI1S/C5H6N2OS/c1-9-5-6-3-2-4(8)7-5/h2-3H,1H3,(H,6,7,8)
Isomeric SMILES CSC1=NC=CC(=O)N1
Molecular Weight 142.18
Reaxy-Rn 120367
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=120367&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganosulfur compounds
ClassThioethers
SubclassAryl thioethers
Intermediate Tree Nodes Not available
Direct ParentAryl thioethers
Alternative Parents Pyrimidones  Alkylarylthioethers  Hydropyrimidines  Heteroaromatic compounds  Lactams  Sulfenyl compounds  Azacyclic compounds  Organopnictogen compounds  Organooxygen compounds  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteromonocyclic compounds
Substituents Aryl thioether - Pyrimidone - Alkylarylthioether - Hydropyrimidine - Pyrimidine - Heteroaromatic compound - Lactam - Sulfenyl compound - Azacycle - Organoheterocyclic compound - Organic nitrogen compound - Hydrocarbon derivative - Organic oxide - Organopnictogen compound - Organooxygen compound - Organonitrogen compound - Organic oxygen compound - Aromatic heteromonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as aryl thioethers. These are organosulfur compounds containing a thioether group that is substituted by an aryl group.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

5 results found

Lot NumberCertificate TypeDateItem
F1701003Certificate of AnalysisAug 13, 2026 M139019
D2320107Certificate of AnalysisFeb 11, 2025 M139019
K2130432Certificate of AnalysisSep 15, 2023 M139019
K2130433Certificate of AnalysisSep 15, 2023 M139019
K2130467Certificate of AnalysisSep 15, 2023 M139019
Chemical and Physical Properties
Melt Point(°C)202 °C
Molecular Weight142.180 g/mol
XLogP30.500
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count3
Rotatable Bond Count1
Exact Mass142.02 Da
Monoisotopic Mass142.02 Da
Topological Polar Surface Area66.800 Ų
Heavy Atom Count9
Formal Charge0
Complexity185.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Solution Calculators
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