Description

4-Pyrimidinethiol (9Ci) CAS NO 133039-82-4 is a sulfur-containing heterocyclic compound that serves as a versatile and critical building block in advanced organic synthesis. Its unique pyrimidine-thiol structure makes it a valuable precursor for the development of pharmaceuticals, agrochemicals, and functional materials. This high-purity intermediate is essential for research and production chemists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to incorporate the pyrimidine scaffold into novel molecules.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing active pharmaceutical ingredients (APIs), particularly in antiviral, anticancer, and central nervous system (CNS) drug discovery programs.
• Agrochemical Synthesis: Used in the research and production of novel fungicides, herbicides, and plant growth regulators that leverage the pyrimidine core for bioactivity.
• Ligand and Catalyst Precursor: Serves as a starting material for creating sulfur-based ligands used in transition metal catalysis and coordination chemistry.
• Material Science Research: Employed in the development of organic electronic materials, such as semiconductors and conductive polymers, due to its electron-rich heterocyclic structure.
• Chemical Biology Probe Development: Utilized to create thiol-reactive probes and affinity tags for studying protein function and enzyme mechanisms.
• Custom Synthesis and Contract Manufacturing: A fundamental reagent for custom synthesis houses and CDMOs (Contract Development and Manufacturing Organizations) producing specialized fine chemicals for clients.

Basic Information

Product Name	4-Pyrimidinethiol (9Ci)
CAS No.	133039-82-4
Molecular Formula	C4H4N2S
Molecular Weight	112.15 g/mol
Synonyms	4-Mercaptopyrimidine; 4-Pyrimidinethiol; Pyrimidine-4-thiol; 1H-Pyrimidine-4-thione; 4-Thiopyrimidone; 4-Pyrimidinol, thio-; 4(1H)-Pyrimidinethione
EINECS	Contact for details

Quality Control

Our 4-Pyrimidinethiol is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity suitable for demanding synthetic applications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing purity, identity, and impurity profiles. Our quality system is designed to meet the stringent requirements of GMP and ISO standards for fine chemical production.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C for long-term stability. This material is easily oxidized and moisture-sensitive; ensure containers are sealed immediately after use.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.