Description

4-Chloro-5-Ethyl-6-Methylthieno[2,3-D]Pyrimidine is a high-purity, heterocyclic organic compound serving as a critical building block in advanced chemical synthesis. This specialized pyrimidine derivative is valued for its unique molecular scaffold, which enables the development of novel compounds with targeted biological or material properties. It is primarily sought after by research institutions and industrial R&D departments in the pharmaceutical and agrochemical sectors for use as a key intermediate in the synthesis of active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the research and development of novel drug candidates, particularly in kinase inhibitor and antiviral therapeutic areas.
• Agrochemical Synthesis: Used in the creation of advanced herbicides, fungicides, and insecticides, leveraging its thienopyrimidine core for biological activity.
• Material Science Research: Serves as a building block for organic electronic materials, such as semiconductors and light-emitting components, due to its fused heterocyclic structure.
• Chemical Reference Standard: Employed as a high-purity analytical standard for quality control and method development in analytical laboratories.
• Custom Synthesis & Contract Manufacturing: A vital starting material for custom synthesis projects and scale-up production for specialized client requirements.

Basic Information

Product Name	4-Chloro-5-Ethyl-6-Methylthieno[2,3-D]Pyrimidine
CAS No.	439692-90-7
Molecular Formula	C9H9ClN2S
Molecular Weight	212.70 g/mol
Synonyms	4-Chloro-5-ethyl-6-methylthieno[2,3-d]pyrimidine; Thieno[2,3-d]pyrimidine, 4-chloro-5-ethyl-6-methyl-; 5-Ethyl-6-methyl-4-chlorothieno[2,3-d]pyrimidine; 4-Chloro-5-ethyl-6-methyl-thieno[2,3-d]pyrimidine; CAS 439692-90-7
EINECS	Contact for details

Quality Control

Every batch of 4-Chloro-5-Ethyl-6-Methylthieno[2,3-D]Pyrimidine is manufactured under strict quality management systems. We provide comprehensive analytical documentation, including Certificates of Analysis (COA) with detailed results from HPLC, NMR, and mass spectrometry to verify identity, purity, and conformity to client specifications. Our quality commitment ensures material traceability and consistency, supporting your critical R&D and production processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from strong oxidizing agents and bases. For long-term storage, consider inert atmosphere conditions to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (HPLC/IR)	Conforms to reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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