Description

Isothiazolo[5,4-D]Pyrimidine (8Ci,9Ci) is a high-value heterocyclic organic compound, serving as a critical synthetic intermediate and scaffold in advanced chemical research and development. Its unique fused-ring structure makes it a versatile building block for creating novel molecules with targeted biological or material properties. This compound is primarily sought by pharmaceutical, agrochemical, and specialty chemical R&D teams for applications in drug discovery, crop protection, and functional material synthesis.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly for developing kinase inhibitors and other small-molecule therapeutics.
• Agrochemical Research: Used as a core scaffold for designing and synthesizing new-generation pesticides and herbicides with specific modes of action.
• Chemical Biology Probe Development: Employed in constructing molecular probes to study biological pathways and protein functions.
• Material Science: Serves as a building block for organic electronic materials, such as those used in OLEDs or conductive polymers.
• Academic & Contract Research: Essential for fundamental organic chemistry research and custom synthesis projects in CROs (Contract Research Organizations).

Basic Information

Product Name	Isothiazolo[5,4-D]Pyrimidine (8Ci,9Ci)
CAS No.	272-26-4
Molecular Formula	C5H3N3S
Molecular Weight	137.16 g/mol
Synonyms	Isothiazolo[5,4-d]pyrimidine; Isothiazolo(5,4-d)pyrimidine; 1,2,3-Thiadiazolo[5,4-d]pyrimidine (ambiguous); 272-26-4; NSC 51128; CCRIS 5981; LS-1651; Isothiazolopyrimidine
EINECS	Contact for details

Quality Control

Our Isothiazolo[5,4-D]Pyrimidine is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and NMR/IR for structural confirmation, to ensure it meets the high standards required for research and development. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting identity, purity, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 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.