Description

4H-Pyrimido[5,4-D][1,3]Oxazine (8Ci,9Ci) is a specialized heterocyclic organic compound with the CAS registry number 28647-47-4. This high-value chemical intermediate is critical for advanced research and development in pharmaceutical and agrochemical synthesis. It is primarily sought by R&D chemists and process development scientists working on novel active ingredients, particularly in the fields of medicinal chemistry and crop protection.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of novel drug candidates, particularly for central nervous system (CNS) and antiviral targets.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides with unique modes of action.
• Material Science Precursor: Acts as a precursor for advanced organic materials, including ligands for catalysis and components for organic electronics.
• Academic & Institutional Research: Employed in universities and research institutes for studying heterocyclic chemistry, reaction mechanisms, and structure-activity relationships (SAR).
• Contract Research & Manufacturing (CRO/CMO): Supplied to organizations providing custom synthesis and process scale-up services for client projects.

Basic Information

Product Name	4H-Pyrimido[5,4-D][1,3]Oxazine (8Ci,9Ci)
CAS No.	28647-47-4
Molecular Formula	C6H4N4O
Molecular Weight	148.12 g/mol
Synonyms	4H-Pyrimido[5,4-d][1,3]oxazine; Pyrimido[5,4-d][1,3]oxazine, 4H-; 4H-Pyrimido[5,4-d]-1,3-oxazine; 28647-47-4; 4H-Pyrimido[5,4-d]oxazine; 4H-1,3-Oxazino[5,4-d]pyrimidine
EINECS	Contact for details

Quality Control

Every batch of 4H-Pyrimido[5,4-D][1,3]Oxazine (8Ci,9Ci) is produced and tested under strict quality management protocols to ensure identity, purity, and consistency. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request, detailing key parameters such as assay purity and impurity profiles.

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 incompatible materials. For long-term storage, consider an inert atmosphere to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (HPLC, Area %)	≥ 97.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%

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