Description

Ethyl 5-Amino-4-Oxo-3-Phenyl-3,4-Dihydrothieno[3,4-D]Pyridazine-1-Carboxyla Te is a high-purity, advanced pharmaceutical intermediate characterized by its fused heterocyclic structure. This compound matters for its role as a critical building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly those targeting complex disease pathways. Pharmaceutical R&D and fine chemical manufacturers need this precise intermediate to develop next-generation therapeutic agents.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, especially in oncology and central nervous system (CNS) therapeutic research.
• Chemical Synthesis Building Block: Used in medicinal chemistry for constructing complex fused-ring systems and exploring structure-activity relationships (SAR).
• Research & Development: Essential for academic and industrial R&D laboratories focused on heterocyclic chemistry and new molecular entity (NME) discovery.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for custom synthesis projects under cGMP conditions.
• Reference Standard: Serves as a high-purity analytical standard for quality control and method development in API manufacturing.

Basic Information

Item	Details
Product Name	Ethyl 5-Amino-4-Oxo-3-Phenyl-3,4-Dihydrothieno[3,4-D]Pyridazine-1-Carboxyla Te
CAS No.	123542-47-2
Molecular Formula	C15H13N3O3S
Molecular Weight	315.35 g/mol
Synonyms	Ethyl 5-Amino-4-oxo-3-phenyl-3,4-dihydrothieno[3,4-d]pyridazine-1-carboxylate; 5-Amino-1-(ethoxycarbonyl)-3-phenyl-4H-thieno[3,4-d]pyridazin-4-one; 1-Carbethoxy-5-amino-3-phenyl-4H-thieno[3,4-d]pyridazin-4-one; Ethyl 5-amino-3-phenyl-4-oxo-3,4-dihydrothieno[3,4-d]pyridazine-1-carboxylate; Thieno[3,4-d]pyridazine-1-carboxylic acid, 5-amino-4-oxo-3-phenyl-3,4-dihydro-, ethyl ester; CAS 123542-47-2
EINECS	Contact for details

Quality Control

Our Ethyl 5-Amino-4-Oxo-3-Phenyl-3,4-Dihydrothieno[3,4-D]Pyridazine-1-Carboxyla Te is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for pharmaceutical development. Certificates of Analysis (COA) with full traceability are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (typically 15-25°C). This compound is light-sensitive and should be handled under appropriate conditions to maintain stability.

Specification

Item	Specification
Appearance	Yellow to light brown crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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