Description

3-Cyclobutene-1,2-Dione, 3,4-Diethynyl- (9Ci) is a highly functionalized cyclobutenedione derivative, serving as a valuable synthetic building block in advanced organic chemistry. Its unique structure, featuring both a diketone moiety and terminal ethynyl groups, makes it a versatile precursor for constructing complex molecular architectures, including conjugated polymers and macrocyclic compounds. This specialty chemical is primarily utilized by researchers and process development chemists in the pharmaceutical, agrochemical, and materials science industries for the synthesis of novel compounds with tailored electronic and structural properties.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates and active pharmaceutical ingredients (APIs), particularly for constructing complex, fused-ring systems.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and pesticides with unique modes of action.
• Advanced Material Synthesis: Building block for creating conjugated polymers, organic semiconductors, and nonlinear optical (NLO) materials for electronic and photonic applications.
• Ligand and Catalyst Development: Serves as a scaffold for synthesizing novel chelating ligands and organometallic catalysts used in asymmetric synthesis.
• Academic & Industrial R&D: Fundamental reagent for exploring new organic reactions, cycloadditions, and the construction of strained or complex carbon skeletons in research laboratories.

Basic Information

Product Name	3-Cyclobutene-1,2-Dione, 3,4-Diethynyl- (9Ci)
CAS No.	123002-91-5
Molecular Formula	C8H2O2
Molecular Weight	130.10 g/mol
Synonyms	3,4-Diethynyl-3-cyclobutene-1,2-dione; 3,4-Diethynylcyclobut-3-ene-1,2-dione; 3,4-Diethynyl-1,2-cyclobutenedione; 1,2-Cyclobutenedione, 3,4-diethynyl-; 3,4-Bis(ethynyl)cyclobut-3-ene-1,2-dione
EINECS	Contact for details

Quality Control

Our production of 3-Cyclobutene-1,2-Dione, 3,4-Diethynyl- (9Ci) adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for research and development applications. Each lot undergoes comprehensive analytical characterization, including HPLC, NMR, and IR spectroscopy. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profile is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flames. Due to its light-sensitive nature, containers should be kept in amber glass or opaque packaging during storage and handling.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Melting Point	Contact for details
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.