Description

3-Cyclobutene-1,2-Dione is a highly reactive, four-membered cyclic diketone of significant interest in synthetic organic chemistry. Its unique strained ring structure makes it a valuable building block for the synthesis of complex molecules and novel heterocyclic compounds. This specialty chemical is primarily utilized by research institutions and industrial R&D departments focused on pharmaceutical intermediates, agrochemicals, and advanced material science.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of novel active pharmaceutical ingredients (APIs) and complex heterocyclic scaffolds.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging its reactive diketone functionality.
• Organic Synthesis Building Block: Employed in Diels-Alder reactions and other cycloadditions to construct complex, strained, or fused ring systems.
• Material Science: Investigated for the preparation of specialized polymers and organic electronic materials due to its conjugated system.
• Chemical Research & Development: A crucial reagent for methodology development and exploring new reaction pathways in academic and industrial labs.
• Ligand Synthesis: Used in the preparation of novel chelating agents and catalysts for asymmetric synthesis.

Basic Information

Product Name	3-Cyclobutene-1,2-Dione
CAS No.	32936-74-6
Molecular Formula	C4H2O2
Molecular Weight	82.06 g/mol
Synonyms	Cyclobutenedione; 1,2-Cyclobutenedione; 3,4-Dihydroxycyclobut-3-ene-1,2-dione (tautomer); Squaric Acid (common name for the dihydroxy tautomer); Quadratic Acid; Oxocyclobutenone
EINECS	Contact for details

Quality Control

Our 3-Cyclobutene-1,2-Dione is produced and handled under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR spectroscopy, to ensure it meets the high standards required for research and development applications. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting all critical quality parameters.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Yellow to light brown crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Melting Point	Contact for details
Water Content (KF)	≤ 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.