Description

Ch3Ch=C=C=O CAS NO 78957-08-1 is a highly reactive, unsaturated ketene derivative with a unique conjugated allene-ketene structure. This compound serves as a versatile and valuable building block in advanced organic synthesis, enabling the construction of complex molecular frameworks. It is primarily sought after by research and development chemists in the pharmaceutical, agrochemical, and specialty chemical industries for the synthesis of novel heterocycles, polymers, and fine chemicals.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel active pharmaceutical ingredients (APIs) and heterocyclic compounds.
• Agrochemical Synthesis: Used in the development of new herbicides, fungicides, and insecticides with unique modes of action.
• Polymer & Material Science: Acts as a monomer or cross-linking agent for creating specialty polymers with tailored thermal or mechanical properties.
• Fine Chemical Production: Employed in the manufacture of dyes, pigments, and advanced organic electronic materials.
• Academic & Industrial R&D: A crucial reagent for methodology development and exploring new reaction pathways in organic chemistry.
• Chemical Biology Probes: Useful for synthesizing molecular probes to study biological processes due to its high reactivity.

Basic Information

Product Name	Ch3Ch=C=C=O CAS NO 78957-08-1
CAS No.	78957-08-1
Molecular Formula	C4H4O
Molecular Weight	68.07 g/mol
Synonyms	1-Buten-3-yn-2-one; 3-Butyn-2-one; Methyl ethynyl ketone; Acetylacetylene; Propiolaldehyde, methyl-; Ketene, (1-methylvinylidene)-; But-1-en-3-yn-2-one
EINECS	Contact for details

Quality Control

Every batch of Ch3Ch=C=C=O is produced and analyzed under strict quality management protocols to ensure consistency and purity for demanding synthetic applications. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at recommended temperatures between 2°C and 8°C to minimize decomposition and polymerization. Due to its highly volatile and easily oxidized nature, the container should be kept in a cool, dry, well-ventilated area away from heat and ignition sources. Allow the container to reach ambient temperature before opening to prevent moisture ingress.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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