Description

4,4'-Dichlorodiphenylacetylene is a high-value organic intermediate featuring a rigid, linear acetylene core symmetrically substituted with chlorinated phenyl rings. This compound matters for its role as a critical building block in the synthesis of advanced materials and pharmaceuticals, where its molecular structure enables precise control over the final product's properties. It is primarily needed by R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty polymer industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key synthon in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a rigid, conjugated backbone.
• Agrochemical Synthesis: Used in the production of advanced herbicides and fungicides, where the dichloro-substituted diphenylacetylene moiety contributes to biological activity.
• Liquid Crystal & OLED Materials: Serves as a fundamental core structure for creating liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs) due to its linearity and electronic properties.
• Polymer & Resin Modifier: Incorporated into specialty polymers to enhance thermal stability, rigidity, and optical characteristics.
• Cross-Coupling Reactions: An essential substrate in Sonogashira, Heck, and other palladium-catalyzed cross-coupling reactions for carbon-carbon bond formation.
• Organic Semiconductor Research: Investigated as a component in the development of novel organic electronic materials and conductive polymers.

Basic Information

Product Name	4,4'-Dichlorodiphenylacetylene
CAS No.	1820-42-4
Molecular Formula	C14H8Cl2
Molecular Weight	247.12 g/mol
Synonyms	1,1'-(1,2-Ethenediyl)bis[4-chlorobenzene]; 4,4'-Dichlorodiphenylethyne; 4-Chlorophenylacetylene, 4'-chloro-; Bis(4-chlorophenyl)acetylene; p,p'-Dichlorodiphenylacetylene; 4,4'-Dichlorotolan; NSC 406908
EINECS	217-342-5

Quality Control

Our 4,4'-Dichlorodiphenylacetylene is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high purity and batch-to-batch consistency. Certificates of Analysis (COA) detailing all specifications are provided and available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	145 - 149 °C
Loss on Drying	≤ 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.