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Ethyl Oxalyl Monochloride

CAS NO. 4755-77-5
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Product Name Ethyl Oxalyl Monochloride
(Synonyms: Ethyl chlorooxoacetate; Ethyl (chloroformyl)formate)
CAS NO. 4755-77-5
Formula & Weight C4H5ClO3 (MW: 136.53)
Chemical Structure Structure of CAS 4755-77-5
Technical Specifications
  • Appearance: Colorless transparent liquid

  • Purity (GC): ≥ 98.0%

  • Boiling Point: 135°C

  • Density: 1.22 g/mL at 25°C

  • Solubility: Miscible with organic solvents; reacts with water.

Key Applications

Intermediate for high-value synthesis:

  • Pharma Synthesis: Key acylating agent for antibiotics (e.g., Cefazolin, Cefamandole) and other APIs.

  • Agrochemicals: Critical building block for high-efficiency herbicides and crop protection agents.

  • Organic Synthesis: Efficient reagent for introducing chlorocarbonyl groups.

Handling & Storage
Storage: Moisture sensitive. Store under inert gas in a cool, dry place.
Safety: Corrosive. Handle with appropriate PPE. Refer to MSDS before use.

Sourcing High-Purity Intermediates?

Royalchem ensures stable supply of Ethyl Oxalyl Monochloride for your production needs.        
We support global logistics with full regulatory compliance.

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