Methyl chloroformate


MCF, Chloroformic acid methyl ester
Linear Formula:
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

vapor density

3.26 (vs air)

vapor pressure

4.8 psi ( 20 °C)



autoignition temp.

905 °F

refractive index

n20/D 1.387 (lit.)


70-72 °C (lit.)


1.223 g/mL at 25 °C (lit.)

storage temp.


SMILES string




InChI key


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Methyl chloroformate (MCF) is generally used for the derivatization of functional groups such as carboxylic acids, amines, and phenols.
MCF can also be used:
  • To activate 3-acylpyridines for nucleophilic addition with alkynyltin reagents to form 2,3-disubstituted 1,2-dihydropyridines.
  • Chloroesterification of terminal alkynes to form β-chloro-α,β-unsaturated esters.
  • As an electrophilic reagent to mediate the reaction of pyridine with lithium dialkyl- or diarylcuprates to form 4-substituted 1,4-dihydropyridine derivatives.
  • To convert nitronates into methoxycarbonyl nitronates.


100, 500 g in Sure/Seal™
5 g in glass bottle

Signal Word



UN1238 - class 6.1 - PG 1 - Methyl chloroformate

WGK Germany


Flash Point(F)

50.0 °F - closed cup

Flash Point(C)

10 °C - closed cup

Kathleen F Smart et al.
Nature protocols, 5(10), 1709-1729 (2010-10-05)
This protocol describes an analytical platform for the analysis of intra- and extracellular metabolites of microbial cells (yeast, filamentous fungi and bacteria) using gas chromatography-mass spectrometry (GC-MS). The protocol is subdivided into sampling, sample preparation, chemical derivatization of metabolites, GC-MS...
M G Zampolli et al.
Journal of chromatography. A, 1150(1-2), 162-172 (2007-01-16)
This work describes a GC-MS method for enantioselective separation of amino acids. The method is based on a derivatization reaction which employs a mixture of alkyl chloroformate-alcohol-pyridine, as reagents to obtain the N(O,S)-alkyl alkoxy carbonyl esters of amino acids. Various...
Thibaut D J Delplancke et al.
Scientific reports, 8(1), 36-36 (2018-01-10)
The hair metabolome has been recognized as a valuable source of information in pregnancy research, as it provides stable metabolite information that could assist with studying biomarkers or metabolic mechanisms of pregnancy and its complications. We tested the hypothesis that...
Reaction of Cuprate Reagents with Pyridine in the Presence of Chloroformate. A Novel Synthesis of 1, 4-Dihydropyridine Derivatives.
Piers E and Soucy M
Canadian Journal of Chemistry, 52(20), 3563-3564 (1974)
Francesca Casu et al.
Metabolomics : Official journal of the Metabolomic Society, 14(8), 103-103 (2019-03-05)
Saccharomyces cerevisiae has been widely used for fermenting food and beverages for over thousands years. Its metabolism together with the substrate composition play an important role in determining the characteristics of the final fermented products. We previously showed that the...

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