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M35304

Sigma-Aldrich

Methyl chloroformate

99%

Synonym(s):

MCF, Chloroformic acid methyl ester

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About This Item

Linear Formula:
ClCOOCH3
CAS Number:
79-22-1
Molecular Weight:
94.50
Beilstein:
605437
EC Number:
201-187-3
MDL number:
MFCD00000639
UNSPSC Code:
12352100
PubChem Substance ID:
24896852
NACRES:
NA.22

vapor density

3.26 (vs air)

Quality Level

200

vapor pressure

4.8 psi ( 20 °C)

Assay

99%

autoignition temp.

905 °F

refractive index

n20/D 1.387 (lit.)

bp

70-72 °C (lit.)

density

1.223 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

COC(Cl)=O

InChI

1S/C2H3ClO2/c1-5-2(3)4/h1H3

InChI key

XMJHPCRAQCTCFT-UHFFFAOYSA-N

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Application

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.

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 2 - Skin Corr. 1B

Storage Class Code

3 - Flammable liquids

WGK

WGK 2

Flash Point(F)

50.0 °F - closed cup

Flash Point(C)

10 °C - closed cup

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

FSL

Group 4: Flammable liquids
Type 1 petroleums
Hazardous rank II
Water insoluble liquid

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

M35304-500ML:
M35304-VAR:
M35304-100ML:
M35304-5ML:
M35304-500G:
M35304-100G:
M35304-5G:
M35304-20ML:
M35304-BULK:

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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)
Regio-and chemoselective addition of alkynyltin reagents to the 2-position of 3-acylpyridines activated by methyl chloroformate: selective synthesis of 2, 3-disubstituted 1, 2-dihydropyridines.
Yamaguchi R, et al.
Tetrahedron Letters, 29(15), 1785-1788 (1988)
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Madsen R B, et al.
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