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295914

Sigma-Aldrich

Methyl difluoroacetate

96%

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About This Item

Linear Formula:
F2CHCO2CH3
CAS Number:
433-53-4
Molecular Weight:
110.06
EC Number:
207-089-7
MDL number:
MFCD00039276
UNSPSC Code:
12352100
PubChem Substance ID:
24857822
NACRES:
NA.22

Assay

96%

refractive index

n20/D 1.334 (lit.)

bp

85-86 °C (lit.)

density

1.26 g/mL at 25 °C (lit.)

SMILES string

COC(=O)C(F)F

InChI

1S/C3H4F2O2/c1-7-3(6)2(4)5/h2H,1H3

InChI key

CSSYKHYGURSRAZ-UHFFFAOYSA-N

General description

The gas-phase reactions of Cl atoms with methyl difluoroacetate have been investigated at 296 ± 2K and atmospheric pressure of synthetic air.

Application

Methyl difluoroacetate has been used:
  • to compose the electrolyte for Lithium ion cells, also showed good inhibition of aluminum cathode current collector corrosion
  • as electrolyte solvent for improvement of thermal stability in lithium-ion batteries

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Danger

Hazard Statements

H225,H302,H315,H319,H335

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

65.1 °F - closed cup - (own results)

Flash Point(C)

18.4 °C - closed cup - (own results)

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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Methyl difluoroacetate inhibits corrosion of aluminum cathode current collector for lithium ion cells.
Kawamura T, et al.
Electrochemical and Solid-State Letters, 8(9), A459-A463 (2005)
M B Blanco et al.
Environmental science & technology, 44(7), 2354-2359 (2010-03-13)
A 1080 L environmental chamber with in situ FTIR spectroscopy detection was used to study the product distribution and the mechanism of the Cl-initiated photooxidation of a series of fluoroacetates. The gas-phase reactions of Cl atoms with ethyl trifluoroacetate (CF(3)C(O)OCH(2)CH(3))
Properties of carbon anodes and thermal stability in LiPF6/methyl difluoroacetate electrolyte.
Ihara M, et al.
Journal of the Electrochemical Society, 150(11), A1476-A1483 (2003)

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