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D134651

Sigma-Aldrich

Dimethoxymethane

ReagentPlus®, 99%

Synonym(s):

Formaldehyde dimethyl acetal, Methylal

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About This Item

Linear Formula:
CH2(OCH3)2
CAS Number:
109-87-5
Molecular Weight:
76.09
Beilstein:
1697025
EC Number:
203-714-2
MDL number:
MFCD00008495
UNSPSC Code:
12352100
PubChem Substance ID:
24893265

vapor density

2.6 (vs air)

Quality Level

200

vapor pressure

6.38 psi ( 20 °C)

product line

ReagentPlus®

Assay

99%

form

liquid

autoignition temp.

459 °F

expl. lim.

17.6 %

refractive index

n20/D 1.354 (lit.)

bp

41-42 °C (lit.)

mp

−105 °C (lit.)

density

0.86 g/mL at 25 °C (lit.)

SMILES string

COCOC

InChI

1S/C3H8O2/c1-4-3-5-2/h3H2,1-2H3

InChI key

NKDDWNXOKDWJAK-UHFFFAOYSA-N

Related Categories

General description

Dimethoxymethane (DMM, methylal) is a biodegradable dimethyl acetal. It can be synthesized by acid catalyzed condensation of formaldehyde with methanol. It is amphiphilic in nature with low viscosity, surface tension and boiling point. It is a flammable, highly volatile solvent with good dissolving power. DMM is considered as a potential alternative fuel and fuel additive due to its high oxygen content and its ability to enhance the combustion characteristics of diesel and petrol. Its thermal diffusivity has been determined by photoacoustic method. Analysis of the molecular structure of DMM by electron diffraction technique shows that it has C2 symmetry with a gauche-gauche conformation.

Application

Dimethoxymethane (Formaldehyde dimethyl acetal) may be used in the synthesis of methoxymethyl (MOM) ethers. It may also be used as an external cross-linker to form microporous polymers.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

Flame
GHS02

Signal Word

Danger

Hazard Statements

H225

Hazard Classifications

Flam. Liq. 2

Supplementary Hazards

EUH019

Storage Class Code

3 - Flammable liquids

WGK

WGK 1

Flash Point(F)

-0.4 °F - closed cup

Flash Point(C)

-18 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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.

EU REACH Annex XVII (Restriction List)

CAS No.

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Certificates of Analysis (COA)

Lot/Batch Number
STBK5987
STBK1803
MKCN4287
STBJ7855
MKCM3151

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A photoacoustic study on Dimethoxymethane.
Bama GK and Ramachandran K.
AIP Conference Proceedings, 1004, 191-191 (2008)
The molecular structure of dimethoxymethane.
Astrup EE.
Acta Chemica Scandinavica, 27(9), 3271-3276 (1973)
Purification and dehydration of methylal by pervaporation.
Carretier E, et al.
Journal of Membrane Science, 217(1), 159-171 (2003)
A new strategy to microporous polymers: knitting rigid aromatic building blocks by external cross-linker.
Li B, et al.
Macromolecules, 44(8), 2410-2414 (2011)
Scandium trifluoromethanesulfonate as a recyclable catalyst for efficient methoxymethylation of alcohols.
Karimi B and Ma'mani L.
Tetrahedron Letters, 44(32), 6051-6053 (2003)
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