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D134651 Sigma-Aldrich

Dimethoxymethane

ReagentPlus®, 99%

Synonym: Formaldehyde dimethyl acetal, Methylal

  • CAS Number 109-87-5

  • Linear Formula CH2(OCH3)2

  • Molecular Weight 76.09

  •  Beilstein Registry Number 1697025

  •  EC Number 203-714-2

  •  MDL number MFCD00008495

  •  PubChem Substance ID 24893265

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Properties

grade   ReagentPlus®
vapor density   2.6 (vs air)
vapor pressure   6.38 psi ( 20 °C)
InChI Key   NKDDWNXOKDWJAK-UHFFFAOYSA-N
assay   99%
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.)

Description

Packaging

1, 2.5 L in glass bottle

100 mL in glass bottle

18 L in steel drum

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.

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.

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

Price and Availability

Safety & Documentation

Safety Information

Symbol 
GHS02  GHS02
Signal word 
Danger
Hazard statements 
Precautionary statements 
Supplemental Hazard Statements 
May form explosive peroxides.
RIDADR 
UN1234 - class 3 - PG 2 - Methylal
WGK Germany 
1
RTECS 
PA8750000
Flash Point(F) 
-.4 °F
Flash Point(C) 
-18 °C

Documents

Certificate of Analysis

Certificate of Origin

Protocols & Articles
Peer-Reviewed Papers
15

References

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