Dimethoxymethane

Not to be confused with dimethoxyethane.
"Methylal" redirects here. Not to be confused with Methanal or Methylol.
Dimethoxymethane
Structural formula of dimethoxymethane
Ball and stick model of dimethoxymethane
Names
Preferred IUPAC name
Dimethoxymethane
Other names
Formal

Formaldehyde dimethyl ether
Methylal
Dimethylformal (DMFL)
Formaldehyde dimethylacetal
Methoxymethyl methyl ether

Methylene dimethyl ether
Identifiers
3D model (JSmol)
1697025
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.003.378 Edit this at Wikidata
EC Number
  • 203-714-2
100776
MeSH Dimethoxymethane
RTECS number
  • PA8750000
UNII
UN number 1234
  • InChI=1S/C3H8O2/c1-4-3-5-2/h3H2,1-2H3 checkY
    Key: NKDDWNXOKDWJAK-UHFFFAOYSA-N checkY
  • InChI=1/C3H8O2/c1-4-3-5-2/h3H2,1-2H3
    Key: NKDDWNXOKDWJAK-UHFFFAOYAE
  • COCOC
Properties
C3H8O2
Molar mass 76.095 g·mol−1
Appearance Colorless liquid[1]
Odor Chloroform-like[1]
Density 0.8593 g cm−3 (at 20 °C)[1]
Melting point −105 °C (−157 °F; 168 K)[1][3]
Boiling point 42 °C (108 °F; 315 K)[1][3]
33% (20 °C)[2][clarification needed]
Vapor pressure 330 mmHg (20 °C)[2]
−47.3·10−6 cm3/mol
Hazards
GHS labelling:
GHS02: FlammableGHS07: Exclamation mark
Danger
H225, H315, H319, H335
P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501
Flash point −18 °C (0 °F; 255 K)
Explosive limits 2.2–13.8%[2]
Lethal dose or concentration (LD, LC):
5708 mg/kg (rabbit, oral)[4]
18000 ppm (mouse, 7 hr)
15000 ppm (rat)
18354 ppm (mouse, 7 hr)[4]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1000 ppm (3100 mg/m3)[2]
REL (Recommended)
 TWA 1000 ppm (3100 mg/m3)[2]
IDLH (Immediate danger)
 2200 ppm[2]
Related compounds
Related Ethers
 Dimethoxyethane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dimethoxymethane, also called methylal, is a colorless flammable liquid with a low boiling point, low viscosity and excellent dissolving power. It has a chloroform-like odor and a pungent taste. It is the dimethyl acetal of formaldehyde. Dimethoxymethane is soluble in three parts water[clarification needed] and miscible with most common organic solvents.

  1. ^ a b c d e Merck Index, 11th Edition, 5936
  2. ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0396". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ a b International Chemical Safety Card 1152
  4. ^ a b "Methylal". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).