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LC2778 Formaldehyde dimethyl acetal

for synthesis


Order number Packaging Quantity Price €
AC29778 Glass bottle 1 l 13.05
AC29778 Glass bottle 2.5 l 22.5


Product information
Synonyms Formal, Methylal, Dimethoxymethane
Hill Formula C3H8O2
Chemical formula CH2(OCH3)2
HS Code 2911 00 00
EC number 203-714-2
Molar mass 76.11 g/mol
Storage Store below +15°C.
CAS number 109-87-5


Chemical and physical data
Ignition temperature 235 °C
Solubility 285 g/l (20 °C)
Saturation concentration (air) 1375 g/m3 (20 °C)
Melting point -105 °C
Molar mass 76.09 g/mol
Density 0.86 g/cm3 (20 °C)
Boiling point 43 °C
Vapor pressure 440 hPa (20 °C)
Explosion limit 1.6 – 17.6 %(V)
Flash point -18 °C
Refractive index 1.3541 (20 °C, 589 nm)


Safety information
R Phrase R 11-20/21/22-68/20/21/22
Highly flammable.Harmful by inhalation, in contact with skin and if swallowed.Harmful: possible risk of irreversible effects through inhalation, in contact with skin and if swallowed.
S Phrase S 9-16-36/37
Keep container in a well-ventilated place.Keep away from sources of ignition – No smoking.Wear suitable protective clothing and gloves.
Categories of danger highly flammable, harmful
Hazard Symbol



RTECS PA8750000
Storage class 3 Flammable Liquids
WGK WGK 1 slightly water endangering
Disposal 3
Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.



Transport information
Declaration (transport by sea) IMDG-Code UN 1234 METHYLAL, 3, II
Declaration (transport by air) IATA-DGR UN 1234 METHYLAL, 3, II



Assay (GC, area%) ∼92%
Density (d 20 °C/ 4 °C) 0.857 – 0.859
Methanol (GC, area%) ∼6%
Identity (IR) passes test


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