47676
Formaldehyde dimethyl acetal
absolute, over molecular sieve (H2O ≤0.01%), ≥99.0% (GC)
Synonym(s):
Dimethoxymethane, Methylal
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About This Item
Linear Formula:
CH2(OCH3)2
CAS Number:
Molecular Weight:
76.09
Beilstein:
1697025
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22
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grade
absolute
Quality Level
Assay
≥99.0% (GC)
quality
over molecular sieve (H2O ≤0.01%)
refractive index
n20/D 1.354
density
0.860 g/mL at 20 °C (lit.)
functional group
acetal
ether
SMILES string
COCOC
InChI
1S/C3H8O2/c1-4-3-5-2/h3H2,1-2H3
InChI key
NKDDWNXOKDWJAK-UHFFFAOYSA-N
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General description
Formaldehyde dimethyl acetal (FDA, FDMA, FADMA, dimethoxymethane, DMM, methylal) is a biodegradable[1] dimethyl acetal. It has been synthesized by condensing formaldehyde with methanol in the presence of acid catalyst. It is amphiphilic in nature with low viscosity, surface tension and boiling point. It is a flammable, highly volatile solvent with excellent dissolving power.[1] It is reported to form trimethylorthoformate by anodic methoxylation in basic methanol.[2]
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Flam. Liq. 2
Supplementary Hazards
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
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The rotational barrier for a methyl group at the end of an anomeric system is sometimes lower than we might have anticipated. Thus, in the trans-trans conformation of dimethoxymethane, the barrier to methyl rotation is calculated (B3LYP/6-311++G(2d,2p)) to be 2.22
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