Dibutoxymethane
Synonym(s):Butylal;Dibutoxymethane;Dibutyl formal
- CAS NO.:2568-90-3
- Empirical Formula: C9H20O2
- Molecular Weight: 160.25
- MDL number: MFCD00059270
- EINECS: 219-909-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-06-08 17:06:36
What is Dibutoxymethane?
The Uses of Dibutoxymethane
Formaldehyde dibutyl acetal is a halogen-free and less toxic solvent that can be used to solubilize commercial low-density polyethylene (LDPE) samples to analyze molecular weight distribution using gel permeation chromatography (GPC). It can also be used as a reactant to prepare butoxymethyltriphenylphosphonium iodide, which is used for carbon homologation and also as a useful key intermediate in organic synthesis.
Preparation
A flask containing 15 gm (0.5 mole) of paraformaldehyde, 74 gm (1.0 mole) of η-butyl alcohol, and 2.0 gm of anhydrous ferric chloride is refluxed for 10 hr. The lower layer of 3-4 ml of material is discarded and then 50 ml of 10% aqueous sodium carbonate solution is added to remove the ferric chloride as ferric hydroxide. The product is shaken with a mixture of 40 ml of 20% hydrogen peroxide and 5 ml of 10% sodium carbonate solution at 45°C in order to remove any remaining aldehyde. The product is also washed with water, dried, and distilled from excess sodium metal to afford 62 gm (78%).
Synthesis Reference(s)
The Journal of Organic Chemistry, 45, p. 3341, 1980 DOI: 10.1021/jo01304a039
General Description
Formaldehyde dibutyl acetal is an acetal used in the manufacture of synthetic resins, antiseptics, deodorants, and fungicides. It is also used as a fuel additive to increase the octane number of gasoline or the n-cetane number of diesel fuels and reduce smoke and particulate emissions.
Properties of Dibutoxymethane
Melting point: | -58.1°C |
Boiling point: | 180°C |
Density | 0,84 g/cm3 |
vapor pressure | 1-1.11hPa at 22.7-25℃ |
refractive index | n20/D1.406 |
Flash point: | 60°C |
form | clear liquid |
color | Colorless to Almost colorless |
Water Solubility | 222.5-250mg/L at 20℃ |
EPA Substance Registry System | Butane, 1,1'-[methylenebis(oxy)]bis- (2568-90-3) |
Safety information for Dibutoxymethane
Signal word | Warning |
Pictogram(s) |
Flame Flammables GHS02 |
GHS Hazard Statements |
H226:Flammable liquids |
Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P370+P378:In case of fire: Use … for extinction. P403+P235:Store in a well-ventilated place. Keep cool. P501:Dispose of contents/container to..… |
Computed Descriptors for Dibutoxymethane
New Products
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