Nomenclature
CAS number: 105-57-7
1,1-Diethoxyethane; diethylacetal; acetaldehyde diethyl acetal; ethylidene diethyl ether.
C
6H
14O
2; mol wt 118.17.
C 60.98%, H 11.94%, O 27.08%.
Description and references
Made from acetaldehyde and alcohol in the presence
of anhydrous calcium chloride or of small quantities of mineral acid:
H. Adkins, B. H. Nissen, J. Am. Chem. Soc. 44, 2750 (1922); eidem, Org. Synth. coll. vol. I, 1 (2nd ed., 1941).
Toxicity study: H. F. Smyth et al., J. Ind. Hyg. Toxicol. 31, 60 (1949).
Properties
Volatile liquid. Flammable. d420 0.8254. bp760 102.7°; bp200 66.3°; bp60 39.8°; bp40 31.9°; bp20 19.6°; bp10 8.0°; bp5 2.3°; bp1.0 23°. nD20 1.38193. Flash pt, closed cup: 97°F (36°C). uv spectrum:
Purvis, J. Chem. Soc. 127, 9 (1925). 100 g water dissolve 5 g acetal. Misc with alcohol,
60% alcohol, ether. Sol in heptane, methylcyclohexane, propyl-, isopropyl-,
butyl-, isobutyl alcohol, and ethyl acetate. Tends to polymerize
on standing. Stable to alkalies. LD50 orally in rats: 4.57 g/kg (Smyth).Use
Solvent; in synthetic perfumes such as jasmine;
in organic syntheses.