Propionaldehyde
Title: Propionaldehyde
CAS Registry Number: 123-38-6
CAS Name: Propanal
Additional Names: methylacetaldehyde; propylaldehyde
Molecular Formula: C3H6O
Molecular Weight: 58.08
Percent Composition: C 62.04%, H 10.41%, O 27.55%
Line Formula: CH3CH2CHO
Literature References: Prepd by treating propyl alcohol with a bichromate oxidizing mixture: C. D. Hurd, R. N. Meinert, Org. Synth. coll. vol. II, 541 (1943); by passing propyl alcohol vapor over copper at high temp: Sabatier, Senderens, Compt. Rend. 136, 923 (1903); Willimott, Analyst 50, 13; Chem. Zentralbl. 1925, I, 2097. Toxicity study: H. F. Smyth et al., Arch. Ind. Hyg. Occup. Med. 4, 119 (1951).
Properties: Liq. Suffocating odor. d40 0.8432; d49.7 0.8192; d420 0.8071; d433 0.7898. mp -81°. bp760 49°; bp740 47°; bp687 45°. n58016.6 1.3695; nD19 1.36460. Flash pt, open cup: <20°F (<-6°C). Absorption spectrum: Kwiecinski, Marchlewski, Bull. Soc. Chim. [4] 45, 608 (1929). Sol in 5 vols water at 20°. Misc with alc and ether. LD50 orally in rats: 1.4 g/kg; LC for rats in air: 8000 ppm (Smyth).
Melting point: mp -81°
Boiling point: bp760 49°; bp740 47°; bp687 45°
Flash point: Flash pt, open cup: <20°F (<-6°C)
Index of refraction: n58016.6 1.3695; nD19 1.36460
Density: d40 0.8432; d49.7 0.8192; d420 0.8071; d433 0.7898
Toxicity data: LD50 orally in rats: 1.4 g/kg; LC for rats in air: 8000 ppm (Smyth)

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