Isobutyl Alcohol
Title: Isobutyl Alcohol
CAS Registry Number: 78-83-1
CAS Name: 2-Methyl-1-propanol
Additional Names: isopropylcarbinol; 1-hydroxymethylpropane; fermentation butyl alcohol
Molecular Formula: C4H10O
Molecular Weight: 74.12
Percent Composition: C 64.82%, H 13.60%, O 21.59%
Line Formula: (CH3)2CHCH2OH
Literature References: Present in fusel oil; also produced by fermentation of carbohydrates: Baraud, Genevois, Compt. Rend. 247, 2479 (1958); Sukhodol, Chatskii, Spirt. Promst. 28, 35 (1962), C.A. 57, 5124e (1962). Prepn: Wender et al., J. Am. Chem. Soc. 71, 4160 (1949); Schreyer, US 2564130 (1951 to du Pont); Pistor, US 2753366; Harrer, Rühl, DE 1011865; Himmler, Schiller, US 2787628 (1956, 1957, 1957 all to BASF). Toxicity study: Smyth et al., Arch. Ind. Hyg. Occup. Med. 10, 61 (1954).
Properties: Colorless, refractive liq; flammable; odor like that of amyl alcohol, but weaker. d15 0.806. bp 108°. mp -108°. Flash pt, closed cup: 82°F (28°C). nD15 1.3976. Sol in about 20 parts water; misc with alcohol, ether. LD50 orally in rats: 2.46 g/kg (Smyth).
Melting point: mp -108°
Boiling point: bp 108°
Flash point: Flash pt, closed cup: 82°F (28°C)
Index of refraction: nD15 1.3976
Density: d15 0.806
Toxicity data: LD50 orally in rats: 2.46 g/kg (Smyth)
CAUTION: Potential symptoms of overexposure are irritation of eyes and throat; headache, drowsiness; skin cracking. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 176.
Use: Manuf esters for fruit flavoring essences; solvent in paint, varnish removers.

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