Removing a hydrogen atom from the first isomer can result in the formation of two different butyl groups, one designated as n-butyl, and the other as sec-butyl (secondary butyl). The structure of the n-butyl group is CH 3 CH 2 CH 2 CH 2 - ; the structure of the sec-butyl group is 2 CH 3 CH CH(CH - 3 ) .
The boiling points of the butyl alcohols decrease regularly in moving down the above list, from 244°F (118°C) for n-butyl alcohol to 226°F (108°C) for isobutyl alcohol to 212°F (100°C) for sec-butyl alcohol to 180°F (82°C) for tert-butyl alcohol.
Basis for revised IDLH: The revised IDLH for sec-butyl alcohol is 2,000 ppm based on acute inhalation toxicity data in animals [Weese 1928]. This value also approximates 10% of the lower explosive limit (LEL) of 1.7% (which was determined at 212 F) and the revised IDLH for n-butyl alcohol. 2-Butanol, or sec-butanol, is an organic compound with formula CH 3CH(OH)CH 2CH 3 . This secondary alcohol is a flammable, colorless liquid that is soluble in 3 parts water and completely miscible with organic solvents. It is produced on a large scale, primarily as a precursor to the industrial solvent methyl ethyl ketone.
sec-Butyl alcohol is a secondary (2º) alcohol, and is easily oxidized. 2-Butanol is a chiral compound, and exists in two enantiomeric forms: (R)-2-butanol and (S)-2-butanol: The 3D structure shown above is the R stereoisomer. RNAi, Oligos, Assays, Gene Editing & Gene Synthesis Tools Oligos Tools. Eurofins MWG Operon Oligos Tool Butyl group. In organic chemistry, butyl is a four-carbon alkyl radical or substituent group with general chemical formula −C 4H 9 , derived from either of the two isomers of butane. sec-Butyl Alcohol; CAS Number: 78-92-2; Synonym: sec-Butyl Alcohol, 2-Butanol; Linear Formula: CH3CH2CH(OH)CH3; find Supelco-BX1795 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich.