2-butanol Search Term: 2-butanolSource Category: ASSIST2-butanol is on the Recommended Chemicals list for Australian schools. Synonyms: 2-butyl alcohol, 2-hydroxy butane, butan-2-ol, sec-butanol, sec-butyl alcohol; CAS Number: 78-92-2; Signal Word: Warning. Tags: 2-butyl alcohol2-hydroxy butanebutan-2-olsec-butanolsec-butyl alcohol78-92-2