title: 7-Amino-2,4,6-trimethylquinoline as a mutagenic pyrolysate compound of polyurethane foam.
abstract: Commercial polyurethane foam was pyrolyzed by gas burners at 600-700 degrees C for 2 h with introduction of air (200 ml/min). Gaseous pyrolysate was trapped in water and 10% hydrochloric acid. Basic and neutral pyrolysates have a mutagenic activity (447 revertants/10 micrograms) in Salmonella typhimurium TA98 in the presence of a mammalian metabolic activation system. These pyrolysates contained 12.32 mg of amino compounds as diaminotoluene per g polyurethane foam, amounts which are 120 times higher than those in unpyrolysed polyurethane foam. Basic and neutral pyrolysates were subjected to silica gel column chromatography, and 6 fractions having mutagenic potency were obtained. The colorless needles (m.p. 200.5-202 degrees C) were separated from fraction 4. These needles have the most potent mutagenicity (678 revertants/2 micrograms) in basic and neutral pyrolysates in Salmonella typhimurium TA98 with 10% S9 mix. From the physicochemical data, the structure of the compound was estimated to be an aminoquinoline derivative, and was identified using synthesized 7-amino-2,4,6-trimethylquinoline by mixed melting point, thin-layer co-chromatography and gas chromatography-mass spectrometry.
authors.affiliation: Kyoto Pharmaceutical University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Hirayama
authors.forename: T
authors.initials: T
authors.lastname: Watanabe
authors.forename: M
authors.initials: M
authors.lastname: Ono
authors.forename: Y
authors.initials: Y
authors.lastname: Fukunaga
authors.forename: S
authors.initials: S
authors.lastname: Fukui
mesh_terms: D000634:Aminoquinolines / Q000138:chemical synthesis / Q000493:pharmacokinetics / Q000633:toxicity*; D001711:Biotransformation; D055598:Chemical Phenomena; D002621:Chemistry; D002845:Chromatography; D003252:Construction Materials; D006358:Hot Temperature; D009152:Mutagenicity Tests; D009153:Mutagens / Q000493:pharmacokinetics; D010655:Phenylenediamines / Q000032:analysis / Q000633:toxicity; D011140:Polyurethanes / Q000493:pharmacokinetics / Q000633:toxicity*; D012486:Salmonella typhimurium / Q000235:genetics
chemical_list: D000634:Aminoquinolines; D009153:Mutagens; D010655:Phenylenediamines; D011140:Polyurethanes; C060429:7-amino-2,4,6-trimethylquinoline; C028279:polyurethane foam; C025235:2,6-diaminotoluene; C010914:2,4-diaminotoluene