Biodegradation and toxicity to fish of di-long-chain tertiary amine salt containing ester and amide bonds.
Biodegradability of N-(3-alkanoylaminopropyl)-N-(2-alkanoyloxyethyl)-N- methylammonium chloride (EAA) was investigated. Biodegradabilities by biochemical oxygen demand (BOD) and dissolved organic carbon (DOC) after 28 days were 79 and 91%, respectively, and almost the same amount of ammonium ion as the theoretical value was detected using a modified MITI test (I) (OECD guidelines, 301C). In the test with activated sludge obtained from a municipal sewage treatment plant, biodegradabilities by BOD and DOC after 35 days were 87 and 98%, respectively, and the 1H-NMR analysis of the tested solution which was done separately under similar conditions indicated the rise and fall of two biodegradation intermediates. Therefore, EEA was considered to be a readily and ultimately biodegradable compound. Besides, the 96-hr LC50 value in red killifish (Oryzias latipes) of EAA was 66 mg/liter. More than 1000 mg/liter was of biodegradation intermediates rapidly made by biodegradation of EAA. These results reveal that EAA has sufficient environmental compatibility.
Toshima
Y
Y
Biological Science Laboratories, Kao Corporation, Tochigi, Japan.
Katoh
T
T
Nishiyama
N
N
Tsugukuni
T
T
Saito
F
F
D000818:Animals; D001673:Biodegradation, Environmental; D009930:Organic Chemicals; D009990:Oryzias / Q000378:metabolism*; D011437:Propylamines / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000378:metabolism* / Q000633:toxicity*; D013501:Surface-Active Agents / Q000378:metabolism* / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000378:metabolism* / Q000633:toxicity*; D015091:beta-Alanine / Q000031:analogs & derivatives / Q000378:metabolism
C091412:N-(2-hydroxyethyl)-N-methyl-1,3-propanediamine; C091413:N-(2-hydroxyethyl)-N-methyl-beta-alanine; D009930:Organic Chemicals; D011437:Propylamines; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C010153:fabric softeners; D015091:beta-Alanine