Detail of "58086-67-2"

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Assessment of alcohol ethoxylate surfactants and fatty alcohols mixtures in river sediments and prospective risk assessment

All Rights Reserved. Assessment of alcohol ethoxylate surfactants and fatty alcohols mixtures in river sediments and prospective risk assessment. Dyer, Scott D.; Sanderson, Hans; Waite, Scott W.; Van Compernolle, Remi; Price, Bradford; Nielsen, Allen M.; Evans, Alex; Decarvalho, Alvaro J.; Hooton, Dennis J.; Sherren, Andrew J. (Environment Safety, US Soap and Detergent Association, Washington, DC, USA). Environmental Monitoring and Assessment, 120(1-3), 45-63 (English) 2006 Springer. CODEN: EMASDH.Chemicals with cas numbers 58086-67-2 and 7440-44-0 also play role. ISSN: 0167-6369. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 4, 46, 53, 60 A feasible and relatively readily available anal. method was adapted for the assessment of alc. ethoxylates (AE) and fatty alcs. (FA) in sediments. This study illustrates the simultaneous measurement of 38 of 114 possible alc. ethoxylate ethoxymers (AE) and fatty alcs. (FA) found in com. important AE products. We predicted toxicity for all identified fractions, as well as the total mixt. toxicity, relative to three exposure scenarios via sewage treatment plants (STP) for these widely used chems. in consumer products and hence generate a preliminary environmental risk screening for AE and FA in sediments. The method is based on derivatization of solvent or solid-phase exts. with 2-fluoro-N-methylpyridinium p-toluenesulfonate (Pyr+). The derivatized exts. were analyzed with liq. chromatog./mass spectrometry (LC/MS) operating in the pos. ion electrospray mode. The extn. efficiency of AE and FA in three different sediments of varying compn. was evaluated with spike-recovery studies, ranging from 64% to 80%. The detection limits for individual ethoxymers typically ranged from 1 to 5ngg-1on a dry wt. basis. The mean limit of detection (LOD) was 6ngg-1and the median LOD was 3ngg-1. AE and FA in sediments were found to be stable for two weeks if preserved with 3% (vol./vol.) formalin and stored at 4-6 C. Based on equil. partitioning, background concns. of AE and FA were predicted to be below concns. known to elicit chronically toxic effects. Total worst case mixt. toxicities for all AE ethoxymers combined with FA were predicted to result in a risk quotient less than 0.6. Activated sludge treatment (STP) significantly reduced the release of total AE and FA by four-fold, suggesting that the total mixt. risk quotient would be < 0.15 for sediment dependent organisms. .

Preparation of activated polyamide microporous membranes for affinity separation of biological materials

Preparation of activated polyamide microporous membranes for affinity separation of biological materials. Klein, Elias; Feldhoff, Pamela A. (USA ). Eur. Pat. Appl. EP 441660 A1 14 Aug 1991,16 pp. DESIGNATED STATES: R: AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LI, LU, NL, SE. (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: B01D071-56. ICS: B01D071-08; B01D067-00. APPLICATION: EP 91-301089 11 Feb 1991.In this article, certain chemicals are used. Some of their cas registry numbers are 58086-67-2 and 50-99-7 PRIORITY: US 90-477512 9 Feb 1990. DOCUMENT TYPE: Patent CA Section: 9 (Biochemical Methods) Section cross-reference(s): 38 Affinity membranes, useful for the sepn. of biol. materials, esp. proteins, are prepd. by activation of microporous polyamide films with imidazole derivs., pyridinium sulfonate derivs., or trichlorotriazine (I) or I derivs., followed by covalently binding to polysaccharide, and further including ligand adapted for affinity sepn. Thus, nylon 390 membrane was activated with 1% I in a Me2CO-Et3N solvent system for 15 min-16 h, dried with Me2CO, and reacted with polyglucose M-100 to give amplified membrane contg. 294 mmol glucose/g fiber. Then, Cibacron Blue dye was attached as a ligand to a trichlorotriazine-generated polyamide composite membrane, and then used to recover bovine serum albumin, showing a recovery mean value of 0.14 mmol bovine serum albumin/g membrane. .