A method for purifying ceftizoxime sodium, comprising (1) dissolving crude ceftizoxime sodium in water, extracting with cyclohexane or ethyl acetate, and acquiring an aqueous phase having ceftizoxime sodium; (2) introducing ammonia or ammonium hydroxide, stirring, filtering, and optionally heating to re...
Ethyl acetate structure CAS No. 141-78-6 Chemical Name: Ethyl acetate Synonyms EtOAc;ETOH;ALCOHOL;yisuanyizhi;ETHYL ETHANOATE;ACETIC ACID ETHYL ESTER;ETHANOL ABSOLUTE;METHYLATED SPIRIT;CH3COOC2H5;ACETIC ETHER CBNumber: CB7255315 Molecular Formula: ...
Whey is just turning from a waste of milk processing to a renewable raw material in biotechnology for producing single-cell protein, bio-ethanol, or ethyl acetate as an economic alternative. Conversion of whey-borne sugar into ethyl acetate requires yeast biomass as a biocatalyst. A high cell c...
Stage #2: ethyl acetate With boron trifluoride diethyl etherate In tetrahydrofuran; hexane at -78℃; for 0.5h; Inert atmosphere;Stage #3: With water; ammonium chloride In tetrahydrofuran; hexane at -78 - 20℃; 96% Stage #1: phenylacetylene With n-butyllithium In tetrahydrofuran; hexane at -...
Chromatographic separation was performed on a C column by isocratic elution with acetonitrile and 5mM ammonium acetate containing 0.03% ammonium hydroxide (70:30, ), at a flow rate of 0.3mLmin. MS detection was performed on an API 3000 triple quadrupole mass spectrometer operating in ESI positive...
Ethyl acrylate manufacturers Ethyl acrylate $100.00/ 25KG 2024-10-31 CAS:140-88-5 Min. Order: 1KG Purity: 99%min Supply Ability: 50tons Ethyl Acrylate $0.00/ 200kg 2024-10-29 CAS:140-88-5 Min. Order: 20kg Purity: 99.5% Supply Ability: 20 tons ...
The crude residue was purified by column chromatography, (petroleum ether: ethyl acetate 1:1) to afford 0.25 g (36% yield) of the title compound. 1H NMR (300 MHz, DMSO-d6 + TFA): 7.17 (t, 1 H), 6.61 - 6.89 (m, 3 H), 3.94 (t, 2 H), 3.56 (s, 2 H), 3.47 (s, 3 ...
With acetonitrile/5 mmol/L ammonium acetate solution as the eluent and 1 mL/min as the flow rate on a C18 column, the derivatives were eluted at 10.6 and 14.8 min. Good linearity (correlation coefficients > 0.999) and low limits of quantitation (0.6 ppm) were obtained. The recoveries were...
Methylbenzylamine Ammonium hydroxide NDSB-195 [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide 2-(Dimethylamino)ethyl methacrylate NDSB-211 Choline hydroxide 2-(Dimethylamino)ethyl acrylate Cholinebisulfite COL ACETATE N-(2-ACRYLOYLOXYETHYL)-N,N-DIMETHYL-N-(3-SULFOPROPYL)AMMONIUM BETAINE...
NH4OAc ammonium acetate t triplet s singlet d doublet q quartet m multiplet bs broad singlet Preparation of Staring Material 2-{[2-(4-Hydroxyphenyl)ethyl]thio}-3-[4-(2-{4-[(methylsulfonyl)oxy]phenoxy}-ethyl)phenyl]propanoic acid (i) Methyl 2-chloro-3-[4-(2-hydroxyethyl)phenyl]propano...