Herein, we wish to report the synthesis of 3, 4dihydro-3-substituted-2H-naphtho [2,1-e][1,3] oxazine derivatives promoted by potassium dihydrogen
phosphate as a catalyst (Scheme 1).
It's not as bad as it sounds: dihydrogen
monoxide is the chemical name for water.
But the toxin in question -- the scary-sounding "dihydrogen
monoxide" -- is in fact ...
Altun (2002) used 0.01 M potassium dihydrogen
phosphate-methanol-acetonitrile-isopropyl alcohol (84: 4: 6: 6) mobile phase.
In the current work, the raw materials for the MPC formation were dead-burnt magnesia (MgO, Liaoning Xinrong Mining Co., Ltd., China) obtained by calcinating magnesium carbonate at 1700[degrees]C, and analytically pure ammonium dihydrogen
phosphate (ADP, AR-grade, Jinshan Chemical Reagent Co., Ltd., Chengdu, China) and quartz powders were prepared by ball-milling quartz for 30 min.
35% (w/v) sodium dihydrogen
phosphate was diluted by the supernatant and the solution pH was adjusted to 5 by 10% of HCL and 0.1 M NaOH solutions in a test tube.
The equilibria solid phase remains the same, and only anhydrous potassium nitrate and potassium dihydrogen
phosphate exist as solid phases.
orthophosphate 0.05 M solution was prepared by dissolving accurately 40.8 gm in about 5.0 L purified water using 6.0 L volumetric flask, the pH of this solution was adjusted using sodium hydroxide dilute solution and diluted to 6.0 L using purified water.
- El Cajon, California-based silver dihydrogen
citrate (SDC) antimicrobial creator PURE Bioscience, Inc.
Its technology is based on patented stabilized ionic silver and its initial products contain silver dihydrogen
citrate, or SDC, a broad-spectrum, non-toxic antimicrobial agent that offers 24-hour residual protection and formulates with other compounds.
Name Chemical formula Zinc phosphate [Zn.sub.3][(P[O.sub.4]).sub.2] Potassium dihydrogen
K[H.sub.2]P[O.sub.4] phosphate Sodium hydrogen phosphate [Na.sub.2]HP[O.sub.4] Ammonium phosphate (N[H.sub.4]P[O.sub.3])n Trichloroethyl phosphate [C.sub.6][H.sub.12][Cl.sub.3][O.sub.4]P Diphenyl hydrogen phosphate [C.sub.12][H.sub.11][O.sub.4]P Name Purity Manufacturer Zinc phosphate >99% Sinopharm Group Co., Ltd.
Orphenadrine citrate also known as dimethyl [2-(2-methylbenzhydrylox ethyl] amine dihydrogen
citrate (Fig: 3).
It was noticed that with Zorbax Eclipse XDB C8 (4.6 x 150 mm, 5 m) column and recommended mobile phase comprising acetonitrile - methanol - potassium dihydrogen
phosphate (22+34+44 v/v), the desired results obtained were not according the chromatograms provided by European Pharmacopeia (EP), but by using another column (ACE 5 C8) (4.6 x 150 mm, 5 m), an extra peak of diazepam degradant was obtained, which showed that by using appropriate mobile phase containing CH3CN- CH3OH- KH2PO4 (20+32+48 v/v), the better results can be achieved.
Scientists are developing silver dihydrogen
citrate (SDC) as an antimicrobial for direct food contact.
Initially inorganic sodium acid phosphate in the form sodium dihydrogen
phosphate and ATP Stimulators (Novizaca) @ 25ml of reconstituted solution was administered intravenously and also same dose subcutaneously.