Theophylline (pKa 8.63, melting point 271–273 °C) is a drug containing xanthine scaffold used for treating respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma. The poor water solubility (8.3 mg/mL) hinders its parenteral use, and hence to overcome these ...
Melting point 145-146°C Fp 9℃ storage temp. Controlled Substance, -20°C Freezer solubility DMSO (Slightly), Water (Slightly) form solid Merck 13,4840 CAS DataBase Reference 502-85-2(CAS DataBase Reference) EPA Substance Registry System Butanoic acid, 4-hydroxy-, monosodium salt (502-85...
The first determination of the melting point of sodium thiosulphate pentahydrate with the high accuracy was performed by Richards and Churchill [132] in their investigation of transition temperatures of several salt hydrates. The melting temperature of STP was found to be 48.0 °C. The calorimetric ...
Melting point 320 °C bulk density 600kg/m3 Density 0.579[at 20℃] vapor pressure 2.133hPa storage temp. Store at +5°C to +30°C. solubility H2O: soluble1mg/mL pka 2.2, 4.4, 6.7(at 25℃) Colour Index 45350 form Powder color Rust-orange Odor Odorless PH 8.3 (10g...
NaNO3, a salt; colorless crystals. Density, 2.257 g/cm3; melting point, 308°C (decomposes into NaNO2and O2at higher temperatures). Solubility in water, 47.6 percent at 25°C and 64.3 percent at 100°C. It is a strong oxidizing agent. Sodium nitrate occurs naturally as Chile saltpeter. ...
Method B, Absorbance ratio method (Q-method) involves formation of Q-absorbance equation at 302.80 nm (isoabsorptive point) and 280.00 nm (λmax of Diclofenac Sodium) in zero order spectra. Developed methods were validated according to ICH guidelines. The calibration graph follows Beer's law in...
The resistivity-temperature graph for zero fields shows that the residual resistivity values ( ρ 0 ) gradually drop 44.35 mΩcm to 0.81 mΩcm, while the T c offset values tend to grow routinely from 71.1 K to 77.1 K with the Na–Li-content. All samples containing Na and Li possess ...
Fracturing graphene by chlorination: a theoretical viewpoint Motivated by the recent photochlorination experiment [B. Li et al., ACS Nano 5, 5957 (2011)], we study theoretically the interaction of chlorine with graph... M. Ijas,P Havu,A Harju - 《Physical Review B Condensed Matter》 被引...
In the bottom graph, the first injection step added rotenone (1 μM final) in addition to sulfide. First, the sulfide injection caused a large dilution artifact with an immediate drop in the oxygen concentration reported by the detector. Second, when cellular respiration resumes after sulfide ...
Lead is proposed for use in anLFRat pressures close to ~0.1MPa. Lead has ahigher melting point(327.5°C) and significantly higher boiling point (1750°C) compared to that of sodium, which significantly impacts on the reactor. Also, it is a more inert liquid metal than sodium. As a resul...