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Operation of the Rotary Evaporator (Rotovap)

Operation of the Rotary Evaporator (Rotovap)

3. To close the system and thus activate the vacuum, turn the stopcock knob at the far end of the rotovap to align it with the vacuum (ie. turn until the arrow on the knob points straight down towards the attached tubing ie. knob is pointing to the “ON” position). The system is now under reduced pressure. 4.

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ETHYL ACETATE ETA - CAMEO Chemicals

ETHYL ACETATE ETA - CAMEO Chemicals

7.4 Venting: Open (flame arrester) or pressure-vacuum 7.5 IMO Pollution Category: D 7.6 Ship Type: Data not avaialable 7.7 Barge Hull Type: Currently not available 8. HAZARD CLASSIFICATIONS 8.1 49 CFR Category: Flammable liquid 8.2 49 CFR Class: 3 8.3 49 CFR Package Group: II 8.4 Marine Pollutant: No 8.5 NFPA Hazard Classification:

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Use of the Rotovap - uwindsor.ca

Use of the Rotovap - uwindsor.ca

8. Ensure that you know what pressure to lower the rotovap to based on the chart. 9. Turn on the pump, decrease the pressure to the target. 10. Use up down switch to make the flask is submerged in the bath water. 11. Turn on the rotation. 12. Adjust the speed of rotation. Note: These can be done in quick succession. It is important that vacuum

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Home Environmental Health Safety UCI

Home Environmental Health Safety UCI

A rotovap removes solvent by reducing the pressure within the flask using a vacuum, rotating the sample to increase its effective surface area, and heating the solution. The steps outlined below address general laboratory safety concerns while operating a rotovap. Modify this SOP with your laboratory’s specific operational procedures with the ...

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What Comprises a Complete Rotary Evaporator System?

What Comprises a Complete Rotary Evaporator System?

Apr 18, 2018 Glassware can break under too high a pressure, so you may want to go with a chiller whose pump has a maximum pressure output below the pressure rating of the glass. Vacuum Pump. A vacuum pump is an important part of the rotary evaporator setup because it reduces the pressure within the system.

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Supporting information - American Chemical Society

Supporting information - American Chemical Society

Aug 11, 2004 Compound 26 (~17.58 mmol) was dissolved in dry pyridine and cooled on ice. To the cooled solution was added toluene sulfonyl chloride (4020 mg, 21.10 mmol). The reaction was then stirred at 0oC overnight. After the removal of pyridine on a rotavap, the residue was dissolve in CH2Cl2 and load to a silica gel column.

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Boiling Points of Extracted Substances in a Rotary Evaporator - Rotovap

Boiling Points of Extracted Substances in a Rotary Evaporator - Rotovap

Aug 15, 2019 The boiling points of different substances vary from each other under the same pressure, as follows: Most people extract cannabis at chemical labs for pharmaceutical use, entertainment use and other uses. ... [email protected] Whatsapp +86-13783661974. After-sales service. Email [email protected] Whatsapp +86-13721449508. Latest …

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Raman and infrared spectroscopy of pyridine under high pressure

Raman and infrared spectroscopy of pyridine under high pressure

Aug 30, 2010 We report the structural transitions of pyridine as a function of pressure up to 26 GPa using in situ Raman spectroscopy and infrared absorption spectroscopy. By monitoring changes in the Raman shifts in the lattice region as well as the band profiles in both Raman and IR spectra, a liquid-to-solid transition at 1 GPa followed by solid-to-solid transitions at 2, 8, 11, …

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Pyridine (C5H5N): Structure Uses and Characteristics

Pyridine (C5H5N): Structure Uses and Characteristics

Dec 07, 2021 Pyridine has a thickness of 0.88 mPa/s and thermal conductivity of 0.166 Wm-1K-1 at 25 degrees Celsius. At normal pressure and the breaking point, the enthalpy of vaporization is 35.09 kJ/mol. At the dissolving point, the enthalpy of the combination is 8.28 kJ/mol. Pyridine has the following fundamental properties: Pressure - 6.70 MPa,

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How to Prevent Rotary Evaporator Glassware Implosion

How to Prevent Rotary Evaporator Glassware Implosion

Feb 16, 2019 As you know, rotovap systems use vacuum to reduce the boiling temperature of the solvent. However, the use of vacuum increases the risk of implosion of glassware. In this post, we take a look at the reasons why rotovap implosions occur, the dangers involved, and what you can do to prevent rotary evaporator glassware implosions and resulting ...

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What is Rotary Evaporator Working Principle? - Rotovap

What is Rotary Evaporator Working Principle? - Rotovap

Feb 27, 2019 A rotary evaporator (rotovap or rotavap) evaporates solvents from samples by utilizing the principle that the solvent will have a lower boiling point at a reduced pressure. Specifically speaking, the stepless speed regulation is adopted to make the evaporation flask rotate at a constant speed. By the rotation, materials can form a large area of ...

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The Rotary Evaporator

The Rotary Evaporator

It is commonly taught in General Chemistry classes that the vapor pressure of a liquid or solid varies directly with temperature, i.e., the higher the temperature of a substance, the higher its ... We take advantage of this in our use of the rotary evaporator or rotovap. The diagram below is a generic rotary evaporator. The essential parts are ...

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High-pressure polymorphism in pyridine

High-pressure polymorphism in pyridine

Jan 01, 2020 Single crystals of the high-pressure phases II and III of pyridine have been obtained by in situ crystallization at 1.09 and 1.69 GPa, revealing the crystal structure of phase III for the first time using X-ray diffraction. Phase II crystallizes in P2 1 2 1 2 1 with Z′ = 1 and phase III in P4 1 2 1 2 with Z′ = . Neutron powder diffraction experiments using pyridine-d 5 …

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PYRIDINE Occupational Safety and Health Administration

PYRIDINE Occupational Safety and Health Administration

Jan 28, 2021 Vapor pressure: 16 mmHg Flash point: 68F Vapor density: 2.72 Specific gravity: 0.983 at 68F ... NTP toxicology and carcinogenesis studies of pyridine (CAS No. 110-86-1) in F344/N rats, Wistar rats, and B6C3F1 mice (drinking water studies). Nat. Toxicol.

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Pressure-Temperature Nomograph Interactive Tool

Pressure-Temperature Nomograph Interactive Tool

Our Pressure-Temperature Nomograph tool is an application of the Clausius-Clapeyron equation, which assumes the heat of vaporization is a constant over a pressure range. The Antoine equation gets around this assumption by using empirical data for each unique liquid under consideration. Enter the pressure and temperature in any of five units of ...

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RD - Yam Pharma

RD - Yam Pharma

Pressure vessels (up to 20 L) ... Rotovap (20 L) Critics; Walking room inside; Fume Hoods; Brine Chiller (up to -15 C) ... pyridine, pyrimidine, purine, furan, pyrazole, isoxaz) Sponsored by search, creative and dynamic approach, the ADL RD Team of more than 50 people constantly strives to increase their awareness. Yam Pharma.

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Pyridine analytical standard 110-86-1 - Sigma-Aldrich

Pyridine analytical standard 110-86-1 - Sigma-Aldrich

Pyridine analytical standard; CAS Number: 110-86-1; EC Number: 203-809-9; find Supelco-02486 MSDS, related peer-reviewed papers, technical documents, similar products more at Sigma-Aldrich ... vapor pressure. 10 mmHg ( 13.2 C) 20 mmHg ( 25 C) assay. ≥99.9% (GC) autoignition temp. 899 F. shelf life. limited shelf life, expiry date on ...

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Pyridine C5H5N - PubChem

Pyridine C5H5N - PubChem

Pyridine | C5H5N | CID 1049 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards ...

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2-bromomethyl pyridine into 2-pyridine methanol

2-bromomethyl pyridine into 2-pyridine methanol

Pyridine-2-methanol has a BP of 110-120 at reduced pressure. Or buy some from Aldrich. 100 g runs 100 bucks. ... so you can reduce on a rotovap at …

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CDC - NIOSH Pocket Guide to Chemical Hazards - Pyridine

CDC - NIOSH Pocket Guide to Chemical Hazards - Pyridine

Pyridine. Related Pages. Synonyms Trade Names Azabenzene, Azine CAS No. 110-86-1 RTECS No. UR8400000. DOT ID Guide . 1282 129 ... Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus ...

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Rotary Evaporator Fact Sheet - UMass Amherst

Rotary Evaporator Fact Sheet - UMass Amherst

Remove and clean the bump bulb from the rotovap immediately after use to ensure ground glass joint connections do not stick together and to prevent contamination of future samples that will be rotovaped. ... significantly lower than at ambient pressure (examples in the table below): Solvent b.p. (760 torr) b.p. (40 torr) acetonitrile 81.8 . o ...

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65001-21-0 Pyridine-derivatives

65001-21-0 Pyridine-derivatives

Sep 29, 2021 Here is a downstream synthesis route of the compound, 65001-21-0, blongs to pyridine-derivatives compound. Safety of 5-Bromopyridine-3-sulfonyl chloride Crude 5 -bromopyridine-3-sulfonyl chloride from step 1 above was dissolved in THF (14 L, 8 vol) and then transferred to a 20 L RB flask equipped with mechanical stirrer under inert atmosphere.

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Solvent Boiling Points Chart - BrandTech Scientific Inc.

Solvent Boiling Points Chart - BrandTech Scientific Inc.

Solvent Boiling Points Chart (all boiling points at standard pressure) Solvent Boiling Point (C) Solvent Boiling Point (C) Acetic Acid 118.0 Ethyl Acetate 77.1 Acetic Acid Anhydride 139.0 Ethyl Ether 34.6 Acetone 56.3 Ethylene Dichloride 83.5 Acetonitrile 81.6 Ethylene Glycol 197.5 Benzene 80.1 Heptane 98.4 iso-Butanol 107.7 n-Hexane 68.7 n-Butanol 117.7 Hydrochloric …

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Pyridine - NIST

Pyridine - NIST

Temperature (K) A B C Reference Comment; 340.5 - 426.04: 4.16272: 1371.358-58.496: McCullough, Douslin, et al., 1957, 2: Coefficents calculated by NIST from author's ...

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Pyridine - NIST

Pyridine - NIST

Temperature (K) A B C Reference Comment; 340.5 - 426.04: 4.16272: 1371.358-58.496: McCullough, Douslin, et al., 1957: Coefficents calculated by NIST from author's data.

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Pressure-induced fluorescence of pyridine

Pressure-induced fluorescence of pyridine

Two-photon excitation profiles and fluorescence spectra have been measured as a function of pressure in a diamond anvil cell up to 15.5 GPa in crystal phases I and II and in the glassy form of pyridine. The fluorescence emission intensity increases by about 6 orders of magnitude in going from the li …

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Standard Operating Procedures: Bart Laboratory

Standard Operating Procedures: Bart Laboratory

Using Rotovap 17-18 Preparation of UI 3 19-20 Preparation of UCl 4 21-22 ... pressure in the chamber will rise to atmospheric pressure. Turn the valve to “closed” and open ... (especially pyridine) Emergency Glove Isolation: In the event of a large hole opening in a glove during work (due to broken glass, for example), ...

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Spiroindolines Supporting Information v5 Revisions

Spiroindolines Supporting Information v5 Revisions

were subsequently removed by Vigreux column distillation at atmospheric pressure (no rotovap!) and the crude material purified by vacuum distillation via Vigreux column (Bp. 58 C, 50 mbar, receiver ... and pyridine (2.5 ml) in anhydrous Et 2O (150 ml) was cooled to -30 C and PBr 3 (10.3 ml, 29.4 g, 109 mmol, 0.5 eq.) was added via syringe ...

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