Our Products

Rotary Evaporator

Laboratory equipment

Jacketed Reactor

Contact Us

We Cherish All Interactions

What is THCA Crystalline and How it is Made | Seedsman Blog

Oct 26, 2018 · The initial wash and extraction is usually done using hydrocarbon hexane and acetic acid, which can be thought of as a kind of super-concentrated vinegar. . which can be easily filtered out through another round of rotovap. Important to note is the fact that crystalline THCA is still inactive as it does not share the same psychotropic .

How to clean a rotovap bath? : chemistry

Citric acid, oxalic acid, formic acid, vinegar. In the lab, you probably have access to glacial acetic acid, so you can make a concentrated solution, which works pretty fast. You could use strong acids of course, but they might damage the metal the bath is made of if you leave them in there too long.

JW Oxidation Of Cyclohexanol Lab 2 and lab 3 reduction of .

Study JW Oxidation Of Cyclohexanol Lab 2 and lab 3 reduction of cyclohexanone flashcards from John Walker's cua class online, or in Brainscape's iPhone or Android app. Learn faster with spaced repetition.

Operation Manual Rotavapor R 210/215 - Marshall Scientific

Acetic acid C 2 H 4 O 2 60.0 695 118 1.049 44 Ethanol C 2 H 6 O 46.0 879 79 0.789 175 Ethylacetate C 4 H 8 O 2 88.1 394 77 0.900 240 Heptane C 7 H 16 100.2 373 98 0.684 120 Hexane C 6 H 14 86.2 368 69 0.660 360 Isopropylalcohol C 3 H 8 O 60.1 699 82 0.786 137 .

Acid-Base Solubility Tests: - Wellesley College

Acid-Base Solubility Tests: [Please write a general chemical reaction(s) for any positive solubility test result(s) that you obtain for your unknown compound. Your reaction should demonstrate how any organic compound with a specific functional group can dissolve/react in an aqueous solution.

Anyone familiar with HPLC/Acetonitrile Solvent Removal?

Use formic acid during HPLC to substitute TFA or, doing it with HCl after lyophilization. The easiest way is using a PTFE coated, -84C lyophilize. In this way, you can directly freeze dry water/ACN.

Extraction and Determination of a Distribution Coefficient .

Jul 19, 2011 · Let's say you did this lab and collected the following data: 0.61g benzoic acid in 250.0 mL water = 0.020 M aqueous solution of benzoic acid 1st extraction: 10.5 mL 0.020 M aq. NaOH needed to titrate benzoic acid remaining in aqueous layer after one 10 mL dichloromethane extraction. 2nd extraction: 8.0 mL 0.020 M aq. NaOH needed to titrate .

CHEM LAB FINAL Flashcards | Quizlet

50.00 mL of a 0.250 M acid is combined with 50.00 mL of 0.255 M NaOH. Before the reaction, the acid and base are at a temperature of 24.92 °C. After mixing, the neutralized solution reaches a maximum temperature of 26.50 °C in a calorimeter (Ccal=58.4 J/°C). The neutralized solution has a specific heat of 3.89 J/g°C and a density of 1.04 g/mL.

Acetic Acid - Common Organic Chemistry

Acetic Acid - Common Organic Chemistry

Extraction and Washing Guide - MIT OpenCourseWare

An acid wash (usually 10% HCl) is used to remove amines, while a basic wash (usually sat. NaHCO3 or 10% NaOH) is used to remove unwanted acids. In most . rotovap), then return to the pump (or rotovap) for 15 to 30 minutes and weigh again. Once two weights in a .

Putting the Rule of 20 Into Practice | Blog | Rotovaps.net

Solvent. Vacuum [mbar] for bp of 30°C. Vacuum [mbar] for bp of 40°C. Vacuum [mbar] for bp of 50°C. Acetic acid. 26. 44. 72. Acetone. 370. 556. 815. Acetonitrile. 153

How can the rotary evaporator be used safely? - Rotovap

The vacuum degree is the most important process parameter of rotary evaporator, and the users often encounter the problem that the vacuum degree cannot reach, which is often related to the properties of the solvent used.The biochemical pharmaceutical industry often uses acetic acid, ethanol, propanol, ethyl ester, diethyl ether, petroleum ether .

Trifluoroacetic Acid (TFA) - Common Organic Chemistry

TFA is the CF3 analogue of acetic acid which due to the electron withdrawing effect of the fluorine atoms is much more acidic than AcOH. The pKa of TFA is 0.23, compared to a pKa of 4.76 for AcOH. The low boiling point (bp = 72 C) of TFA facilitates simpler product isolation due to the fact that it can be removed via concentration on rotovap.

Rotary Evaporator Only Information

3 temperatures, but it is a general recommendation to help give an idea of the temperatures for the rotary evaporator. Many manufacturers do not recommend a water bath temperature higher than 60 .

US Patent Application for POLY((LACTIC-CO-GLYCOLIC ACID)-B .

Jul 13, 2012 · 30. 5 mL Hbr/acetic acid was added to dissolve the thin polymer film with a stir bar stirring at 300 rpm and yielded a cloudy yellow solution. 31. The top of the flask was covered with a rubber stopper and allowed to react for 90 minutes+/−5 minutes. . The rotovap was run for 30 minutes at the final pressure of 20 mm Hg.

Isolation of Cottonseed Extracts That Affect Human Cancer .

Jul 11, 2018 · The supernatant was concentrated in a rotovap and residual acetic acid and ethanol was removed by rotoevaporation using an Integrated SpeedVac System or freeze-drying at .

How to use a Rotary Evaporator

To remove algae gunk from the inside of a coiled water condenser, the condenser has to be removed from the rotavap and the coil is soaked in a dilute nitric acid solution for a few hours. After carefully rinsing the insides, the rotavap is reassembled. All standard safety precautions should be followed when working with nitric acid!

Solved: Orgicn Chem II QUESTION 5 Please Watch The Short V .

Answer to orgicn chem II QUESTION 5 Please watch the short video below about operating the rotovap and answer the question(s) that. Skip Navigation. Chegg home. Books. Study. Textbook Solutions Expert Q&A Study Pack. Writing. . A ethanol B. acetone H3CCHE C. acetaldehyde .D. acetic acid O-H E. none of the above QUESTION 7 Given that the .

C251.03 Lab -- Frontalin Project

In another system, containing both ketal and TBDMS protecting groups, I was able to remove them both by heating at 60 °C for 5 hours in 80% acetic acid/water. Under these conditions the ketal protecting group was removed quickly (in about an hour) but the TBDMS group (in the case I was looking at it was a secondary alcohol) took longer.

Honors Cup Synthetic Proposal - University of Michigan

hydrochloric acid in a 50-mL round bottom flask. Attach a condenser and reflux for 25-30 minutes. Cool the mixture and add half its volume of cold water. Make the solution slightly basic (pH 7-8 measured with wide-range pH paper) with 10% aqueous ammonia. For each 30 mL of solution, add 1 mL glacial acetic acid.

How to use a Rotary Evaporator

To remove algae gunk from the inside of a coiled water condenser, the condenser has to be removed from the rotavap and the coil is soaked in a dilute nitric acid solution for a few hours. After carefully rinsing the insides, the rotavap is reassembled. All standard safety precautions should be followed when working with nitric acid!

Use of the Rotovap - University of Windsor

These include: pyridine, water, TFA, acetic acid, acetic an-hydride, OR ANY OTHER ACIDIC or BASIC solvent that might destroy someone else's product. Note: Normally we use Acetone as the washing agent, however if your com-pound has a bad smell (thiol or amine), use Bleach. If you unsure how to clean the rotovap, please ask Trant, or Reynolds. 20.

ORGO LAB EXAM 1 PROFETA Flashcards | Quizlet

Explain why DCM has a higher dielectric constant than acetic acid. acetic acid has an intra-molecular H-bond that engages partial charges and affects dialectic behavior. . 1. evaporate using rotovap 2. adding MgSO4 3. hot water bath, allows it to evaporate.

Freeze-drying - Wikipedia

Freeze drying, also known as lyophilisation or cryodesiccation, is a low temperature dehydration process that involves freezing the product, lowering pressure, then removing the ice by sublimation. This is in contrast to dehydration by most conventional methods that evaporate water using heat. Freeze drying results in a high quality product because of the low temperature used in processing.

What Is A Rotovap / Rotary Evaporator Used For? - WKIE LAB

The Importance of Rotovap In the Experiment. Rotary evaporation is applied regularly and is useful for separating "low boiling" solvents, such as the derivation of n-hexane or ethyl acetic acid from potent mixtures at room temperature and pressure.

Extraction and Washing Guide - MIT OpenCourseWare

An acid wash (usually 10% HCl) is used to remove amines, while a basic wash (usually sat. NaHCO3 or 10% NaOH) is used to remove unwanted acids. In most . rotovap), then return to the pump (or rotovap) for 15 to 30 minutes and weigh again. Once two weights in a .

An efficient metal catalyst free approach to synthesize 5 .

Aug 08, 2018 · The yellow slurry obtained during step 2 of compound 2 synthesis was dissolved with glacial acetic acid. Addition of sodium nitrite yielded a bright pink compound and significant amount of gas liberation. However the removal of glacial acetic acid from reaction by rotavap required the use of relatively high temperature.

Fisher Esterification--Help Please? | Yahoo Answers

Mar 30, 2008 · In my orgo lab, we performed a fisher esterification. after refluxing the reaction mixture, its was cooled and ether was added. then, solid potassium carbonate was added. This nuetralized acetic acid in solution and gave off water and carbon dioxide. it also nuetralized sulfuric acid in solution. we then proceeded to dry, gravity, rotovap, blah blah..

Erowid Chemistry Vaults : Organic Solvents Table of Properties

Notes: "M" in the water solubility column means completely Miscible in water. The values in the table below except for relative polarities have been extracted from MSDS compilations (see section II-B-4 of the Chemistry Webercises Directory) or the ChemFinder Web Server.Values for relative polarity have been extracted from: Christian Reichardt, Solvents and Solvent Effects in Organic Chemistry .

Acetic acid from vinegar. A better method, Hive .

Acetic acid from vinegar. A better method . Not including the ten minutes it took to rotovap off the alcohol. Of course if one were to use a 1L+ sep funnel, you could easily process 2-3 gallons per hour or more. I didn't say this was the only fucking way to do it and it by far the best. I'm just sharing it becasue it is a lot quicker for .