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Acetonitrile for HPLC gradient grade = 99.9 75-05-8

Acetonitrile for HPLC gradient grade = 99.9 75-05-8

Acetonitrile (MeCN) is widely employed as a solvent in various studies and has high dielectric constant (37.5). Various purification procedures to obtain different grades of acetonitrile for use in different studies (polarography, spectroscopy, etc.) have been reported by many researchers.

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Acetonitrile - Property Summary

Acetonitrile - Property Summary

Acetonitrile CAS RN: 75-05-8 Property Summary. Autoignition Temperature: 975 deg F (524 deg C) Boiling Point: 81.6 deg C at 760 mm Hg Density Specific Gravity: Specific gravity: 0.78745 at 15 deg C/4 deg C Flash Point: 42 deg F (6 deg C) (Open Cup) Melting Point: -44 deg C Molecular Formula: C2-H3-N ...

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SAFETY DATA SHEET - Fisher Sci

SAFETY DATA SHEET - Fisher Sci

Acetonitrile Revision Date 24-Dec-2021 Eye Contact Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Immediate medical attention is required. Skin Contact Wash off immediately with plenty of water for at least 15 minutes. Immediate medical attention is required. Inhalation Remove to fresh air. If breathing is irregular or stopped, …

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Solvent Recycling and Azeotropes

Solvent Recycling and Azeotropes

Another common binary azeotrope found in solvent recycling is acetonitrile and water. This is a common mixture used for HPLC analysis. Acetonitrile boils at 81.6 C and water boils at 100 C. The mixture forms an azeotrope which boils at 76.1 C and which is composed of 86% acetonitrile and 14% water. There are also azeotropes between three ...

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Failures and Troubleshooting of a Rotary Evaporator - Rotovap

Failures and Troubleshooting of a Rotary Evaporator - Rotovap

Aug 08, 2019 A rotary evaporator is an indispensable equipment for evaporation, concentration, crystallization, drying, separation, and solvent recovery in many fields, and it is mainly used for continuous distillation of large amounts of volatile solvents under reduced pressure. Giving consideration to its importance, it’s necessary to learn something about …

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Failures and Troubleshooting of a Rotary Evaporator - Rotovap

Failures and Troubleshooting of a Rotary Evaporator - Rotovap

Aug 08, 2019 The temperature display shows “Er-1”,ALM1 identifier lights: The bath of temperature measurement sensor short circuit or open circuit. ... [email protected] Whatsapp +86-13783661974. After-sales service. Email [email protected] Whatsapp +86-13721449508. Latest Posts. 10 Sep. How to use Home Oil Press? 24 Aug.

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Fact Sheet: Controlling Chemical Vapors in the Laboratory

Fact Sheet: Controlling Chemical Vapors in the Laboratory

Dec 17, 2021 If your rotovap is on the benchtop, you must evaluate the potential hazards and/or odors of the solution to determine if it is necessary to do the work inside the fume hood. ... The temperature at which the vapor pressure of a liquid is equal to atmospheric pressure is known as the boiling point temperature. ... Acetonitrile (73 mmHg) Danger ...

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Fact Sheet: Controlling Chemical Vapors in the Laboratory

Fact Sheet: Controlling Chemical Vapors in the Laboratory

Dec 17, 2021 The best control for limiting exposure to chemical vapor in the lab is a properly operating chemical fume hood or glove box. Point exhausts (e.g. exhaust snorkels) may be effective controls for some chemical vapors, but a risk assessment must be done to determine whether a point exhaust will be sufficient. Keeping containers well sealed during transport and …

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Acetonitrile for HPLC gradient grade = 99.9 75-05-8

Acetonitrile for HPLC gradient grade = 99.9 75-05-8

General description. Acetonitrile (MeCN) is widely employed as a solvent in various studies and has high dielectric constant (37.5). Various purification procedures to obtain different grades of acetonitrile for use in different studies (polarography, spectroscopy, etc.) have been reported by many researchers.

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Alternative to Rotovap Distillation - Rollitup

Alternative to Rotovap Distillation - Rollitup

Jan 01, 2015 Well-Known Member. Jan 1, 2015. #1. Ok, so we know that with apparatus such as a rotovap using vacuum and heat one can relatively selectively boil off terpenes, thus fractionally distilling a concentrate. What say we flip this upside down. We go to cryo temps of -170f, hypothetically locking up all / most compounds, then each column wash would ...

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A Versatile Method of Ambient-Temperature Solvent Removal

A Versatile Method of Ambient-Temperature Solvent Removal

Jan 17, 2020 In order to evaluate the performance (distillation rate) of the described method, four solvents were selected (their normal boiling points are in parentheses): water (100 C), DMF (153 C), DMSO (189 C), and N-methylpyrrolidone, NMP (202 C).The three non-aqueous solvents, DMF, DMSO, and NMP (50 mL of each), were distilled from a 200 mL Schlenk flask, …

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Rotovap Distillation: What Is A Rotary Evaporator?

Rotovap Distillation: What Is A Rotary Evaporator?

Jul 21, 2017 The input speed and output speed are matched when the chiller maintains a stable temperature. If the chiller temperature rises: you’re injecting too much liquid. Dial back the valve until the chiller stabilizes. Once everything is stable: the rotovap can complete evaporation without supervision. Rotovap FAQ What’s a J-KEM DVR-200 Used For?

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How to freeze dry the 6 most challenging samples

How to freeze dry the 6 most challenging samples

Jun 22, 2020 Challenger #3: Alcohols. Alcohols (like methanol and ethanol) have a very low freezing point, so they present a temperature differential conundrum. Ethanol, for example, freezes at -117C. Because it's not possible to get a freeze dryer with a collector temperature of -137C, you must dilute these substances to 10 percent or less by adding an ...

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How to Minimize Bumping and Foaming Blog

How to Minimize Bumping and Foaming Blog

Jun 26, 2017 Anti-foam agents can be added to prevent foaming and a larger flask can be used to ensure that the foam stays in your evaporation flask. For bumping you can add agents, such as boiling chips, which make the boiling more uniform. To prevent contamination and sample loss from bumping or foaming, a bump trap or a foam brake can be installed.

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Rotary Evaporation in the Kitchen - Cooking Issues

Rotary Evaporation in the Kitchen - Cooking Issues

May 19, 2009 Fill water bath (usually 2/3 full) with warm to hot water, set the temperature and turn it on. Put the thermometer from the rotovap unit into the water bath. Clean the vapor duct area and install the vacuum seal. Install a DRY evaporation flask. Close off (seal) the receiving flask/pump takeoff area.

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Forced Degradation of Cannabidiol - Waters Corporation

Forced Degradation of Cannabidiol - Waters Corporation

Mobile phase B: Acetonitrile Gradient: Starting conditions at 73% mobile phase B with a 1 minute hold time, linear increase to 90% mobile phase B over 6 minutes Oven temp.: 30 C PDA detector: Wavelength 225 nm at 4.8 nm resolution, 3D data scan range Wavelength 225 nm at 4.8 nm resolution, scan range 200–400 nm

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Ethanol Removal in Cannabis Applications Blog

Ethanol Removal in Cannabis Applications Blog

Oct 31, 2019 The 20/40/60 rule offers a general guideline for rotovap operating conditions. Under this rule, the bath should be set to around 20 degrees higher than your desired vapor temperature. In turn, the condenser temperature should be set at around 20 degrees lower than the desired vapor temperature.

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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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Material Safety Data Sheet (MSDS) - Acetonitrile

Material Safety Data Sheet (MSDS) - Acetonitrile

Page 1 of 7 MSDS t Acetonitrile Material Safety Data Sheet (MSDS) - Acetonitrile Section 1: Chemical Product and Company Identification Product Name : Acetonitrile CAS# : 75 -05 -8 ... Auto-Ignition Temperature : 524C (975.2F) Flash Points : CLOSED CUP: 2C (35.6F). OPEN CUP: 5.6C (42.1F) (Cleveland).

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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 ... 13. The water bath temperature should not exceed the boiling point of the solvent. ... acetonitrile 81.8 . o. C 7.7 . o. C diethyl ether 34.6 . o. C -27.7. o. C ethanol 78.4 . o. C 19 . o. C

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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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Acetonitrile - NIST

Acetonitrile - NIST

Temperature (K) A B C Reference Comment; 288.3 - 362.3: 4.27873: 1355.374-37.853: Dojcansky and Heinrich, 1974, 2: Coefficents calculated by NIST from author's data.

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How to Use Preparative Chromatography? -

How to Use Preparative Chromatography? -

Ultra-low temperature medical freezer; Muffle Furnace; Chiller; Lab Instrument. vacuum Pump. ... The reverse phase chromatography generally uses acetonitrile and water as the eluent. When adopting the reverse phase chromatography for purification, firstly use water to flush pipelines and then use acetonitrile to rinse them. ... [email protected] ...

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Solvent Removal

Solvent Removal

Under vacuum (reduced pressure) liquids vaporize and boil off at lower temperatures; effectively, the solvents come off a lot faster when under vacuum than at atmospheric pressure. In the Organic Chemistry Teaching Labs, a small (25 or 50 mL) side-arm flask fitted with a rubber stopper is used to strip off small (5-10 mL) amounts of solvent.

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The Rotary Evaporator

The Rotary Evaporator

varies directly with temperature, i.e., the higher the temperature of a substance, the higher its vapor pressure. When a liquid is heated it begins to boil as the liquid turns to vapor forming ... 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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Acetonitrile - Ineos

Acetonitrile - Ineos

Water Acetonitrile 2-Methylbutane 24.7 0.76 5.7 93.54 Water Acetonitrile Benzene 66 8.2 23.3 68.5 Water Acetonitrile Isopropyl Ether 59 5 13 82 Water Acetonitrile Triethylamine 68.6 3.5 9.6 86.9 Water Acetonitrile Toluene 73 Acetonitrile Ethanol Triethylamine 70.1 34 8 58 Table 2.3: Ternary azeotropes of Acetonitrile

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