Our Products

Rotary Evaporator

Laboratory equipment

Jacketed Reactor

Contact Us

We Cherish All Interactions

1,2-Dimethoxybenzene ReagentPlus®, 99% | Veratrole | Sigma .

Synonym: Pyrocatechol dimethyl ether, Veratrole CAS Number 91-16-7. Linear Formula C 6 H 4 (OCH 3) 2. Molecular Weight 138.16 . Beilstein/REAXYS Number 1364621 . EC Number 202-045-3. MDL number MFCD00008357. PubChem Substance ID 24848455. NACRES NA.22

C251.03 Lab -- Frontalin Project

Dry and rotovap the combined ether layers and see if you get anything. Be careful not to heat the flask when rotovapping, and don't over rotovap, since your product is fairly volatile. 4/7/03 -- One group that tried the distillation procedure obtained about the same amount of material as the groups that used the Dean-Stark method (approximately .

Pressure-Temperature Nomograph Interactive Tool | Sigma .

Calculate a boiling point or pressure using the Antoine Equation: The Pressure-Temperature Nomograph is a graphical application of the Clausius-Clapeyron Equation, which assumes the heat of vaporization is a constant over a pressure range.

Lab Equipment - Sorbent Technologies

Dimethyl sulfoxide7.21.4783268 189 3 Trichloroethylene101.467 87.19 276 0 Water10.21.333190 100 8 Pentane Cyclopentane Heptane Hexane Isooctane Cyclohexane Carbon .

Intermolecularly Hydrogen-Bonded Dimeric Helices .

4.1.7 3,4-Dimethyl-1H-pyrrole (9) Ethyl 3,4-dimethyl-1H-pyrrole-2-carboxylate from above (4.7 g, 28 mmol) was dissolved in ethanol (40 mL), then a solution of NaOH (3.5 g) in water (15 mL) was added, and the mixture was heated at reflux overnight. After 16 h the reaction was complete, the volume was reduced (rotovap), and the resulting solid .

Buy Hexane | 1 Gallon 60 | 5 Gallon 130 | 55 . - Lab Alley

Buy Hexane (C6H14) Online Here Or By Phone: 512-668-9918 If you have questions about ordering hexane (n-hexane) online here at LabAlley.com or would like to place an order, call 512-668-9918 or email [email protected] to talk with a Hexane .

1,3-Dimethoxybenzene | C8H10O2 - PubChem

Use of the information, documents and data from the ECHA website is subject to the terms and conditions of this Legal Notice, and subject to other binding limitations provided for under applicable law, the information, documents and data made available on the .

1,4-Dimethoxybenzene | C8H10O2 - PubChem

The rate constant for the vapor-phase reaction of hydroquinone dimethyl ether with photochemically produced hydroxyl radicals has been estimated as 2.0X10-11 cu cm/molecule-sec at 25 °C(3,SRC). The half-life of hydroquinone dimethyl ether is approximately 19 hours based on a hydroxyl radical concentration of 5X10+5(3,SRC).

Molbank 2006 - MDPI

1-nitro-3-(phenylthio)methyl]benzene, 1 (3.830 g, 15.61 mmoles), 12 mL of 30% hydrogen peroxide, and 30 mL of concentrated acetic acid were combined in a round bottom flask and refluxed for 24 hours. Initially, the reaction mixture was yellow, but after refluxing, a white solid became evident.

An Efficient and Economic Synthesis of (+)-Nootkatone .

6,6-dimethyl-bicyclo [3.3.1]heptan-2-one, Nopinone. Following a method as described . The solvent was removed via rotovap and the crude brown residue was dissolved in ether. The ethereal solution was passed through a series of dry . Freshly distilled benzene was cannulated into the apparatus and the

10.1016/j.coldregions.2007.08.005 | DeepDyve

Jun 11, 2020 · Read "10.1016/j.coldregions.2007.08.005" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Molbank 2006 - MDPI

1-nitro-3-(phenylthio)methyl]benzene, 1 (3.830 g, 15.61 mmoles), 12 mL of 30% hydrogen peroxide, and 30 mL of concentrated acetic acid were combined in a round bottom flask and refluxed for 24 hours. Initially, the reaction mixture was yellow, but after refluxing, a white solid became evident.

Indian Patents. 209091:QUINOLINE AND QUINOXALINE .

quinoxalin-2-ol To a solution of MeOH (15 mL) under argon is added pulverized NaOH pellets (0.86 g, 21 mmol) and 4-bromo-5-methoxy-benzene-l,2-diamine dihydrochloride (2.7 g, 9.3 mmol). The mixture is stin-ed for 10 minutes, then a solution of 45% ethyl giyoxylate .

Orgo Lab Exam 2 Flashcards | Quizlet

1,4 dimethoxy benzene. Is a neutral compound. pKa Benzoic acid. pKa of benzoic acid ≈ 4.17 (Strong acid) pKa of 2-napthol. pKa 2-Napthol ≈ 9.5 (Weak acid) . Rotovap usefulness. vacuum lowers pressure, and therefore lowers boiling point of flammable liquid to then evaporate it. n-Hexane density and boiling point. density: 0.66 g/ cm3

Can't Buy These Thrills | In the Pipeline

May 23, 2006 · Back in the 1960-70s when I was a young chemist in the lab, the oldtimers bemoaned the increasing emphasis on lab safety and all these worries about carcinogens etc. Mind you, being still young and immortal, we were still able to be standing at the hood with a burning cigarette hanging from our lips and shaking the sep funnel while we did the ether extractions.

The Synthesis of 6A, 6B-Dideoxy-

Potassium-t-butoxide (0.04 g, 0.36 mmol) was added with stirring under nitrogen. After 10 minutes a deep green color was achieved. The solutions were mixed and heated overnight to 70 ºC under nitrogen. The benzene was removed by rotovap and the DMSO was distilled off at 60 ºC under a vacuum of 0.1 Torr.

Quiz2extractions - Question 1 What is the definition of .

Benzene would be the most efficient solvent to use. Response Feedback: Definition of distribution coefficient: K = (conc X in organic layer)/(conc X in aqueous layer) The higher the K, the more the compound X prefers the organic layer. A K of <1 implies that the compound prefers the water layer.

Evaporator Archives | BioChromato

Evaporation is an integral part of chemistry research and the de facto instrument is the Rotary Evaporator, also referred to as Rotovap. As much as they are commonly used for concentrating solvents, they also have a reputation for issues that include bumping and annihilating substances, slow evaporation, especially for DMSO / DMF and other high-boiling point substances and difficulty working .

A General Photocatalytic Route to Prenylation - Rathnayake .

Prenylation of Aniline: A 12 × 75 mm borosilicate tube fitted with a rubber septum was charged with Eosin Y (0.6 m m, 0.6 mL in DMSO), aniline (0.12 mmol, 1 equiv.), t BuONO (0.24 mmol, 2 equiv.) and [(2‐methylbut‐3‐en‐2‐yl)sulfonyl]benzene (0.6 mmol, 5 equiv.). Then the tube was placed in a light bath and the lower portion of the .

What's the Best Ethanol for Commercial Solvent Extraction .

Ethanol (EtOH or ethyl alcohol) is a multifaceted solvent that mixes without separation in water and other organic solvents including acetic acid, acetone, benzene, carbon tetrachloride, chloroform, diethyl ether, ethylene glycol, glycerol, nitromethane, pyridine, and toluene.

Diazepam (Valium) Synthesis

Dissolve 180 g 2-methylamino-5-chlorobenzophenone in 1 l dry dichloromethane, add 100 g chloroacetyl chloride over 1 h and reflux 10 h. Rotovap off the dichloromethane (dryness in the flask, end (60 °C, 20 torr). Dissolve 400 g hexamethylene tetramine (urotropine) in 3 l .

1-(Amino-alkyl)-2-aryl-cyclohexane alcohols and esters .

Aug 10, 1976 · The extract is dried and heated at 100° until the evolution of nitrogen is above over, then refluxed 2 hours, concentrated to a slurry on the rotovap and the solid filtered and washed with benzene and cyclohexane to give 28.8 g of 4-methyl-6-phenyl-1-oxa-3-azaspiro [4.5] decan-2-one, m. 171°-3°.

20l 50l Chemical Rotovap Turnkey System Equipment Factory .

20l 50l Chemical Rotovap Turnkey System Equipment Factory Price Rotary Evaporator, Find Complete Details about 20l 50l Chemical Rotovap Turnkey System Equipment Factory Price Rotary Evaporator,20l Rotary Evaporator With Chiller And Vacuum Pump,20 Liter Rotovap Dimethyl Benzene,20l Price Rotary Evaporator from Evaporator Supplier or Manufacturer-Nantong Sanjing Chemglass Co., Ltd.

Alkylxylene sulfonates for enhanced oil recovery processes .

Jan 19, 2006 · The structures for the 4-alkyl-1,2-dimethyl benzene and the 3-alkyl-1,2-dimethyl benzene are given below. Preferably, the attachment of the alkyl group to the xylene moiety in the above alkylxylene sulfonate is at positions higher than the 2-position along the alkyl chain in at least 45 percent of the total alkylxylene sulfonate.

Safe lab setup help required - carbon treatment under .

Feb 20, 2013 · However using benzene is an issue for me because I'll be using the treated carbon after treatment 3 for adsorption studies of benzene, toluene and xylene from aqueous solutions. So the benzene (from treatment 2) will adsorb on the carbon surface and fill up the adsorption sites before I even use the carbon the adsorbtion study.

Synthetic Approaches to Manganese-Complexed Acenes for .

combined, dried with magnesium sulfate and sodium bicarbonate and solvent evacuated with a rotovap and then Schlenk-line vacuum at 300 µmHg. The dark red liquid is then distilled at 0.9–1.3 mmHg, with the desired compound collected as a light yellow liquid at 6080 . o. C (4.2 g, crude yield of 41%). The -

5-Dimethyl­amino-N,N-dimethyl-2-nitro­benzamide

Jun 01, 2009 · 5-Fluoro-2-nitrobenzoic acid (5 g, 0.0270 mol) was heated with 40% aqueous dimethyl amine solution (50 ml) at 100°C for 18 hrs. Reaction mixture was concentrated through rotovap using high vacuum pump to afford 5-(dimethylamino)-2-nitrobenzoic acid as yellow crystalline solid (4.5 g).

Minimum Alcohol % Needed to Dissolve Cannabinoids | Rollitup

Jan 08, 2019 · I know, but benzene is the most commonly used entrainer and I didn't want to go listing all the non-polar solvents that could be used. I figured if the alcohol needed to be higher than 95:5, I could always use a molecular sieve and then reclaim the sieve for regeneration and reuse later. Fractional distillation is the route I am going to take.

A General Photocatalytic Route to Prenylation - Rathnayake .

Prenylation of Aniline: A 12 × 75 mm borosilicate tube fitted with a rubber septum was charged with Eosin Y (0.6 m m, 0.6 mL in DMSO), aniline (0.12 mmol, 1 equiv.), t BuONO (0.24 mmol, 2 equiv.) and [(2‐methylbut‐3‐en‐2‐yl)sulfonyl]benzene (0.6 mmol, 5 equiv.). Then the tube was placed in a light bath and the lower portion of the .

dithizone - Verrerie Villeurbannaise

You have no items in your shopping cart. Checkout View cart. Search