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2-Iodoso-3,4,5,6-tetrafluorobenzoic acid ≥95% (by total nitrogen and titration analysis)

Supplier: Adipogen
Description: Hypervalent iodine reagents. Convenient substitute of o-Iodosobenzoic acid (IBA) as an oxidant. Can be used for installations of alpha/beta-unsaturation to carbonyl compounds, oxidations and cyclizations by single-electron transfer processes. Promotes faster reactions than IBA with better solubility in common organic solvents. An attractive feature is the ability to directly measure reactivity by 19F NMR spectroscopy without the use of deuterated solvents.

Product Image-RCSOD117-1

Acetic titration solvent

Catalog Number: (RCSOD117-1)
Supplier: Ricca Chemical
Description: Acetic titration solvent

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Product Image-RCSOD118-1

Alkaline titration solvent

Catalog Number: (RCSOD118-1)
Supplier: Ricca Chemical
Description: Alkaline titration solvent

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Product Image-BJ34803-100G

Auxilary Reagents for Karl Fischer Titration, HYDRANAL™, Honeywell Research Chemicals

Clearance
Supplier: Honeywell Research Chemicals
Description: Karl Fischer titration is applied to multifarious substances. The nuances in sample properties influence the Karl Fischer titration differently. There are a number of ways to adjust the working conditions.

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Product Image-BJ34730-1L

HYDRANAL® Karl Fischer Reagents, Honeywell Research Chemicals

Supplier: Honeywell Research Chemicals
Description: Original and Innovative Karl Fischer Reagents to analyze or measure water content

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Product Image-10861-684

Compact Titrators, METTLER TOLEDO

Supplier: Mettler Toledo
Description: METTLER TOLEDO Compact Titrators are designed for routine applications and simple operation.

Product available on GSA Advantage®

Product Image-JT5625-2

Bromine 0.1 N, BAKER ANALYZED® volumetric solution, J.T.Baker®

Catalog Number: (JT5625-2)
Supplier: AVANTOR PERFORMANCE MATERIALS US
Description: Bromine (Bromide-Bromate), 0.1N Volumetric Solution, BAKER ANALYZED® Reagent

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Product Image-76403-670

TITRONIC 300 Manual Titrator, SI Analytics

Supplier: YSI
Description: This titrator is an appropriate motor-driven burette for manual titration and and precise dosing instrument for dispensable liquids, solvents and titrating agents. This is not only a stand-alone device, but also shows its strengths in the computer controlled 'Daisy Chain' network.

Product Image-97016-756

Accessories for METTLER TOLEDO Titrators

Supplier: Mettler Toledo
Description: Allows Automatic Aspiration Of Sample Waste After Analysis.

Product available on GSA Advantage®

Product Image-BDH85458.290

VWR® Volumetric Reagents for Water Determination by the Karl Fischer Method

Supplier: VWR International
Description: These reagents are ideal for water determination including the analysis of aldehydes and ketones.

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Product Image-103193-836

Mercaptan Titrant Solvent

Catalog Number: (103193-836)
Supplier: Aqua Solutions
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Bromine ≥99.998% (metals basis), liquid

Supplier: Thermo Scientific Chemicals
Description: MDL: MFCD00010896

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Image Unavailable-76177-354

β-(N-Morpholino)ethanesufonic acid (MES) monohydrate ≥99%, white crystalline powder for molecular biology

Supplier: MP Biomedicals
Description: MES is a zwitterionic buffer. One of the "Good" buffers developed for biological applications. It has the advantages of maximum water solubility and minimum solubility in all other solvents, minimal salt effects, minimal change in pK with temperature, chemically and enzymatically stable, minimal absorption in visible or UV spectral range.
A buffer using MES free acid can be prepared by titrating the free acid with sodium hydroxide to the desired pH (pKa ± 1). Alternatively, volumes of equimolar MES free acid and sodium or potassium MES can be mixed to attain the desired pH.

Image Unavailable-102989-640

5,5'-Dithiobis(2-nitrobenzoic acid) (Ellmans reagent, DTNB)

Supplier: Adipogen
Description: A sensitive reagent for measuring the free sulfhydryl content in proteins, peptides, and tissues. Used to characterize reactive thiol groups and photometric determination of thiols and for measuring low-molecular mass thiols such as glutathione in both pure solutions and biological samples, such as blood. It can also measure the number of thiol groups on proteins. Through reaction with aliphatic thiol groups a mixed disulfide of protein thiol and one mole of 2-nitro-5-thiobenzoate per mole of protein sulfhydryl group is being formed. DTNB has little absorbance. Reaction with -SH groups on proteins (from any solvent accessible Cys) under mild alkaline conditions (pH 7-8) produces the 2-nitro-5-thiobenzoate anion, which gives an intense yellow color with an absorption maximum at 409.5nm (Extinction coefficient: 14150 M-1*cm-1). Sensitive to various buffer ions, therefore, the extinction coefficient used to calculate the number of sulfhydryl groups must be matched to the reaction conditions. In case the thiol groups are in disulfide bonds, they must be reduced under anaerobic conditions prior to reaction with DTNB.

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Bromine 99.5+% ACS

Supplier: Thermo Scientific Chemicals
Description: Bromine 99.5+% ACS

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Combined pH Electrodes, Mettler

Supplier: Mettler Toledo
Description: Combined glass pH electrodes for direct pH measurement and acid/base titrations in aqueous or non-aqueous media.

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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us at 1-800-932-5000.
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR Regulatory Department at Regulatory_Affairs@vwr.com
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