94511 Results for: "Merck"

Supplier: Merck

Ethanolamine hydrochloride

Supplier: Merck

Nitric acid 60%, Ultrapure for trace analysis, Supelco®

Supplier: Merck

Prepsolv® solvents are tailored to the requirements of preparative HPLC to facilitate scale-up from analytical to preparative separations. With their extremely low evaporation residue (< 1 mg/l) and low water content, they ensure optimal protection for columns.

Supplier: Merck

Hydrochloric acid 0.5 mol/l (0.5 N), Titripur® Reag. USP volumetric solution, Supelco®

Supplier: Merck

Chromogenic media offer a method for rapid identification of characteristic bacterial enzymes. Merck offers a wide range of solid and liquid culture media that also permits the fluorescence detection of E. coli under the trade name Fluorocult®. Fluorocult® culture media have the same components as the standard media and additionally the substrate MUG. Some of the media also contain tryptophan as the substrate for a possible indole reaction to further confirm E. coli presence. The Fluorocult® method can produce a positive result within just 24 to 48 hours. In the case of the chromogenic media, a direct identification, using the characteristic colony colouring on the culture medium itself is possible without the application of further additives. A differentiation of positive single colonies is possible, even when high microbial counts are present.

Supplier: Merck

The isolation of microorganisms often requires the use of selective media. The use of freeze-dried supplements ensures an optimal and standardised medium preparation and thus optimised performance of the selective medium.

Supplier: Merck

Carbon disulphide, Uvasol® for spectroscopy, Supelco®

Supplier: Merck

3,5-Dihydroxytoluene for synthesis, Sigma-Aldrich®

Supplier: Merck

Petroleum spirit, 40…80 °C for denaturation, Supelco®

Supplier: Merck

Benzene, EMSURE® Reag. Ph. Eur., ACS, ISO for analysis

Supplier: Merck

Petroleum spirit, 30…50 °C, EMSURE® for analysis, Supelco®

Supplier: Merck

Desiccant suitable for desiccators to remove water, and for drying most gases and liquids (apart from strongly acidic and basic gases, organic solvents or alkaline liquids). The product contains iron salts as the indicator. Colour change is from orange to colourless at approx. 7/10 g adsorbed H₂O/100 g silica gel. Regeneration can be performed as often as required at 130 to 140 °C in a drying oven for approx. 3 hours.

Supplier: Merck

EMSURE® grade solvents are suitable for a broad spectrum of classical lab applications, and are frequently used in regulated and highly demanding lab applications. EMSURE® provides worldwide best and most extensive product specifications. We declare our EMSURE® range to be in compliance with the ACS, with the reagent part of the European Pharmacopoeia (Reag. Ph Eur) and also with the ISO standards.

Supplier: Merck

Cadmium, granular, EMSURE® ∼ 3-6 mm for analysis, Supelco®

Supplier: Merck

N-Methylanthranilic acid for synthesis, Sigma-Aldrich®

Supplier: Merck

Chloroform stabilised, SupraSolv® for GC-ECD/FID, for residue analysis, Supelco®

Supplier: Merck

2,6-Xylenol, GR for analysis, Supelco®

Supplier: Merck

Chromium(III) chloride hexahydrate

Supplier: Merck

2-Methylfuran stabilised for synthesis, Sigma-Aldrich®

Supplier: Merck

1,1,3,3-Tetramethoxypropane for synthesis, Sigma-Aldrich®

Supplier: Merck

Silicon(II) oxide, Patinal®

Supplier: Merck

Silicon dioxide (Silica, vitreous), granules, Patinal® 1-4 mm

Supplier: Merck

A range of cleansers, for manual cleaning, that have been developed to meet the cleaning requirements for glassware and small equipment in the laboratory.

Supplier: Merck

3,4,9,10-Perylenetetracarboxylic dianhydride for synthesis, Sigma-Aldrich®

Supplier: Merck

m-Phenylenediamine for synthesis, Sigma-Aldrich®

Supplier: Merck

Pentafluoropropionic acid for synthesis, Sigma-Aldrich®

Supplier: Merck

The filters without binder resin retain their structural integrity without weight loss when heated up to 500 °C and can therefore be used in gravimetric analysis as well as for the filtration of hot gases.

Supplier: Merck

Ethyl cyanoacetate, Sigma-Aldrich®

Supplier: Merck

Dibenzothiophene, Sigma-Aldrich®

Supplier: Merck

2,4-Dichlorobenzaldehyde for synthesis, Sigma-Aldrich®