"Merck"

Supplier: Merck

Standard solutions are used for the calibration of spectrophotometers.

Supplier: Merck

1-Bromobutane for synthesis, Sigma-Aldrich®

Supplier: Merck

L(+)-Aspartic acid for synthesis, Sigma-Aldrich®

Supplier: Merck

3-(2-Hydroxyethyl)indole

Supplier: Merck

L-Methionine ≥99%, Millipore®

Supplier: Merck

Absorption tube for H₂O (molecular sieve 0.3 nm with indicator)

Supplier: Merck

Piperidine for synthesis, Sigma-Aldrich®

Supplier: Merck

1,4-Bis(hydroxymethyl)cyclohexane (mixture of cis and trans isomers)

Supplier: Merck

With their high degree of UV transmittance, low particle count, low acidity and alkalinity and low evaporation residue level, LiChrosolv® solvents are ideal for reproducible separations. Since separations are normally carried out under gradient conditions in analytical HPLC, we offer solvents in "gradient grade" as well as "isocratic grade". This enables to minimize the gradient effect of the solvent involved.

Supplier: Merck

Polyethylene glycol 3,000 for synthesis, Sigma-Aldrich®

Supplier: Merck

Isethionic acid sodium salt (sodium 2-hydroxyethanesulphonate) for synthesis, Sigma-Aldrich®

Supplier: Merck

Sodium borohydride for synthesis, Sigma-Aldrich®

Supplier: Merck

1,4-Dioxane stabilised, EMPLURA®, Supelco®

Supplier: Merck

Aminoiminomethanesulphinic acid for synthesis, Sigma-Aldrich®

Supplier: Merck

Chloramine-T (sodium salt) trihydrate, extra pure, Supelco®

Supplier: Merck

Löffler's methylene blue solution is generally used as bacteriological counter staining of, e.g. of gonococcae, lactic acid bacteria and for visualization of the pole corpuscles of pasteurella.