"Merck"

Supplier: Merck

2,5-Di-tert-butylhydroquinone for synthesis, Sigma-Aldrich®

Supplier: Merck

A need producing food, pharmaceuticals and cosmetics for Muslim consumers is that not only the products themselves must be 'halal' (lawful); also everything used inside the production area must be halal-certified. Merck halal-certified dehydrated culture media for microbiological QC for environmental monitoring and aseptic process simulation are in compliance with this need.

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

3-Chlorophenol for synthesis, Sigma-Aldrich®

Supplier: Merck

1,2-Dimethoxyethane for synthesis, Sigma-Aldrich®

Supplier: Merck

Oxalic acid dihydrate, EMSURE® ACS, ISO, Reag. Ph. Eur. for analysis, Supelco®

Supplier: Merck

N,N-Dimethylethylamine, Sigma-Aldrich®

Supplier: Merck

1,4-Dinitrobenzene for synthesis, Sigma-Aldrich®

Supplier: Merck

Ammonia solution 25%, Suprapur® for trace analysis, Supelco®

Supplier: Merck

Copper di-ammonium solution Cu(NH₄)₂-EDTA 0.1 mol/l, Titriplex®, Supelco®

Supplier: Merck

9-Methylanthracene for synthesis, Sigma-Aldrich®

Supplier: Merck

1-Octadecanol for synthesis

Supplier: Merck

Thiourea for synthesis, Sigma-Aldrich®

Supplier: Merck

Application note: Method A or Method B
Method A: For the measurement the method 195, which is pre-calibrated in the Spectroquant® Pharo-and NOVA-photometers can be used. To increase the precision of the results a self-made blank according to the application is recommended generally.
Method B: For the measurement the pre-calibrated method 195 is not applicable. Instead of that, a self-made calibration according the application is to perform.

Supplier: Merck

Surface: CuO
Core: Cu₂O

Supplier: Merck

Calcium oxide, Supelco®