Aquastar® – Reagents for Fast,Precise and Reliable Karl Fischer Titration


Using MilliporeSigma's Aquastar® reagents for Karl Fischer titration, the water content of gases, liquids and solids can be determined easily and with high accuracy and reliability. Our comprehensive Aquastar® product line covers the whole range of volumetric and coulometric Karl Fischer reagents, rounded off with various water standards for titer determination, monitoring and qualifying Karl Fischer equipment, and checking measuring results.

For volumetric titration suitable for higher water content levels (0.1–100%), we supply both one-component and two-component reagents. You benefit from high titration rates for fast analysis and accurate, reliable results. A comprehensive portfolio of Aquastar® solvents is available for water determination in aldehydes and ketones as well as in oils and fats. Our accompanying Aquastar® buffer solutions help maintaining the optimum 5-7 pH range.

For coulometric titration primary used for determining very low water contents (< 1%), we provide combined reagents that contain all reaction components in one solution and can be used as both anolyte and catholyte. Your advantage: Even in diaphragm cells only one reagent is necessary. This makes your coulometric KF titration much easier and prevents mistakes.

Our New Global Karl Fischer Product Line

We are proud to present you our new global product range of Karl Fischer reagents and standards named Aquastar®. We will replace our existing Apura® trademark with the new brand name Aquastar® outside of North America. In North America Aquastar® is already a very well-known and established high quality brand. To offer one global available product line worldwide we will use in the future for all our Karl Fischer products the brand name Aquastar®.

For all products you received in North America with the trademark Apura® nothing will change to the products itself, only the tradename to Aquastar®. All products will keep the same catalogue numbers, designation, composition, quality, performance and specification.

All of the products continue to be supplied from the same source as before; they are manufactured and packaged in our Merck KGaA Darmstadt, Germany or in the Norwood, Ohio, USA facility.

If you need and further help or support, please contact your local sales representative.

Catalog Number Catalog Name
188036 Buffer solution for strong bases
188026 Test Kit Titrantfor water determination
188055 Water standard oil
106664 Sodium tartrate dihydrate
1.88001 CombiTitrant 1
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