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How to find us

Dr. F. Krantz
Rheinisches Mineralien-Kontor GmbH & Co. KG

Fraunhoferstraße 7
53121 Bonn
Telefon:  +49 (0) 228 / 988 65-0 
Telefax:  +49 (0) 228 / 988 65-20
E-Mail: info@krantz-online.de
orders to: bestellung@krantz-online.de

We will be closed at February  16th and 12th 2026. 

Opening hours:
Mon. - Fri. from 10.00 a.m. - 12.30 p.m. and 13.00 p.m. - 15.00 p.m

Thursday - 6 p.m.

 (additional opening hours on request)

We look forward to every visitor! If you would like to come by, please make sure in advance that the desired products are in stock and that the right staff is present. Not all products are in stock and not all employees are on-site every day. But if you let us know in advance, we will certainly find a suitable time for you to visit us.


How do you get to Krantz ?

Coming from the south (A61 → A565):

  • At the Meckenheim interchange, leave the A61 and take the A565 towards Bonn.

  • After approx. 12 km, take the Bonn-Tannenbusch exit and turn right.

  • Immediately take the next right, then another right into Bonn-Brühler Straße.

  • After about 300 m, go under three bridges.

  • Continue straight on Justus-von-Liebig-Straße until you reach the first traffic island.

  • On the right-hand side, you will see glass recycling containers and a telephone booth.

  • Turn right into Fraunhoferstraße.

  • House number 7 is on the left-hand side.


Coming from the north (A555):

  • Follow the A555 towards Cologne–Bonn and take the Bonn-Zentrum exit.

  • At the large roundabout, take the first exit on the right towards Tannenbusch.

  • At the first traffic light, turn left, then immediately right into Bonn-Brühler Straße.

  • After about 300 m, go under three bridges.

  • Continue straight on Justus-von-Liebig-Straße until the first traffic island.

  • You’ll see glass containers and a telephone booth on the right.

  • Turn right into Fraunhoferstraße.

  • Number 7 is located on the left-hand side of the street.