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

Opening hours:
Mon. - Fri. from 9.00 a.m. - 12.30 p.m. and 13.00 p.m. - 16.00 p.m.


Changed opening hours in 2025: 
Monday to Friday: 10 am - 3 pm 
Thursdays: open until 6 pm 
(closed during lunch break every day from 12.30-1.00 pm)

Thankfully we have an online store where you can order 24 hours a day!

 (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 ?

·         from the south:

Freeway A61 at the intersection Meckenheim take the exit Bonn A565. After approx. 12 km, take the Bonn-Tannenbusch exit and then turn right.
Take the next right again and then turn right into Bonn-Brühler Straße. After about 300 m you will pass under three bridges.
Continue straight ahead on Justus-von-Liebig-Straße until you reach the first traffic island. Take a right here into Fraunhoferstraße. House number 7 is at the end on the left-hand side.

·         from the north:

Freeway A555 direction Köln-Bonn. Take the Bonn-Zentrum exit and at the big roundabout take the first right towards Tannenbusch.
At the first traffic light you take a left-turn and then turn right into Bonn-Brühler Straße. After about 300 m you will pass under three bridges. Continue straight ahead on Justus-von-Liebig-Straße until you reach the first traffic island. Take a right here into Fraunhoferstraße. House number 7 is at the end of the street on the left-hand side.