By train
Please see SBB website for train timetables to Bern.
a 10-minute walk from the central station Bern Bahnhof
After getting off the train, ignore the escalator/stairs on the platform and head down into the main station underpass. Take one of the lifts at the end of the underpass near platform 13 and ride to the 4th floor "Grosse Schanze".
Upon exiting the lift, turn round and away from the view of the city and mountains. Pass between the two large historic buildings (the former railroad administration on the left and the main University building on the right). Cross Hochschulstrasse and turn right after the small park. Walk along the main road (Länggassstrasse).
Approx. 100 metres later, you will see a restaurant named "Beaulieu" on the left; from there follow Erlachstrasse departing slightly to the left from the main street. After approx. 200 m pass the roundabout and walk straight on. You will find the Department of Chemistry, Biochemistry and Pharmaceutical Sciences on your left, about 50 m after the roundabout.