Johannes Brahms's Clarinet Quintet in B minor, Op. 115 was written in 1891 for the clarinettist Richard Mühlfeld. It is scored for a clarinet in A with a string quartet. It has a duration of approximately thirty-five minutes.
At the time Brahms started composing his Clarinet Quintet, only a few works had been composed for this type of ensemble. Examples of clarinet quintets include those by Wolfgang Amadeus Mozart, Anton Reicha, Carl Maria von Weber, Franz Krommer, Alexander Glazunov, Heinrich Baermann, and Thomas Täglichsbeck. Brahms modeled his composition after Mozart's.
Brahms had retired from composing prior to listening to Richard Mühlfeld play. Brahms may have met Mühlfeld already when Hans von Bülow was directing the Meiningen Court Orchestra. But it was Fritz Steinbach, von Bülow's successor, who brought Mühlfeld's playing to the attention of Brahms in March 1891. Brahms was very enthusiastic about Mühlfeld. That summer at Bad Ischl, he composed the Clarinet Quintet and his Clarinet Trio Op. 114, both of them for Mühlfeld. He later also composed his two Clarinet Sonatas Op. 120.
The quintet received its first private performance on 24 November 1891 in Meiningen, with Richard Mühlfeld and the Joachim Quartet, led by Joseph Joachim who often collaborated with Brahms. The public premiere was on 12 December 1891 in Berlin.