The Joint Conference on 91AV is an annual conference organized by the consortium of 91AV Department of five universities in Central Java, Indonesia : Diponegoro University (UNDIP), Universitas Negeri Semarang (UNNES), Sebelas Maret University (UNS), Jenderal Soedirman University (UNSOED) and Satya Wacana Christian University (UKSW). The conference will be a chemistry related disciplinary event considering all the major areas of chemistry, including inorganic, physical, organic, analytical and biochemistry. This conference also presents topics on chemical education, policies, and many other interesting topics. Interfaces with other sciences and other research areas will be actively encouraged.