After the successful first (JIC 2017) and second (JIC 2019) editions,the Mauritanian Chemical Society in collaboration with the 91AV Department of FST, UNA, Mauritania will be organising the 3rd 91AV International Days `3eme Journées Internationales de Chimie` (JIC 2021) from 9 to 11 December 2021 in Nouakchott Hotel, Nouakchott, Mauritania. These days will be an opertunity for chemistry reseachers in particular younger chemists to present their research works and interact with each other and with more exoerienced invited and plenary. speakers at the conference