If you buy Antibodies supplied by Multisciences they should be stored frozen at - 24°C for long term storage and for short term at + 5°C.
Rabbits are used for polyclonal antibody production by Multisciences. Rabbit antibodies are very stable and can be stored for several days at room temperature. Multisciences adds sodium azide and glycerol to enhance the stability of the rabbit polyclonal antibodies. Anti-human, anti mouse antibodies to highly immunogenic selected peptide sequences are" monoclonal like" since the epitope to which they are directed is less than 35 amino acids long.