Acetylisovaleryltylosin Tartrate CAS 63428-13-7 Tartrate Tylosin is a bacteriostat feed additive used in veterinary medicine. Tartrate Tylosin has a broad spectrum of activity against gram positiveorganisms and a limited range of gram negative organisms. Tylosin Tartrate is a kind of macrolides antibiotic feed additive for mycoplasma disease and respiratory diseases of livestock and poultry as well as promoting animal growth.