Demeclocycline (INN, BAN) (brand names Declomycin, Declostatin, Ledermycin, Bioterciclin, Deganol, Deteclo), also known as demeclocycline hydrochloride (USAN) (brand names Detravis, Meciclin, Mexocine, Clortetrin), is a semisynthetic tetracycline antibiotic which was derived from a strain of Streptomyces aureofaciens. Demeclocycline binds to bacterial 30S ribosomal subunit and prevents binding of aminoacyl-tRNA to the mRNA-ribosome complex, thereby inhibiting protein synthesis. Demeclocycline also inhibits the effect of vasopressin on the renal tubules, thereby causing diuresis. (Source: https://en.wikipedia.org/wiki/Demeclocycline).

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.