Eau Bactériostatique 10ml Accessoires

The 10 ml format is the "bulk" standard of research laboratories. It covers multiple reconstitutions (typically 3-5 peptide vials of 2-3 ml each depending on the reference), reduces unit cost compared to 3 ml formats, and allows comfortable management of protocols requiring several peptides in parallel. Pharmaceutical type-I glass vial, chlorobutyl stopper, aluminum flip-off capsule. Research Use Only (RUO): not intended for human medicine preparation nor direct clinical use.

Activity spectrum. Benzyl alcohol at 0.9% maintains bacteriostatic activity on the majority of gram-positive bacteria (Staphylococcus aureus including coagulase-producing strains, Streptococcus pyogenes) and gram-negative (Escherichia coli, Pseudomonas aeruginosa) commonly implicated in injectable contamination. Activity on yeasts (Candida albicans) and some fungi (Aspergillus) is documented but less powerful: severe fungal contamination of a BAC vial may still proliferate slowly beyond 4-6 weeks. Activity on bacterial spores (Bacillus, Clostridium) is nil: a vial contaminated with viable spores will NOT be decontaminated by BAC, hence the importance of initial sterility of the manufacturing process.

Chemical stability of benzyl alcohol. Benzyl alcohol is remarkably stable under normal storage conditions: little sensitive to ordinary light, little sensitive to temperature variations in the 0-30 degree range, little sensitive to humidity (water miscible). The only significant documented degradation is slow oxidation to benzaldehyde then benzoic acid, which can occur in very old vials (>5 years) or ones stored at high temperature. This degradation can produce a characteristic slightly almond-like odor (benzaldehyde) — a vial smelling of bitter almond must be considered suspect.

Compatibility with peptides. The vast majority of research peptides are chemically compatible with BAC at 0.9% benzyl alcohol. A few documented exceptions: (1) peptides very rich in N-terminal tryptophan residues may undergo slightly accelerated oxidation in the presence of benzyl alcohol (DSIP, some alpha-MSH fragments) — solution stability is then reduced to 10-14 days rather than 21 days; (2) some complex protein formulations (insulin, recombinant GH) may interact with benzyl alcohol, but these industrial biologics have their own dedicated diluents; (3) metal-peptide complexes (GHK-Cu notably) are stable in BAC. In daily peptide laboratory practice, BAC 0.9% benzyl alcohol is universally compatible.