Chlortetracycline hydrochloride is a tetracycline-class antibiotic supplied in a 100 gram laboratory-grade format for microbiological and research applications. It functions by inhibiting bacterial protein synthesis through binding to the 30S ribosomal subunit, preventing amino acid incorporation during translation. This antibiotic exhibits activity against a broad range of Gram-positive and Gram-negative bacteria. It is commonly used in microbiological testing, antimicrobial susceptibility studies, and selective media preparation. The hydrochloride form enhances solubility and stability in aqueous solutions, making it suitable for laboratory use. It is widely applied in research, pharmaceutical development, and microbiology laboratories.