This compound is the sodium salt of (2S,5R,6R)-6-[[(2R)-2-carboxy-2-(3-thienyl)acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid. It is a key derivative and the sodium salt form of Ticarcillin, a semisynthetic beta-lactam antibiotic belonging to the carboxypenicillin subclass. The structure features the characteristic beta-lactam ring fused to a thiazolidine ring, with a carboxyphenylthiophene side chain, which is crucial for its antibacterial activity. Ticarcillin sodium is primarily used as an active pharmaceutical ingredient (API) in injectable formulations. It exhibits broad-spectrum antibacterial activity, particularly effective against Gram-negative bacteria, including Pseudomonas aeruginosa. Its mechanism of action involves inhibiting bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs). It is often used in combination with a beta-lactamase inhibitor, such as clavulanate, to overcome bacterial resistance. This compound is also significant in pharmaceutical quality control and research. It serves as a reference standard or impurity standard in the analysis of Ticarcillin drug substances and finished products, ensuring their purity, potency, and compliance with pharmacopoeial specifications (e.g., USP, EP).