Overview
Ortho-Phthalaldehyde (OPA) is an organic compound primarily recognized for its role as a high-level disinfectant and chromatographic reagent. It is widely used in medical sterilization due to its rapid action against bacteria, viruses, and spores. OPA is also employed in biochemical research and industrial applications where precise analytical methods are required. Its fluorescent properties make it valuable in chromatography, particularly for detecting amino acids and other biomolecules. OPA is favored over traditional disinfectants like glutaraldehyde for its lower toxicity and faster efficacy, though it requires careful handling due to its corrosive nature.
Physical and Chemical Properties
OPA is a pale yellow to colorless liquid with a distinct aromatic odor. It has a molecular weight of 134.13 g/mol and a density of 1.13 g/cm³. The compound melts at 55-57°C and boils at 266-268°C, making it stable under typical storage conditions. OPA is soluble in water, alcohol, and most organic solvents, which enhances its versatility in formulation. Its high reactivity stems from the presence of two aldehyde groups, enabling it to form stable complexes with primary amines. This property is exploited in both disinfection and chromatographic applications.
Main Applications
OPA's primary use is as a high-level disinfectant for medical instruments, particularly endoscopes, where it achieves sterilization in 5-12 minutes. It is also a key reagent in HPLC and other chromatographic techniques for derivatizing amino acids, enabling sensitive detection. In biochemical research, OPA is used to label proteins and peptides for fluorescence-based assays. Industrial applications include water treatment and preservative formulations. Its effectiveness against antibiotic-resistant pathogens has further expanded its use in healthcare settings.
Safety and Storage
OPA is corrosive and can cause skin, eye, and respiratory irritation. Proper personal protective equipment (PPE), including gloves and goggles, is mandatory during handling. Ensure adequate ventilation to avoid inhalation exposure. Store OPA in a cool, dry place away from light and oxidizing agents. Containers should be tightly sealed to prevent moisture absorption and degradation. Spills must be neutralized with a reducing agent like sodium bisulfite and cleaned promptly.
B2B Procurement Guide
When procuring OPA, prioritize suppliers with ISO or GMP certifications to ensure quality. Verify the purity grade (typically 95-99%) and request technical data sheets (TDS) for batch-specific testing results. Consider bulk purchasing for cost savings, but ensure proper storage facilities are available. Evaluate supplier lead times and logistics, especially for international shipments. Regulatory compliance, such as EPA or FDA approvals, is critical for medical and laboratory applications.
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