Laboratory work should begin only after trained personnel evaluate chemical, biological, physical, and procedural hazards. The assessment should consider material uncertainty, quantity, form, exposure routes, equipment, and the consequences of spills or equipment failure.

Work must follow applicable law, institutional policy, approved protocols, and the site-specific safety program. Research-use materials are not intended for human or veterinary administration.

Risk reduction should prioritize elimination or substitution where feasible, followed by engineering controls, administrative controls, and personal protective equipment. PPE is important but is not a replacement for suitable facilities or procedures.

Engineering controls may include containment or local ventilation selected by qualified safety personnel. Administrative controls include access restrictions, written procedures, training, signage, and scheduling.

Containers should carry a durable identifier, material name, batch, concentration where applicable, date, owner, storage requirement, and hazard information required by the laboratory program. Secondary containers and prepared samples need equivalent traceability.

Maintain an inventory that records receipt, location, transfers, use, and disposition. Segregate and dispose of waste through approved channels based on the facility’s hazard assessment; never improvise disposal practices.

Before work starts, personnel should know the alarm, isolation, evacuation, spill-response, first-aid, and reporting procedures applicable to the facility. Only trained and equipped personnel should respond within the limits of the approved plan.

Report exposures, spills, near misses, equipment failures, and labeling errors promptly. Preserve relevant records and use documented review to correct immediate conditions and prevent recurrence.