Chemicals are essential components of school science laboratories; however, inadequate inventory management and improper storage may pose risks to human health, laboratory safety, and the environment. This study assessed chemical inventories, expired chemicals, and storage safety practices in eight secondary school laboratories in Tobruk City, Libya. A descriptive survey was conducted using direct observation, structured interviews, and a standardized chemical inventory checklist. The assessment focused on the quantities, expiration status, hazard classifications, physical condition, and storage practices of solid chemicals. A total of 132 solid chemicals, with a combined mass of 182.951 g, were recorded. Of this inventory, 27.611 g (14.52%) consisted of expired chemicals, indicating deficiencies in inventory control and chemical waste management. The proportion of expired chemicals varied considerably among schools, reaching 57.53% at Bab Al-Zaytoun School. Hazard classification showed that flammable chemicals represented the largest category (49.33%), followed by corrosive (32.87%), toxic (9.14%), and explosive (8.88%) chemicals. The assessment also identified shortcomings in chemical storage, segregation, and safety management. Although some chemicals showed visible signs of deterioration, their chemical stability could not be confirmed through visual inspection alone. These findings highlight the need for updated chemical inventories, regular expiration-date inspections, appropriate chemical segregation, and safe disposal procedures for expired chemicals. Regular safety training for laboratory personnel is also necessary to improve chemical handling and risk prevention. Strengthening inventory management and storage practices is essential for reducing chemical hazards and improving the safety of secondary school laboratories in Tobruk City, Libya.................... KEYWORDS: .................Chemical inventory, chemical storage, expired chemicals, hazardous chemicals, laboratory safety.