• Chemicals are commonly used in many schools and workplaces. To prevent potential safety problems from occurring, strong chemicals such as acids should be stored properly at all times. If stored improperly, these acids can cause chemical reactions, burns, or toxic fumes. Most acids are kept in containers designed for safe handling. Simply trusting a container to prevent accidents, however, is not enough. To prevent possible spills and reactions, acids should be separated from bases, properly contained, and labeled correctly.
  
  

Base Separation

• Commonly, acids are stored in close proximity to base chemicals. This creates the potential for several problems. Both acids and bases can corrode separately. If acids and bases mix and react, high amounts of heat can cause further damage. Anytime that acid is in storage, it must be completely separated from base chemicals to avoid possible reactions. Common acidic chemicals found in laboratory settings include nitric, hydrochloric, and sulfuric acids. Frequently used base chemicals such as sodium and calcium hydroxide should always be stored separately and only removed when needed.
  
  

Secondary Containment

• To prevent the possibility of adverse reactions, acids should always be stored with secondary containment. This means that even if one layer of containment fails, the acid will remain contained and will not mix with other substances. The most common safeguard for acids is the container itself. Containers holding acids should always be closed with a cap or cover and should not spill if knocked over. The second layer of containment for acids should be separate from the container. Isolated trays or cabinets are examples of secondary containment.
  
  

Storage Labels

• All acids in storage should be clearly marked with distinct labeling to prevent confusion. You should also ensure that chemicals are placed in the correct locations. The labels used to mark acids should be simple to understand at a glance. Shapes and colors are recommended to make labels easy to read. All acids should be marked with the same indicator. Additionally, the strength of the acid should be noted. For example, a highly corrosive acid should be marked with bright coloring whereas milder acids should use duller label colors.