Lab Safety and Chemical Handling

Introduction

• Quote by Ben Franklin: "By failing to prepare, you are preparing to fail."
• Importance of preparation for lab activities.
• Key preparatory steps include assessing risks, wearing appropriate PPE, and understanding protective measures and emergency responses.

Handling Chemicals

• Diluting Acids/Bases: Always add acid/base to the solvent.
  • Pouring solvent into acid/base can cause violent reactions.
• Transporting Chemicals: Use break-resistant secondary containers.
• Exposure Prevention:
  • Avoid skin, eye, or inhalation exposure.

Eye Protection

• Safety glasses with side shields offer some protection.
• Splash Hazards:
  • Use splash goggles marked Z87.1 (ANSI compliant) for better protection.
  • Prescription glasses are insufficient; overlay with safety glasses or goggles.

Skin Protection

• Corrosive Chemicals: Harmful upon contact.
  • Lab coat and gloves provide some protection.
  • For splash hazards, use a full-length chemical-resistant lab apron.
  • Full arm-length rubber gloves recommended for highly corrosive chemicals.

Inhalation Exposure

• Avoid smelling chemicals.
• Use fume hoods for toxic chemicals.
• Keep containers tightly closed when not in use.

Chemical Spills

• Large Spills:
  • Evacuate and seal off lab.
  • Notify authorities.
  • Do not re-enter until cleared by supervisor.

Flammable Chemicals

• Know flammability and explosive potential.
• Keep away from ignition sources (e.g., Bunsen burners).
• Store in dedicated, grounded storage cabinets.

Disposal of Chemicals and Waste

• Follow federal, state, local, and institutional requirements.
• Use chemical-resistant containers for disposal.
• Do not evaporate solvents under fume hoods.
• Dispose of materials used in spill clean-up as hazardous waste.

Conclusion

• Preparation is crucial for safe chemical handling.
• Understand the chemicals, handling procedures, and emergency responses.
• Next lesson will cover other common lab hazards.