Introduction
In pharmaceuticals, daily operations often feel routine, but hidden threats can put people, production, and business at risk. The industry’s use and storage of hazardous materials creates a significant risk of fires and explosions. If these hazards are overlooked or underestimated, the consequences can be devastating – from injuries and property damage to environmental harm and reputational loss.
Even highly regulated facilities with strict safety procedures remain at risk if hazards are not fully considered. These risks go beyond compliance; they threaten lives, assets, and the integrity of your operations.
Common Fire & Explosion Hazards in Pharma
Many everyday pharmaceutical processes carry fire and explosion risks:
Solvent use & vapour explosions: Flammable organic solvents can form explosive vapour clouds when leaks, spills, or poor ventilation occurs.
Powder/dust explosions: Fine powders, including active pharmaceutical ingredients, can ignite if dispersed in the air.
Reactive or thermally unstable chemicals: Certain intermediates may react violently to heat, friction, or shock, causing runaway reactions or spontaneous ignition.
Runaway reactions & process upsets: If not properly monitored, multi-step reactions with high energy intermediates can accelerate uncontrollably.
Static electricity & ignition sources: Dry conditions, plastic equipment, or high-speed powder handling can generate sparks, igniting vapours or dust clouds.
Storage & waste hazards: Incompatible chemicals stored together or improperly handled waste (e.g., contaminated rags, solvent drums) can trigger fires or reactions.
Lessons from Real-Life Incidents
Catalent, Swindon (2019) – Chemical Reaction
A large chemical reaction required 4 fire officers, 1 environmental protection unit, and 10 fire engines to attend and hospitalised a worker. Likely causes include inadequate monitoring, allowing incompatible chemicals to interact.
How could this be prevented?
Process hazard assessments and chemical reaction testing could have identified risks and established safe handling procedures.
SmithKline Beecham, Irvine (2013) – Flash Fire
Two workers suffered burns while mixing a highly reactive chemical with a relatively inert one. The process lacked proper risk assessment, and unsafe methods were used.
How could this be prevented?
Thorough hazard assessment, chemical reaction testing, and clear handling procedures would have mitigated the risk.
Novartis, Horsham (2011) – Laboratory Fire
A fire caused evacuation and extensive lab damage. The exact cause was not officially confirmed, but safety procedures and risk controls were likely inadequate.
How could this be prevented?
Detailed process and equipment risk reviews would have highlighted potential hazards and ensured safe working conditions.
Warning Signs Your Facility May Be at Risk
Even if your processes seem safe, your facility could still be vulnerable to fires or explosions. Key warning signs include:
Frequent static discharges or shocks when handling powders or solvents: Static sparks are a common ignition source, particularly in environments with lots of dusts or solvents. Regular discharges indicate a hazardous working atmosphere that requires investigation. Solutions may include replacing or repositioning equipment, improving grounding, or relocating materials to reduce the risk.
Unexplained pressure rises or temperature excursions in reactors: While some pressure is expected during reactions, unexpected increases may signal residual product, incorrect temperatures, or unsafe process conditions. These events must be carefully assessed to identify underlying causes and implement safe operating measures.
Visible dust accumulation in processing or packaging areas: Fine powders can form highly flammable dust clouds if layers of deposit are disturbed. Dust buildup often indicates inadequate housekeeping or ventilation systems, increasing the risk of fires and explosions.
Strong solvent odours: Persistent odours suggest a solvent spill or inadequate ventilation of vapours. This can affect worker health, create flammable atmospheres, and elevate the risk of an ignition.
Missing or overdue DSEAR/ATEX reviews: Outdated or missing assessments mean safety measures may not reflect current processes. Without accurate risk evaluations, unsafe practices can develop, putting personnel and operations at risk.
Best Practices for Safer Pharmaceutical Operations
To provide the best possible safeguarding for your facility, consider the following measures:
- Conduct calorimetry and explosivity testing for powders, solvents, and intermediates.
- Implement inerting systems and explosion relief where required.
- Ensure all vessels, ductwork, and transfer equipment are properly earthed and bonded.
- Perform regular risk assessments, HAZOPs, and DSEAR compliance checks.
- Train staff to recognise early warning signs of runaway reactions, dust hazards, or ignition risks.
How Sigma-HSE Can Help
Sigma-HSE supports pharmaceutical companies in creating safer operations through:
Explosion & Flammability Testing: Assessing dusts, vapours, and solvents to define safe handling conditions.
DSEAR Risk Assessments & Hazardous Area Classification: Identifying risks and providing clear mitigation steps.
Process Safety Reviews & Training: Tailored assessments and training to embed safe practices across your facility.
Protecting your team, processes, and reputation is essential. Sigma-HSE can help you reduce risks, enhance safety, and maintain a secure, compliant pharmaceutical environment. Get in touch today to find out how our team can help you.
