Pharma Cold Storage: WHO-GMP Compliance Guide
Pharma Cold Storage: WHO-GMP Compliance Requirements
The pharmaceutical cold storage facility is greater than a room that is only refrigerated. It is a controlled environment established to keep medications and temperature-sensitive products safe during storage and handling.
For pharmaceutical businesses, even a minor change in temperature can create a major issue. If the proper storage environment is not in place, it is likely that product quality, durability, stability, documentation, and regulatory compliance will be affected.
That is why the concept of a pharma cold room must be planned from the very start of any construction work — it cannot just be an afterthought.
The World Health Organization recommends that pharmaceuticals must always be stored within the prescribed conditions and that suitable systems must be used for temperature mapping and qualification.
WHO-GMP considerations could be useful for companies that plan to build or modify their facility because such knowledge would allow creating storage conditions that are more suitable for qualification, monitoring, operation, and auditing.
What Is Pharma Cold Storage?
Key Concepts and Fundamentals
Pharma cold storage means a storage that is temperature-controlled and is suited for the storage of medicines, vaccines, biological products, APIs, or other products in the pharmaceutical industry that require storage under particular environmental conditions.
The temperature needs will differ depending on the category of pharmaceutical product that needs to be stored. The storage also should take into account the instructions on the product label or the specifications of the manufacturer.
The WHO-recommended descriptive limits comprise storage at a temperature of about 5 ± 3°C, -20 ± 5°C in the freezer, and -70 ± 10°C in the deep-freezer. They are only recommendations and not absolute requirements for all products.
A well-conceived facility, thus, begins from the product profile. In defining your room requirements, one must take into account:
- Temperature range needed
- Volume of products and storage space
- Packing configuration and pallets' installation
- Loading and unloading frequency
- Access points needed
- Airflow and temperature distribution
- Monitoring requirements and alarms
- Backup power
- Qualification and validation arrangements
This concept is especially essential in the case of a WHO-GMP pharmaceutical cold room, where the cooling unit represents only a portion of the whole controlled storage system.
Why Pharma Cold Storage Matters for WHO-GMP Compliance
Protecting Product Quality and Stability
Pharmaceutical products are susceptible to different environmental factors including temperature change, freezing, excessive heat, humidity, exposure to light, etc.
WHO Good Storage and Distribution Practices emphasize that medication should be stored and transported in accordance with conditions stated by the manufacturer or product label.
The compliant storage strategy must therefore tackle the following question: Can the facility consistently maintain the required conditions throughout the actual storage area?
Just setting up a cooling unit and showing the temperature reading on one control panel is not an answer to that question.
An appropriate design takes into account the whole storage area, including possible hot and cold spots, air flow, door openings, and product placement.
WHO-GMP Pharma Cold Room Requirements
Temperature Mapping and Monitoring
Mapping temperature is a significant aspect of temperature-controlled storage qualification procedures.
According to WHO guidelines, temperature mapping is obligatory for all buildings that have temperature-sensitive products, namely cold storage and freezing rooms, temperature-controlled warehouses, quarantine, and relevant receiving and loading areas. The essence of temperature mapping is to study the temperature distribution of the area being mapped and detect hot or cold spots.
An ordinary assignment of mapping typically includes the following:
- Establishing the perimeter and working factors.
- Choosing capable data-loggers.
- Locating sensors in different parts of the volume of storage space.
- Keeping the records of temperature in a required time.
- Finding out the areas of heat and cold.
- Comparing the data received with the product specification.
- Taking appropriate action when necessary.
- Deciding on appropriate location of monitoring points.
WHO also describes temperature mapping and monitoring as integral to appropriate pharmaceutical storage conditions.
Refrigeration, Airflow and Room Design
Refrigeration should be designed according to the real conditions of the room.
Key considerations during the design process are:
- Dimensions of the room and volume
- The load of the product
- Ambient conditions
- Size of the door as well as the frequency of opening
- Heat produced by lighting and gadgets
- Temperature of entry of the product
- Location of evaporator
- Air circulation
- Insulating performance
- Required range of temperature
Airflow is the most important. A cold room may have satisfactory readings at one sensor while the rest of the room may vary in temperature.
That is why evaporator positioning, air throw, return air ducts, rack positioning, and clearance need to be taken into account.
If you're specifying equipment for a pharmaceutical build, our Cold Storage Refrigeration Units page covers capacity ranges and specifications sized to your temperature range and load.
How to Plan a WHO-GMP Pharma Cold Storage Facility
Step-by-Step Planning Approach
- Define the product requirements. Immediately determine product-specific storage conditions rather than selecting refrigeration equipment first.
- Calculate the required capacity. Take into account existing inventory and future growth, as well as pallets, shelves, aisles, access space, and working clearances.
- Plan the room layout. Separate receiving, quarantine, storage, dispatch, and other necessary points according to the facility's operations model and quality requirements.
- Design the refrigeration system. In calculating the refrigeration capacity, one should bear in mind the loads from transmission, infiltration, product loads, lighting, people, equipment, and other thermal loads.
- Plan airflow. Avoid placing products in areas with restricted airflow that could disrupt the desired temperature conditions. Make sure there is reasonable air circulation around products.
- Install monitoring systems. Temperature sensors and equipment needed for data logging, alarm signalling, and monitoring should be selected on the basis of the risk and quality requirements considered for the facility's safety.
- Perform qualification and mapping. The completed storage area must be evaluated according to specific operating parameters so it can be demonstrated that the necessary temperature range will be maintained.
- Establish operating procedures. SOPs ought to contain information about monitoring, responding to alarms, temperature fluctuations, access, cleanliness, upkeep, product handling, and record-keeping.
Best Practices for Pharma Cold Storage
Design for Compliance From the Beginning
The best way to proceed is to incorporate aspects of compliance in the design phase of the project.
The proper planning should include:
- Temperature zones wherever necessary
- Sufficient insulation and correctly functioning doors
- Proper movement of goods
- Wide aisles in the storage area
- Correct placement of sensors
- Alarm systems
- Data recording
- Emergency procedures
- Contingency planning
- Preventive measures
- Calibration and verification
- Documentation of qualification
The loading and unloading area is another critical factor. Opening the doors often can cause warm air to enter and affect the temperature of the rooms. A well laid-out entry area that is monitored, together with proper operational processes, would minimize this risk.
WHO's recommendation outlines the necessity of maintaining the right environment in distribution and monitoring temperature-sensitive items through the whole supply chain.
Pharma Cold Storage: Common Challenges and Solutions
Managing Temperature Excursions
Temperature deviations can happen due to faulty equipment, long door openings, power cuts, poor air circulation, improper loading, or insufficient cooling capacity.
Any facility should have a documented response process in place.
In the context of an excursion, the team should ascertain:
- The duration of the excursion
- The peak temperature attained
- The affected product(s)
- The availability of monitoring record(s)
- The need for a quality evaluation
- The corrective/preventive measures that must be taken
The response must rely on written processes and the specifications of the product, as opposed to merely cooling the room down to its normal temperature.
Avoiding Hot and Cold Spots
Poor placement of equipment or excessive storing can hinder airflow.
Temperature mapping has its usefulness since it shows the real temperature distribution instead of assuming it. WHO also highlights that mapping can help identify the places that need correcting, including issues with air distribution.
Power Failure and Equipment Downtime
In addition to the usual aspects of operating a pharmaceutical plant, it is important to pay attention to what would happen in case of a power failure.
The measures to be taken will depend on the results of a risk assessment and may include:
- Emergency generators
- Emergency refrigeration services
- Temperature alarm systems
- Remote alerts
- Emergency transfer procedures
- Clearly defined tasks for personnel
It is not merely about having a backup system. The whole response process needs to be written down and tested.
Industry Trends in Pharma Cold Storage
Smarter Monitoring and Data-Driven Facilities
Pharmaceutical storage facilities today are opting for continuous temperature monitoring methods, electronic data logging techniques, remote alerts, and centralized visibility.
Temperature mapping methods provided by WHO are evolving to help with structured mapping of cold-chain facilities and storage areas.
For facility owners, the crux of the issue is that technological tools must back up the quality system but not supplant it.
A sophisticated monitoring system can never substitute for bad design of the space, inadequate air circulation, incorrect placement of sensors, or insufficient qualification of the staff.
The most effective method incorporates:
- Effective refrigeration system design
- Correct storage configuration
- Competent equipment
- Monitoring systems
- Documentation
- Trained staff
- Continuous review and maintenance
Frequently Asked Questions About Pharma Cold Storage
Is pharma cold storage the same as a normal cold room?
No. It is crucial that a pharmaceutical cold room is constructed in accordance with certain specific requirements such as the storage condition of refrigerants, quality assurance processes, and a well-documented method of observation. A regular commercial cold room does not possess preventive measures and documentation suitable for pharmaceutical cold room operation.
What temperature is required in a pharma cold room?
The product itself should determine the temperature. The World Health Organization has set the optimal limit for storing refrigerated products at 5 ± 3°C unless there are different instructions on the label or from the manufacturer.
Is temperature mapping necessary for a WHO-GMP pharma cold room?
Temperature mapping plays an important role in the qualification process for environments that have temperature-controlled storage. WHO specifically states that cold rooms and other storage areas dealing with products at certain temperatures have to be temperature mapped.
What should be monitored in pharmaceutical cold storage?
In addition to temperature, the plan for monitoring should involve risk assessment of products and facilities. Depending on the case, there might also be a need to monitor parameters such as humidity, alarms, equipment status, access, and other environmental or operational characteristics.
How can hot spots be identified?
A successful temperature mapping process makes use of several data loggers that are strategically placed around the storage area. The information collected through the data loggers makes it possible to identify hot and cold spots.
What happens during a temperature excursion?
The assessment of impacted products must be carried out with reference to established methods and the specific requirements the product may need to comply with. Some important factors influencing product quality are the time and extent of the excursion, temperature information, and product stability characteristics.
What should be considered before designing a pharma cold room?
The planning of a pharmaceutical cold storage facility begins with understanding its product requirements, such as capacity, temperature range, area of the room, heat load calculations, airflow, door movement, monitoring of the equipment, alarm systems, qualification, and backup plans.
Conclusion
Believe it or not, reliable pharma cold storage facilities depend on proper planning, not just on refrigeration equipment.
The room, refrigeration, airflow, monitoring, temperature mapping, processes, and procedures all need to be coordinated for pharmaceutical purposes. In this regard, the rules provided by WHO refer to conditions that must "be stored properly" and cover monitoring and mapping methods for the temperature-controlled storage of pharmaceuticals.
The first step for companies that intend to set up a WHO-GMP pharmaceutical cold room is to determine the type of product, temperature, volume, process, and compliance criteria to be followed before proceeding with the design and the refrigeration equipment selection. Such facilities will make qualification processes easier to achieve, improve temperature control, decrease risks, and ensure the reliability of the temperature-controlled pharmaceutical storage environment.
Singhania Refrigeration designs and supplies refrigeration systems for WHO-GMP pharmaceutical cold storage facilities across Delhi NCR, and can help you specify the right equipment for your temperature and capacity requirements. Explore our Cold Storage Refrigeration Units range, or get in touch to discuss your project.
 Store How It Works & Benefits.avif)
