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MENUGrade D CleanRoom
A Class D cleanroom is the lowest grade of controlled environment under Good Manufacturing Practice (GMP) regulations. Typically classified as ISO Class 8, Class D cleanrooms are used in manufacturing processes where the level of cleanliness does not need to be as stringent as higher-class environments (A, B, or C). These cleanrooms are still essential for controlling contamination but are used in less critical activities, particularly for non-sterile products or processes that do not involve direct aseptic handling.
Pharmaceuticals: Secondary packaging, preparation of non-sterile drugs, and labeling.
Biotechnology: Preparation of culture media, buffers, and non-sterile bioprocessing.
Medical Devices: Assembly and packaging of non-sterile devices.
Cosmetics: Packaging and filling of non-sterile products.
Food Processing: Packaging of non-sterile food products.
Electronics: Assembly and packaging of electronic components.
R&D: Conducting experime
Clean room grade table
| ISO Class FED STD 209E Equivalent | |||||||
| ISO Class | Maximum Particles/m | FED STD 209E equivalent | |||||
| ≥0.1μm | ≥0.2um | ≥0.3um | ≥0.5um | ≥11m | ≥5um | ||
| ISO1 | 10 | 2 | |||||
| ISO2 | 100 | 24 | 10 | 4 | |||
| ISO3 | 1,000 | 237 | 102 | 35 | 8 | Class1 | |
| ISO4 | 10,000 | 2,370 | 1,020 | 352 | 83 | 3 | Class10 |
| ISO5 | 100,000 | 23,700 | 10,200 | 3,520 | 832 | 29 | Class100 |
| ISO6 | 1,000,000 | 237,000 | 102,000 | 35,200 | 8,320 | 293 | Class 1,000 |
| ISO7 | 352,000 | 83,200 | 2,930 | Class10,000 | |||
| ISO8 | 3,520,000 | 832,000 | 29,300 | Class 100,000 | |||
| ISO9 | 35,200,000 | 8,320,000 | 293,000 | Room Air | |||
| Comparison Table GMP/USP/ISO/FED209E | ||||||||||||
| project | China GMP/Europe GMP | ISO | FED STD 209E | |||||||||
| Suspended particles P/m3 | level | Static | dynamic | level | Static | level | dynamic | |||||
| ≥0.5um | ≥5μm | ≥0.5μm | ≥5μm | ≥0.5um | ≥5μm | ≥0.5um | ≥5μm | |||||
| A | 3520 | 20 | 3520 | 20 | M3.5 | 3530 | 100 | 5 | 2220 | 20 | 100 | |
| B | 3520 | 29 | 352000 | 2900 | - | - | 6 | 3520 | 29 | 1000 | ||
| C | 352000 | 2900 | 3520000 | 29000 | M5.5 | 353000 | 10000 | 7 | 352000 | 2930 | 10000 | |
| 8. | 3520000 | 29300 | 100000 | |||||||||
| D | 3520000 | 29000 | No regulations | No regulations | M6.5 | 3530000 | 100000 | 9 | 3520000 | 29300 | 100000 | |
Comparison table of ISO grade standards and ventilation times | |
| ISO Class | ACH(AIRCHANGE PER HOUR) |
| ISO 3 | 360-540 |
| ISO 4 | 300-540 |
| ISO 5(GMP Class A) | 240-480 |
| ISO 6(GMP Class B) | 50-60 |
| ISO 7(GMP Class C) | 30-40 |
| ISO 8(GMP Class D) | 15-25 |
Key Characteristics of Class D Clean Room
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Class D cleanrooms are classified as ISO Class 8, which allows for up to 3.5 million particles per cubic meter for particles ≥0.5 microns. This level of cleanliness is sufficient for processes where product sterility is not a concern, but where contamination control is still necessary. |
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Class D environments generally have between 20 to 30 air changes per hour to maintain airflow and minimize contamination risk. |
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Class D cleanrooms are generally maintained at a positive pressure relative to adjacent, lower-grade environments (e.g., Class D). This ensures that air does not flow from less clean areas into the Class D room, preventing contamination from external sources. |
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The gowning requirements in Class D cleanrooms are less strict than those in higher-class cleanrooms (A, B, or C). Personnel typically wear basic protective gear, such as lab coats, gloves, and hair covers, but may not need the extensive gowns or suits required for aseptic environments |
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Secondary Packaging of Non-Sterile Pharmaceutical Products: Class D cleanrooms are frequently used for the secondary packaging of pharmaceutical products such as tablets, capsules, or blister packs. These products may not require sterile conditions but must still be handled in a clean environment to avoid contamination from airborne particles, dust, or microbes. |
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Non-Sterile Bioprocessing: In the biotechnology industry, Class D cleanrooms are used for non-sterile bioprocessing tasks, such as the preparation of culture media, buffers, and other materials used in bioreactors or fermentation. Cell Culture Preparation: The preparation of cell culture media, reagents, and buffers, which are often used in downstream bioprocessing applications, can be conducted in Class D cleanrooms. |
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Class D cleanrooms are used for assembling non-sterile medical devices, such as diagnostic equipment, surgical tools, or other healthcare products, before they undergo sterilization in a higher-grade cleanroom (Class A or B). These cleanrooms help ensure that devices are free from excessive contamination during assembly. |
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Some cosmetic products, such as lotions, creams, and non-sterile ointments, may be produced or packaged in Class D cleanrooms. These cleanrooms help reduce contamination risks while ensuring that the final product is safe and free from visible contamination. |
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Packaging of Non-Sterile Foods: Class D cleanrooms can also be used for packaging certain types of food products that are not sterile but require a clean environment to minimize contamination during the final stages of production. This might include handling or packaging of certain supplements, dietary products, or snack items. |
GMP Class D Clean Room Wall
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GMP Class D Clean Room Celling
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FAQ
Q: What does Class D mean in a cleanroom?
A: In the context of pharmaceutical manufacturing, Class D refers to the least controlled environment in the GMP classification system (i.e. ISO Class 8 cleanrooms). Processes performed in environments classified as Class D are assumed to generate no product contamination and to have no effect on product purity. Class D classified environments are employed for the manufacture and handling of non-sterile products (i.e. product packaging, storage, etc.).
Q: What is the correlation between Grade D and ISO 8?
A: As defined by ISO 14644, ISO Class 8 classifies air as being made up of 3.5 million particles per cubic meter of 0.5 micron and larger size. Class 8 is usually considered a 'not-quite-so-clean' environment and is permitted for a host of activities where process and product contamination is to be kept to an acceptable level.
Q: What are the requirements for Grade D cleanroom gowning?
A: As compared to the grooming requirements in a higher-grade cleanroom, the requirements for grooming in a Grade D cleanroom is considered to be relatively unrestricted. Personnel often wear protective clothing, including a lab coat, gloves, and head and shoe covers. The grooming and donning of protective clothing is often not closely monitored or controlled, as the potential for product or process contamination is considered to be relatively low in a Grade D environment.
Q: What is a Class C cleanroom?
A: A Class C cleanroom is an ISO Class 7 environment that helps in production of product where aseptic conditions need not be maintained. These types of cleanrooms are seen in production of non-sterile pharmaceutical products. Controlled levels of environmental contamination are allowed in Class C cleanrooms and hence they are suitable for processing of non-sterile pharmaceutical products, e.g. dilution, mixing and packaging of products.
Q: What are the classes of cleanrooms?
A: There are different grades of cleanrooms. Contamination level is inversely proportional to the grade of cleanroom. Lower the grade of cleanroom, less will be the allowable level of contamination. Class 1 (ISO) cleanrooms allow least contamination, whereas Class 9 allow highest level of contamination. Cleanrooms are also classified by Good Manufacturing Practices (GMP) into Class A, B, C and D. Class A cleanrooms are suitable for production of products to be introduced into the sterile environment and other products where even minimum contamination is not acceptable, e.g. vaccines. Class B cleanrooms are used for the production of parenteral products and other pharmaceutical products which require a high level of contamination control. Class C cleanrooms are used for production of non-sterile pharmaceutical products and Class D cleanrooms are used for final processing of medical devices and other products which require the least level of contamination control.
Q: What is Type C cleaning in pharma?
A: Type C cleaning in pharmaceutical industry is a cleaning process for surfaces which do not come in contact with pharmaceutical products in a sterile condition. In pharmaceutical industry, Type C cleaning is done in Class C cleanrooms.
Q: What are the FDA classifications for cleanrooms?
A: The FDA classifies cleanrooms for the manufacturing of different categories of pharmaceutical products based on the required level of cleanliness. The FDA classifications for cleanrooms are similar to the classifications defined by the International Organization for Standardization (ISO). Cleanrooms classified as A and B are considered as sterile processing cleanrooms and are used in manufacturing products requiring aseptic processing. C and D classified cleanrooms are used for processing and packaging of non-sterile products.
Q: What does Class D stand for?
A: Class D classified cleanrooms are classified as ISO Class 8. Class D classified cleanrooms are used in processes where, within a controlled environment, the product can be handled without gross contamination.
Q: What is a Class D room classification?
A: A Class D room classification signifies that the room has an environment controlled to ISO Class 8. Class D rooms are generally used in processes that require contamination controls, but not required to have a sterile environment. Some examples of processes that are performed in Class D rooms are storage of raw materials and finished non-sterile products, or processing and packaging of non-sterile products.
Q: What does Class D mean?
A: Class D refers to an ISO Class 8 cleanroom. ISO Class 8 cleanrooms allow for greater contamination in comparison to other classes. A cleanroom of Class 8 allows for 3,500,000 particles of 0.5 microns or larger in 1 cubic meter of cleanroom space. Class D cleanrooms are used for processes that require better contamination control. For example, Class D cleanrooms are used for processes that involve packaging and storage of products that are not sterile.
Q: Give examples of applications of Class D cleanrooms?
A: Class D cleanrooms are used for processes that require better contamination control such as non-sterile packaging and storage. Examples include final packaging of pharmaceuticals and medical devices.
Q: What is a Grade D cleanroom?
A: Grade D and Class 8 cleanrooms are identical. Grade D cleanrooms are used for processes that require better contamination control, but not for processes that require full sterile control. Therefore, they are used for final packing and storage of products that are not full sterile, such as in the pharmaceutical industry.
Q: What does a Class D area mean?
A: An area defined as Class D or ISO Class 8 is a controlled environment for processes that require better contamination control, for example, final packing of non-sterile products.
Q: What is a Class A cleanroom?
A: ISO Class 5 cleanrooms, also known as Class A cleanrooms, are the most controlled and clean environments, classified as ISO Class 5. These types of cleanrooms are used for processes like sterile drug production or aseptic filling where the product being manufactured must be free from any type of contamination.
Q: What are the different types of cleanrooms?
A: The classification of cleanrooms is determined by the level of contamination allowed in a given environment. In the ISO 14644-1 standard, the classes range from 1 through 9 with 1 being the most stringent, and 9 being the least stringent. For pharmaceutical and related industries, cleanrooms are classified as A, B, C, and D, with class A cleanrooms being the most stringent class for a sterile environment.
