Clean rooms are classified as per ISO and Federal standards 209E
In pharmaceutical dosage form manufacturing company clean room is of very important manufacturing arias. Clean room in pharma is classified according to level of cleanness.
Pharmaceutical Manufacturing area requirement with respect to cleanness class clean room classification is based on particle count in clean room and up on the size of particles as well.
1) Tablets dosage form manufacturing class 100000 clean room is required or it can be said a class 100000 aria suitable for solid oral dosage form.
2) Oral Liquid dosage form: Class 10000 Clean Room is required
3) Topical preparation : Ointment and Cream, dosage form: Clean room of Class 10000 required
4) Parenteral dosage form and injectable dosage form: Clean room of Class 100 required
Clean room is classified with respect to particle count it bare in a one cubic foot of air sampled. The particle size counted or considered of 0.5 micron and above 0.5 micron.
U.S FEDERAL STANDARD 209E CLEAN ROOM CLASSIFICATION IN COMPARISON WITH ISO AND EU CLEAN ROOM GRADES.
ISO |
(Federal Standard 209 E) |
Grade |
Limit of Greater Than or equal to 0.1 μm micron particles |
Limit of Greater Than or equal to 0.2 μm micron particles |
Limit of Greater Than or equal to 0.3 μm micron particles |
Limit of Greater Than or equal to 0.5 μm micron particles |
Limit of Greater Than or equal to 5 μm micron particles |
||
|
|
Per Cubic meter |
Per Cubic meter |
Per Cubic meter |
Cubic meter |
Cubic foot |
Cubic meter |
Cubic foot |
|
ISO3 |
1 |
– |
1000 |
237 |
102 |
4 |
NA |
NIL |
NIL |
ISO4 |
10 |
– |
10000 |
23700 |
1020 |
35 |
1 |
|
|
ISO5 |
100 |
A at working condition B at Rest |
100000 |
237000 |
10200 |
3530 |
100 |
NIL |
NIL |
ISO6 |
1000 |
|
1000000 |
NA |
102000 |
35300 |
1000 |
247 |
7 |
ISO7 |
10000 |
C |
NA |
NA |
NA |
353000 |
10000 |
2470 |
70 |
ISO8 |
100000 |
D |
NA |
NA |
NA |
3530000 |
100000 |
24700 |
700 |
Example: inject able aseptic filling aria, (laminar air flow work bench with HEPA filter efficiency of 99.99 % of 0.3 micron) 450 to 500 air changes per hour are required to maintain the level of cleanness to class 100
2) Class 1000 Clean room
Class 1000 is a clean room with particle count below 1000 number of particles found in its air equivalent to 1 cubic foot or below 35300 particles in cubic meter of air tested. The particle size being counted is 0.5 micron and above and no particle of size 5 micron (nil count). 7 particles of size range 5 micron in 1 cubic foot or 247 particles of size rang 5 micron in cubic meter of air tested.
3) Class 10000 Clean room
Class 10000 is a clean room with particle count below 10000 numbers of particles found in its air equivalent to 1 cubic feet or below 353000 particles in cubic meter of air tested. The particle size being counted is 0.5 micron and above. And no particle of size 5 micron (nil count). 70 particles of size range 5 micron in 1 cubic foot or 2470 particles of size rang 5 micron in cubic meter of air tested
4) Class 100000 Clean room
Class 100000 is a clean room with particle count below 100000 numbers of particles found in its air equivalent to 1 cubic feet or below 3530000 particles in cubic meter of air tested. The particle size being counted is 0.5 micron and above. And no particle of size 5 micron (nil count). 700 particles of size range 5 micron in 1 cubic foot or 24700 particles of size rang 5 micron in cubic meter of air tested
European Union classification of clean room:
European Union good manufacturing practices guidelines classification of clean room define on the basis of particle count observed not only at working condition of clean room but it also require to comply particle count at rest condition
Clean room classification Table
Class
|
Limit of particles AT REST
|
Limit of particles
AT Operation
|
||
Number of 0.5 micron equal or above particles/ Cubic meter
|
Number of 5 micron equal or above particles/ Cubic meter
|
Number of 0.5 micron equal or above particles/ Cubic meter
|
Number of 5 micron equal or above particles/ Cubic meter
|
|
A
|
3500
|
0
|
3500
|
0
|
B
|
35000
|
0
|
350000
|
2000
|
C
|
350000
|
2000
|
3500000
|
20000
|
D
|
3500000
|
20000
|
NA
|
NA
|
Class A Clean room
At rest:
Maximum allowable number of particles of 0.5 micron or above size in cubic meter of air tested = 3500
Maximum allowable number of particles of 5 micron in cubic meter of air tested = 0 “ZERO”
In operation:
Maximum allowable number of particles of 0.5 micron or above size in cubic meter of air tested = 3500
Maximum allowable number of particles of 5 micron in cubic meter of air tested = 0 “ZERO”
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Class B Clean room
Class B is provided just adjacent to Class A where cortical activity is done like feeling of injectable liquid or powder for injection in vials or Blow filling and sealing activity under laminar flow bench which provide class 100 environment, but surrounding to LAF Class B is required to maintained.
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Class C Clean room
At rest :
Maximum allowable number of particles of 0.5 micron or above size in cubic meter of air tested = 350000
Maximum allowable number of particles of 5 micron in cubic meter of air tested = 2000
In operation:
Maximum allowable number of particles of 0.5 micron or above size in cubic meter of air tested = 3500000
Maximum allowable number of particles of 5 micron in cubic meter of air tested =20000
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Class D Clean room
At rest:
Maximum allowable number of particles of 0.5 micron or above size in cubic meter of air tested = 3500000
Maximum allowable number of particles of 5 micron in cubic meter of air tested = 20000
In operation:
Maximum allowable number of particles of 0.5 micron or above size in cubic meter of air tested = Not set.
Maximum allowable number of particles of 5 micron in cubic meter of air tested =Not set.
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