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Technical Data, Closures
Gray Bromobutyl / 39 with Complete Coat
Pros:
Low gas and vapor permeablilty, good for multiple piercing applications,
compatible with most cephalosporin's, resistant to animal, vegetable, and mineral oils,
good resistance to aliphatic, aromatic and chlorinated solvents
Cons:
Not recommended for use with ketones.
Gray Bromobutyl / 46
Pros:
Low gas and vapor permeablilty, good for multiple piercing applications, excellent
moisture absorption and desorption properties following autoclave and lyophilization
drying cycles.
Cons:
Poor resistance to mineral oil, aliphatic, aromatic, and chlorinated solvents.
Gray Bromobutyl / 47
Pros:
Low gas and vapor permeablilty, great for multiple piercing applications
after gamma irradiation, ultra low extractable compound, compatible with most
cephalosporin's, very good moisture absorption and desorption properties following
autoclave and drying cycles, compatible with WFI applications.
Cons:
Poor resistance to mineral oil, aliphatic, aromatic, and chlorinated solvents.
Gray Bromobutyl / 50
Pros:
Low gas and vapor permeability, very good properties regarding ozone, animal
and vegetable oil.
Cons:
Not good for multiple piercing applications, poor resistance to mineral oil,
aliphatic, aromatic and chlorinated solvents.
Gray Bromobutyl / 52
Pros:
Low gas and vapor permeablilty, very good properties regarding ozone, animal
and vegetable oil.
Cons:
Not good for multiple piercing applications, poor resistance to mineral oil,
aliphatic, aromatic, and chlorinated solvents.
Gray Chlorobutyl / 46
Pros:
Low gas and vapor permeability, good for multiple piercing applications, resistant
to animal and vegetable oils, good for lyophilization applications.
Cons:
Poor resistance to mineral oil, aliphatic, aromatic, and chlorinated solvents.
Gray Chlorobutyl / 49
Pros:
Low gas and vapor permeablilty, resistant to animal and vegetable oils.
Cons:
Poor resistance to mineral oil, aliphatic, aromatic, and chlorinated solvents.
Gray Chlorobutyl / 50
Pros:
Low gas and vapor permeability, resistant to animal and vegetable oil, good for
lyophilization applications.
Cons:
Poor resistance to mineral oil, aliphatic, aromatic, and chlorinated solvents.
Gray Chlorobutyl / 55
Pros:
Low gas and vapor permeability, resistant to animal and vegetable oil, good for
lyophilization applications.
Cons:
Poor resistance to mineral oil, aliphatic, aromatic, and chlorinated solvents.
Gray Chlorobutyl / Isoprene Blend / 40
Pros:
Good coring characteristics, fair resistance to gas and moisture transmission
compared to red isoprene.
Cons:
Contains dry natural rubber.
Gray Chlorobutyl / Isoprene Blend / 40 with FEP Facing
Pros:
Barrier properties of FEP, good coring characteristics, fair resistance to gas and
moisture transmission compared to red isoprene.
Cons:
Contains dry natural rubber.
Gray Chlorbutyl / Isoprene Blend / 50
Pros:
Good coring and reseal characteristics, fair resistance to gas and moisture
transmission compared to red isoprene, good for lyophilization applications.
Cons:
Contains dry natural rubber.
Black FKM / 55
Pros:
Low gas and vapor permeability, resistant to animal, vegetable and mineral oil,
aliphatic, aromatic, and chlorinated solvents, good for high heat applications.
Cons:
Not recommended for ketones.
Pink Natural / 48
Pros:
Good coring and very good reseal characteristics.
Cons:
Contains dry natural rubber, not good for use with solvents.
Red Natural / 39
Pros:
Good reseal characteristics.
Cons:
Contains dry natural rubber, not good for use with solvents.
Rubber Stopper Formulation Descriptions
Listed below are the primary stopper formulations with general descriptions that are supplied by WHEATON.
A
A
A
A
A
A
A
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
D
D
D
D
C
C
C
C
D
C
C
C
C
D
D
D
D
WHEATON
800.225.1437 (U.S. & Canada Only) | 856.825.1100 | 856.825.1368 (F) |
www.wheaton.com