Packaging and storage—
Each Petrolatum Gauze unit is so packaged individually that the sterility of the unit is maintained until the package is opened for use.
Labeling—
The package label bears a statement to the effect that the sterility of the Petrolatum Gauze cannot be guaranteed if the package bears evidence of damage or has been opened previously. The package label states the width, length, and type or thread count of the Gauze.
Other tests—
The petrolatum recovered by draining in the
Assay has the characteristics of and meets the requirements of the tests under
White Petrolatum. The conditioned gauze obtained in the
Assay meets the requirements of the tests for
Thread count,
Length,
Width, and
Weight under
Absorbent Gauze.
Assay—
Weigh not less than 20 units of Petrolatum Gauze, place them in a heated glass funnel, maintaining the temperature at approximately 75
, and allow the petrolatum to melt and drain from the funnel. Draining may be facilitated by pressing the gauze with a glass rod or porcelain spatula.
Wash the gauze on the funnel with successive portions of warm methyl chloroform until it is free from petrolatum, allow the residual methyl chloroform to evaporate spontaneously, condition the gauze in a standard atmosphere of 65 ± 2% relative humidity at 21 ± 1.1
for not less than 4 hours, and weigh. The difference between the weight of the gauze and that of the Petrolatum Gauze taken represents the weight of petrolatum.
71
:
meets the requirements.