m Advance Copy ( pall) QUALITY CONTROL OF ABSOLUTE BACTERIA REMOVAL FILTERS INTRODUCTION: A chievem ent of b acterio lo g ical ste rility re q u ire s that: A.

Report Entry No. 96 Sample No.

DETECTION OF ASBESTIFORM AMPHIBOLE MINERALS IN COSMETIC GRADE TALC Introduction The method which has been adopted for the detection of amphi bole minerals in cosmetic talc is the generally accepted method of x-ray diffraction.

"Asbestos-Fiber" Concentrations in Talc Number of Chrvsotile Fibers in 99.99% Pure Talc^ 1.1 Talc that is 99.99% pure may contain up to 0.01% chrysotile fibers by weight. 1.2 Therefore, one mg of talc can contain as much as 0.1 ^g of chrysotile fibers: 1 mg x 0.01% chrysotile fibers = 0.1 ^ig of chrysotile fibers. 1.3 The size and shape criteria applied to asbestos fibers states that the fibers must be 5 ^m in length or longer and have a length to width ratio of 3.1.

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Reclaimed Wastes Used for Report Paper We have printed this annual report on paper with a substantial reclaimed waste content. 60% of the content of this paper is from such reclaimed materials as fibers recovered from waste water, wood chips left over from saw mill operations, and paper trimmings left over after cutting paper into sheets and rolls.

MEMORANDUM DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE PUBLIC HEALTH SERVICE FOOD AND DRUG ADMINISTRATION TO Dr.

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ANALYST WORK S H EET i 3.

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