By T.P. Nelson
This ebook describes substitute formulations and packaging recommendations for the aid or removal of chlorofluorocarbon (CFC) use as an aerosol propellant. Use of CFCs in particular different types of aerosols thought of ''nonessential'' was once banned by way of the U.S. in 1978. contemporary renewed curiosity in additional lowering around the globe creation and intake of CFCs, and different chemical compounds implicated within the depletion of the earth's stratospheric ozone layer, is chargeable for this examine, which covers at present exempted and excluded CFC aerosol purposes and their possible choices.
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Extra resources for Alternative Formulations And Packaging To Reduce Use Of Chlorofluorocarbons
Hx. Crc-113 828 181 or IICFC-22 708 168 CFC-113 HCFC-142b HGFC-22 148 If HCFC-lZ3 b e c o w s co-rcially a v a i l a b l e , this nonflammable l i q u i d could be f o d r t e d as follows: XI. 838 178 HCFC-123 HCFC-22 A l t e r n a t i v e l y , the following replacement f o d a can be o f f e r e d : XXI. 608 308 108 HCFC-141b HCFC-123 HCFC-22 A f i n a l a l t e r n a t i v e takes advantage of t h e - h i g h - p r e s s u r e azeocrope o f HCFC-2Z/Ptopano (68:32). which h u a p r e s s u r e of about 135 p s i g at 70'F and t h e r e f o r e cannot be added t o a e r o s o l cans except as i n d i v i d u a l i n g r e d i e n c s .
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Radio. servomotor. computer, airplane controls. and ocher sensitive. costly, or sparking types of equipment. The three classes of meter-spray inhalant aerosols used for medical purposes can bo defined as follows: Metered-dose steroid human drugs for oral inhalation; Metered-dore steroid huaur drugs for nasal inhalacion; and Metered-dose adrenergic bronchodilator human drugs for oral inhalation. Information from the H u k e l l Idoratories Division of DuPont shows che equivalence of nasally and orally inhaled drugs of the steroid types; chey are generally identical except for che plaseic nose or mouthpiece.