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OCR for page 11
11 Name: AMMONIA, ANHYDROUS CAS No.: 7664-41-7 Chemical Formula: Description NH3 NAS/CWIC 002-82 Formula Weight : 17.0 A colorless, liquified gas that is corrosive and has an irritating, pungent odor. Ammonia gas is capable of forming explosive mixtures with air. It is available at a commercial strength of 99.5% NH3. Use: Used with chlorine during disinfection for control of trihalomethanes, tastes, and odors. Purity Requirements: A maximum dosage of 5 mg of NH3/liter of water was con- sidered, and at that dosage anhydrous ammonia is not known to contribute any contaminants that adversely affect the potability of drinking water.