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OCR for page 27
27 Name: CARBON DIOXIDE CAS No.: 124-38-9 Chemical Formula: CO2 Description: NAS/CWIC 010-82 Formula Weight: 48.1 A colorless, odorless, nonflammable gas, weighing 1.977 g/liter at 0C and at a pressure of 760 mm of mercury. Solubility in water: one volume/volume of water and its solutions are acid. Use: Used primarily after lime softening as a stabilization agent to convert carbonates to bicarbonates. Purity Requirements: A maximum dosage of 100 mg of carbon dioxide/liter of water was considered, and at that dosage commercially available 99.5% purity carbon dioxide is not known to contribute any contaminants that adversely affect the potability of drinking water.