Hydrogen Chloride

CAS RN: 7647-01-0

Cleanup Methods

Accidental release measures. Personal precautions, protective equipment and emergency procedures: Wear respiratory protection. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas.; Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains.; Methods and materials for containment and cleaning up: Clean up promptly by sweeping or vacuum.
If hydrogen chloride gas is leaked ... 1. Ventilate area of leak to disperse gas. 2. Stop flow of gas. If source of leak is a cylinder and the leak cannot be stopped in place, remove the leaking cylinder to a safe place in the open air, and repair the leak or allow the cylinder to empty. If soln of hydrogen chloride is spilled ... 1. Collect or confine spilled material in the most convenient and safe manner. 2. If possible, reclaim the spilled material. If this is not possible; 3. Dilute and/or neutralize and dispose of in a secured sanitary landfill. /Hydrogen chloride gas/
Spills in Water: Sodium bicarbonate is recommended as an in situ neutralizing agent. /Hydrochloric acid/
During scrubbing (an air pollution control method), water is used for removing hydrochloric acid.
Environmental considerations -- land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Dike surface flow using soil, sand bags, foamed polyurethan or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Neutralize with agricultural lime (CaO), crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3). Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3). Air spill: Apply water spray or mist to knock down vapors. Vapor knockdown water is corrosive or toxic and should be diked for containment. /Hydrochloric acid; Hydrogen chloride, anhydrous; Hydrogen chloride, refrigerated liquid/
The following absorbent materials have been tested and recommended for vapor suppression and/or containment of 26% and 35% hydrochloric acid solutions: a mixture of (75%) anionic polyacrylamide (R1779) and (25%) nonionic polyacrylamide (Versicol W25), individually use the anionic polyacrylamide or nonionic polyacrylamide, and Cellosize WP3H (hydroxyethyl cellulose). /Hydrochloric acid/
Approach release from upwind. Stop or control the leak, if this can be done without undue risk. Use water fog or spray to knock down and absorb vapors. Releases may require isolation or evacuation. Control runoff and isolate discharged material for proper disposal. /Hydrogen chloride, anhydrous hydrogen chloride, refrigerated liquid/
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