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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 14544647 - Employee Inadvertently Generates Chlorine Gas

Accident: 14544647 -- Report ID: 0317700 -- Event Date: 06/01/1994
InspectionOpen DateSICEstablishment Name
1762380206/30/19942621International Paper
Employee #1 was assigned to neutralize a 5 percent aqueous solution of sodium hypochlorite with sodium thiosulfate. The procedure required first mixing the powdered sodium thiosulfate with water and then adding the resulting mixture to the sodium hypochlorite. Employee #1 skipped the water mixing step to save time and dumped the powdered sodium thiosulfate directly in the sodium hypochlorite. Chlorine gas was generated from the reaction, and Employee #1 was hospitalized. Employee #1 performs normal chemical mixing and had been provided information and training on associated chemicals. The chemical mixture is used as a biocide and not for paper bleaching.
Keywords: sodium hypochlorite, work rules, chlorine, chemical reaction, chemical vapor, process safety, toxic fumes
Employee # Inspection Age Sex Degree Nature Occupation
1 17623802 Hospitalized injury Asphyxia Occupation not reported

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