Fatal Exposure to Methylene Chloride Among U.S. Bathtub Refinishers — CDC

CDC -  In 2010, the Michigan Fatality Assessment and Control Evaluation program conducted an investigation into the death of a bathtub refinisher who used a methylene chloride–based paint stripping product marketed for use in aircraft maintenance. The program identified two earlier, similar deaths in Michigan. Program staff members notified CDC's National Institute for Occupational Safety and Health (NIOSH), which in turn notified the Occupational Safety and Health Administration (OSHA). In addition to the three deaths, OSHA identified 10 other bathtub refinisher fatalities associated with methylene chloride stripping agents that had been investigated in nine states during 2000–2011. Each death occurred in a residential bathroom with inadequate ventilation. Protective equipment, including a respirator, either was not used or was inadequate to protect against methylene chloride vapor, which has been recognized as potentially fatal to furniture strippers and factory workers (1,2) but has not been reported previously as a cause of death among bathtub refinishers. Worker safety agencies, public health agencies, methylene chloride–based stripper manufacturers, and trade organizations should communicate the extreme hazards of using methylene chloride–based stripping products in bathtub refinishing to employers, workers, and consumers. Employers should strongly consider alternative methods of bathtub stripping and always ensure worker safety protections that reduce the risk for health hazards to acceptable levels. Employers choosing to use methylene chloride–based stripping products must comply with OSHA's standard to limit methylene chloride exposures to safe levels.

The Michigan program is one of nine state Fatality Assessment and Control Evaluation programs funded by NIOSH to identify work-related injury deaths, conduct investigations to identify contributory factors, and develop recommendations for preventing deaths in similar situations. The findings of these investigations and subsequent recommendations are summarized in narrative reports broadly disseminated to employer and worker groups and posted at the NIOSH Fatality Assessment and Control Evaluation website.*

OSHA Investigation - OSHA and OSHA-approved State Occupational Safety and Health Plans† conduct investigations of worker deaths and enforce compliance with worker safety and health regulations. A review of the Integrated Management Information System (IMIS), a database for federal and state OSHA investigations, identified 12 methylene chloride–related deaths associated with professional bathtub refinishing operations during 2000–2011. One of the three deaths identified by the Michigan program was not in IMIS because the decedent was self-employed and therefore outside OSHA's enforcement jurisdiction. The ages of the 13 decedents ranged from 23 to 57 years (median = 39 years) (Table). Twelve were male.

Ten different products were associated with the 13 deaths. Six of the products were marketed for use in the aircraft industry, the rest for use on wood, metal, glass, and masonry. None of the product labels mentioned bathtub refinishing. The percentage of methylene chloride in the products ranged from 60% to 100%.

Toxicology tests from specimens collected at autopsy indicated methylene chloride blood levels ranging from 18 to 223 mg/L

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