Summary Of Plant Observation Reports And Evaluations For Hydroquinone.
Five facilities that manufacture or use hydroquinone (123319) were evaluated. The companies made or used photographic and technical grades of the chemical. Hydroquinone was manufactured by two major processes, both of which were carried out in enclosed reactor vessels. Measures were taken to prevent leakage or escape of vapor and dust from these vessels. Most facilities had efficient engineering controls for recovery of hydroquinone and therefore exposure was minimized. Many of the controls were used because of the high cost of the chemical. All companies gave preplacement medical examinations to new employees. Periodic eye examinations were given by an ophthalmologist for employees exposed to quinone (106514) and hydroquinone in some facilities since eye injuries were a major concern. Copies of medical questionnaires, safety rules and guidelines, written procedures, and handling precautions were provided by each company for new employees. Monthly safety meetings were held for all employees to emphasize safety measures. Hard hats, safety shoes, and rubber gloves were used in the majority of the facilities. Respirators were used to protect against dust and vapor inhalation. Samples taken from the facilities revealed that the environmental concentrations for hydroquinone were below 2 milligrams per cubic meter, which was considered safe.
NIOSH-Author; Chemical-synthesis; Air-quality-monitoring; Safety-practices; Health-protection; Medical-monitoring; Exposure-levels; Industrial-chemicals; Control-methods;
NIOSH, U.S. Department of Health, Education, and Welfare, 240 pages