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Criteria for a recommended standard... occupational exposure to methylene chloride.

Authors
NIOSH
Source
NIOSH 1976 Mar; :1-176
NIOSHTIC No.
00184111
Abstract
NIOSH recommends in this document that worker exposure to methylene- chloride (75092) (MC), in the absence of a concurrent carbon- monoxide (630080) (CO) exposures above 9 parts per million (ppm), be limited to 75ppm determined as a time weighted average for up to a 10 hour workday, 40 hour workweek. In the presence of CO levels over 9ppm, the existing CO levels must be figured into the total exposure as the effects of these two toxic agents are additive. Recommendations were given for medical surveillance, labeling of hazardous materials, personal protective equipment and clothing, respirator selection, instruction of employees regarding hazards, safe work practices, rules for confined space entry, monitoring and record keeping requirements. MC has been widely used in industry for paint stripping, manufacture of photographic film, and in aerosol propellants, as a solvent in degreasing, in the diphasic treatment of metal surfaces, in the textile and plastic industries, as the carrier in rapid dry paints, and for extracting heat sensitive edible fats and essential oils. MC has been allowed as a food additive in spice oleoresins and in roasted and instant decaffeinated coffee. Effects resulting from the inhalation of MC vapors include decreased visual performance, auditory vigilance and psychomotor tasks, irregular, severe leg and arm pains, hot flashes, vertigo, stupor, poor night vision, anorexia, precordial pain, rapid pulse, shortness of breath, fatigue, drowsiness, pains in the head, tingling in hands and feet, irritation of the eyes, lung, and respiratory tract, and increased alveolar CO at the end of the work day.
Keywords
NIOSH-Criteria-Document; Food-processing-industry; Textiles-industry; Cleaning-compounds; Organic-solvents; Photography; Painters; Construction-workers; Chlorinated-hydrocarbons; Toxic-gases
CAS No.
75-09-2; 630-08-0
Publication Date
19760301
Document Type
Numbered Publication; Criteria Document
Fiscal Year
1976
NTIS Accession No.
PB81-227027
NTIS Price
A10
Identifying No.
(NIOSH) 76-138
Source Name
National Institute for Occupational Safety and Health
State
OH
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