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Molybdenum powder dust

Airborne molybdenum metal or insoluble-compound powder and dust encountered in occupational handling or processing.

Airborne form

dust

The form describes what is suspended in air at the point of exposure. A material can produce more than one form, such as dust during handling and fume during heating.

Health effects

eye irritationnose and throat irritationanorexiadiarrheaweight losslistlessnessliver injury concernkidney injury concerncombustible-dust hazard

Evidence

A NIOSH health-hazard evaluation of a powdered-metal operation recorded complaints involving large amounts of powdered metal dust, including molybdenum, and eye and breathing irritation; the evaluation found that measured molybdenum concentrations were below the environmental criteria during the survey.

Source: pdf ↗ · saved source
page 1 · Summary; Findings and Conclusions · 1
The requestors health concerns included 'large amounts of powdered metal dust; molybdenum; powdered metal binder; continually filling air ... eye irritation and irritations to breathing'. Samples obtained during both surveys showed concentrations less than 5 percent of the environmental criteria for molybdenum.

The current NIOSH Pocket Guide describes molybdenum metal as a dark gray or black powder, classifies dust or powder as combustible, and reports animal eye, nose, and throat irritation with liver and kidney damage.

Source: html ↗ · saved source
Physical Description; Incompatibilities and Reactivities; Exposure Routes; Symptoms · 1
Physical Description Dark gray or black powder with a metallic luster. Combustible Solid in form of dust or powder. Exposure Routes inhalation, ingestion, skin and/or eye contact. Symptoms In Animals: irritation eyes, nose, throat ... liver, kidney damage.

The NIOSH Pocket Guide describes molybdenum as a dark gray or black powder, identifies inhalation, ingestion, skin, and eye contact routes, and reports eye, nose, and throat irritation plus animal anorexia, diarrhea, weight loss, listlessness, and liver and kidney damage; it also classifies the dust or powder as combustible.

Source: html ↗ · saved source
Physical hazard, symptoms, and target organs · 1
Physical Description: Dark gray or black powder with a metallic luster. Combustible Solid in form of dust or powder. Exposure Routes: inhalation, ingestion, skin and/or eye contact. Symptoms: In Animals: irritation eyes, nose, throat; anorexia, diarrhea, weight loss; listlessness; liver, kidney damage.

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