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Cobalt metal dust and fume (as Co)

Synonyms & Trade Names
Cobalt metal dust, Cobalt metal fume
CAS No.
7440-48-4
RTECS No.
GF8750000
DOT ID & Guide
Formula
Co
Conversion
IDLH
20 mg/m3 (as Co)
See: 7440484
Exposure Limits
NIOSH REL
: TWA 0.05 mg/m3
OSHA PEL
†: TWA 0.1 mg/m3
Measurement Methods

NIOSH 7027 , 7300 , 7301 , 7303 , 9102;
OSHA ID121 , ID125G , ID213
See: NMAM or OSHA Methods
Physical Description
Odorless, silver-gray to black solid.
MW:
58.9
BP:
5612°F		 MLT: 2719°F
Sol:
Insoluble
VP:
0 mmHg (approx)
IP:
NA
Sp.Gr:
8.92
Fl.P:
NA
UEL:
NA
LEL:
NA
Noncombustible Solid in bulk form, but finely divided dust will burn at high temperatures.
Incompatibilities & Reactivities
Strong oxidizers, ammonium nitrate
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
Cough, dyspnea (breathing difficulty), wheezing, decreased pulmonary function; weight loss; dermatitis; diffuse nodular fibrosis; resp hypersensitivity, asthma
Target Organs
Skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: No recommendation
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

NIOSH

Up to 0.25 mg/m3:
(APF = 5) Any quarter-mask respirator.
Click here for information on selection of N, R, or P filters.

Up to 0.5 mg/m3:
(APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The following filters may also be used: N99, R99, P99, N100, R100, P100.
Click here for information on selection of N, R, or P filters.*
(APF = 10) Any supplied-air respirator*

Up to 1.25 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*
(APF = 25) Any powered, air-purifying respirator with a high-efficiency particulate filter.*

Up to 2.5 mg/m3:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 20 mg/m3:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0782   See MEDICAL TESTS: 0055
 

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