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Cobalt metal dust and fume (as Co)																				Related Pages
Synonyms & Trade Names
			Cobalt metal dust, Cobalt metal fume
CAS No.
			7440-48-4
	RTECS No.
			GF8750000
	DOT ID & Guide

FormulaCo
	Conversion
	IDLH
			20 mg/m3 (as Co)See: 7440484

Exposure Limits
			NIOSH RELTWA 0.05 mg/m3OSHA PEL TWA 0.1 mg/m3See Appendix G
	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.													
										
Molecular Weight58.9	
	Boiling Point5612°F
	Melting Point2719°F
	SolubilityInsoluble
	Vapor Pressure0 mmHg (approx)
	Ionization PotentialNA											
Specific Gravity8.92	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
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
					  ICSC CARD: 0782
					  MEDICAL TESTS: 0055

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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