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Tungsten																				Related Pages
Synonyms & Trade Names
			Tungsten metal, Wolfram
CAS No.
			7440-33-7
	RTECS No.
			YO7175000
	DOT ID & Guide

FormulaW
	Conversion
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELTWA 5 mg/m3 ST 10 mg/m3 [*Note: The REL also applies to other insoluble tungsten compounds (as W).]
					OSHA PEL none See Appendix G
	Measurement Methods
			**NIOSH** 7074 , 7300 , 7301;**OSHA** ID213
					
					See: NMAM or OSHA Methods
										
Physical Description
			Hard, brittle, steel-gray to tin-white solid.													
										
Molecular Weight183.9	
	Boiling Point10,701°F
	Melting Point6170°F
	SolubilityInsoluble
	Vapor Pressure0 mmHg (approx)
	Ionization PotentialNA											
Specific Gravity19.3	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Combustible in the form of finely divided powder; may ignite spontaneously.
Incompatibilities & Reactivities
			Bromine trifluoride, chlorine trifluoride, fluorine, iodine pentafluoride
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, respiratory system; diffuse pulmonary fibrosis; loss of appetite, nausea, cough; blood changes
Target Organs
			Eyes, skin, respiratory system, blood
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**No recommendation
							**Eyes:**No recommendation
							**Wash skin:**No recommendation
							**Remove:**No recommendation
							**Change:**No recommendation
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash
							**Breathing:**Fresh air
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH****Up to 50 mg/m3**: (APF = 10) Any air-purifying respirator with an N100, R100, or P100 filter (including N100, R100, and P100 filtering facepieces) except quarter-mask respirators. Click here for information on selection of N, R, or P filters.(APF = 10) Any supplied-air respirator(APF = 50) Any self-contained breathing apparatus with a full facepiece**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 = 10) Any air-purifying respirator with an N100, R100, or P100 filter (including N100, R100, and P100 filtering facepieces) except quarter-mask respirators. 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: 1404

			
							

			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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