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Arsenic (inorganic compounds, as As)																				Related Pages
Synonyms & Trade Names
			Arsenia, Arsenic metal
					[Note: OSHA considers "Inorganic Arsenic" to mean copper acetoarsenite and all inorganic compounds containing arsenic except ARSINE.]
CAS No.
			7440-38-2 (metal)
	RTECS No.
			CG0525000 (metal)
	DOT ID & Guide
			1558 152(metal)1562 152(dust)

FormulaAs (metal)
	Conversion
	IDLH
			Ca [5 mg/m3 (as As)]See: 7440382

Exposure Limits
			NIOSH RELCa C 0.002 mg/m3 [15-minute] See Appendix A
					OSHA PEL [1910.1018] TWA 0.010 mg/m3
	Measurement Methods
			**NIOSH** 7300 , 7301 , 7303 , 7900 , 9102;**OSHA** ID105
					
					See: NMAM or OSHA Methods
										
Physical Description
			Metal: Silver-gray or tin-white, brittle, odorless solid.													
										
Molecular Weight74.9	
	Boiling PointSublimes
	Melting Point1135°F (Sublimes)
	SolubilityInsoluble
	Vapor Pressure0 mmHg (approx)
	Ionization PotentialNA											
Specific Gravity5.73 (metal)	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Metal: Noncombustible Solid in bulk form, but a slight explosion hazard in the form of dust when exposed to flame.
Incompatibilities & Reactivities
			Strong oxidizers, bromine azide
					[Note: Hydrogen gas can react with inorganic arsenic to form the highly toxic gas arsine.]
Exposure Routes
			inhalation, skin absorption, skin and/or eye contact, ingestion
Symptoms
			Ulceration of nasal septum, dermatitis, gastrointestinal disturbances, peripheral neuropathy, resp irritation, hyperpigmentation of skin, [potential occupational carcinogen]
Target Organs
			Liver, kidneys, skin, lungs, lymphatic system
Cancer Site[lung & lymphatic cancer]										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated/Daily
							**Remove:**When wet or contaminated
							**Change:**Daily
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			(See Appendix E)**NIOSH****At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:** (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 (gas mask) with a chin-style, front- or back-mounted acid gas canister having 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: 0013
					  MEDICAL TESTS: 0017

			
							

			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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