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Acetylsalicylic acid																				Related Pages
Synonyms & Trade Names
			2-Acetoxybenzoic acid, o-Acetoxybenzoic acid, Aspirin
CAS No.
			50-78-2
	RTECS No.
			VO0700000
	DOT ID & Guide

FormulaCH3COOC6H4COOH
	Conversion
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELTWA 5 mg/m3OSHA PEL none See Appendix G
	Measurement Methods
			**NIOSH** 0500
					
					See: NMAM or OSHA Methods
										
Physical Description
			Odorless, colorless to white, crystal-line powder.
					[aspirin] [Note: Develops the vinegar-like odor of acetic acid on contact with moisture.]													
										
Molecular Weight180.2	
	Boiling Point284°F (Decomposes)
	Melting Point275°F
	Solubility(77°F): 0.3%
	Vapor Pressure0 mmHg (approx)
	Ionization PotentialNA											
Specific Gravity1.35	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	
	Minimum Explosive Concentration40 g/m3
Combustible Powder; explosion hazard if dispersed in air.
Incompatibilities & Reactivities
			Solutions of alkali hydroxides or carbonates, strong oxidizers, moisture
					[Note: Slowly hydrolyzes in moist air to salicyclic & acetic acids.]
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, upper respiratory system; increased blood clotting time; nausea, vomiting; liver, kidney injury
Target Organs
			Eyes, skin, respiratory system, blood, liver, kidneys
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**No recommendation
							**Change:**Daily
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0822

			
							

			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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Chemical Names, Synonyms and Trade Names
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CAS Numbers
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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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