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Potassium hydroxide																				Related Pages
Synonyms & Trade Names
			Caustic potash, Lye [Potassium hydroxide], Potassium hydrate
CAS No.
			1310-58-3
	RTECS No.
			TT2100000
	DOT ID & Guide
			1813 154(dry, solid)1814 154(solution)

FormulaKOH
	Conversion
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELC 2 mg/m3OSHA PEL none See Appendix G
	Measurement Methods
			**NIOSH** 7401
					
					See: NMAM or OSHA Methods
										
Physical Description
			Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets.
					[Note: May be used as an aqueous solution.]													
										
Molecular Weight56.1	
	Boiling Point2415°F
	Melting Point716°F
	Solubility(59°F): 107%
	Vapor Pressure(1317°F): 1 mmHg
	Ionization Potential?											
Specific Gravity2.04	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Solid; however, may react with H2O & other substancesand generate sufficient heat to ignite combustible materials.
Incompatibilities & Reactivities
			Acids, water, metals (when wet), halogenated hydrocarbons, maleic anhydride
					[Note: Heat is generated if KOH comes in contact with H2O & CO2 from the air.]
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, respiratory system; cough, sneezing; eye, skin burns; vomiting, diarrhea
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**Daily
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0357

			
							

			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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