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m-Cresol																				Related Pages
Synonyms & Trade Names
			3-Cresol, meta-Cresol, m-Cresylic acid, 1-Hydroxy-3-methylbenzene, 3-Hydroxytoluene, 3-Methyl phenol
CAS No.
			108-39-4
	RTECS No.
			GO6125000
	DOT ID & Guide
			2076 153

FormulaCH3C6H4OH
	Conversion
			1 ppm = 4.43 mg/m3
	IDLH
			250 ppmSee: cresol

Exposure Limits
			NIOSH RELTWA 2.3 ppm (10 mg/m3)
					OSHA PEL TWA 5 ppm (22 mg/m3) [skin]
	Measurement Methods
			**NIOSH** 2546;**OSHA** 32
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless to yellowish liquid with a sweet, tarry odor.
					[Note: A solid below 54°F.]													
										
Molecular Weight108.2	
	Boiling Point397°F
	Freezing Point54°F
	Solubility2%
	Vapor Pressure(77°F): 0.14 mmHg
	Ionization Potential8.98 eV											
Specific Gravity1.03	
	Flash Point187°F
	Upper Explosive Limit?
	Lower Explosive Limit(300°F): 1.1%
Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
Incompatibilities & Reactivities
			Strong oxidizers, acids
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, mucous membrane; central nervous system effects: confusion, depression, resp failure; dyspnea (breathing difficulty), irreg rapid resp, weak pulse; eye, skin burns; dermatitis; lung, liver, kidney, pancreas damage
Target Organs
			Eyes, skin, respiratory system, central nervous system, liver, kidneys, pancreas, cardiovascular 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:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH****Up to 23 ppm**: (APF = 10) Any air-purifying half-mask respirator with organic vapor cartridge(s) in combination with an N95, R95, or P95 filter. 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 57.5 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode(APF = 25) Any powered, air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.**Up to 115 ppm**: (APF = 50) Any air-purifying full-facepiece respirator equipped with organic vapor cartridge(s) in combination with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter*(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode*(APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**Up to 250 ppm**: (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 (gas mask) with a chin-style, front- or back-mounted organic vapor 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: 0646

			
							

			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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