# NIOSH Pocket Guide to Chemical Hazards
4-Methoxyphenol | CAS 150-76-5
CH3OC6H4OH | RTECS SL7700000
Synonyms & Trade Names Hydroquinone monomethyl ether, p-Hydroxyanisole, Mequinol, p-Methoxyphenol, Monomethyl ether hydroquinone | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 5 mg/m3
OSHA PEL†: none
IDLH N.D. | Conversion
Physical Description Colorless to white, waxy solid with an odor of caramel & phenol.
MW: 124.2 | BP: 469°F | MLT: 135°F | Sol(77°F): 4%
VP: <0.01 mmHg | IP: 7.50 eV |  | Sp.Gr: 1.55
Fl.P(oc): 270°F | UEL: ? | LEL: ? |
Combustible Solid; under certain conditions, a dust cloud can probably explode if ignited by a spark or flame.
Incompatibilities & Reactivities Strong oxidizers, strong bases, acid chlorides, acid anhydrides
Measurement Methods None available
Personal Protection & Sanitation 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 flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat, upper respiratory system; eye, skin burns; central nervous system depression
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION