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4-METHOXYPHENOL
ICSC: 1097
Peer-Review Status: 25.10.2004 Validated
Hydroquinone monomethyl ether
Mequinol
p-Hydroxyanisole 
CAS #: 150-76-5 RTECS #: SL7700000
EC #: 604-044-00-7
EINECS #: 205-769-8
    Formula: C7H8O2 / OH(C6H4)OCH3
Molecular mass: 124.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  Use water spray, powder, alcohol-resistant foam, carbon dioxide. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.   
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation   Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness. Burning sensation. Pain.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations.   
EC Classification
Symbol: Xn; R: 22-36-43; S: (2)-24/25-26-37/39-46 
UN Classification
 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H2; F1; R0.  Separated from strong oxidants, strong bases, acid anhydrides and acid chlorides. 

IMPORTANT DATA
Physical State; Appearance
WHITE-TO-TAN SOLID IN VARIOUS FORMS WITH CHARACTERISTIC ODOUR. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Reacts with strong oxidants, strong bases, acid anhydrides and acid chlorides. The solution in water is a weak acid. 

Occupational exposure limits
TLV: 5mg/m³ as TWA; (ACGIH 2004). 

Routes of exposure
The substance can be absorbed into the body by ingestion. 

Inhalation risk
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is irritating to the eyes and skin. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the skin. This may result in depigmentation. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 243°C
Melting point: 57°C
Density: 1.6 g/cm³
Solubility in water, g/100ml at 25°C: 4
Relative vapour density (air = 1): 4.3
Flash point: 132°C o.c.
Auto-ignition temperature: 421°C
Octanol/water partition coefficient as log Pow: 1.58
Octanol/water partition coefficient as log Pow: 1.34 @23,32  
 

NOTES
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations