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4-METHOXYPHENOLICSC: 1097
Hydroquinone monomethyl ether
Mequinol
p-Hydroxyanisole
October 2004
CAS #: 150-76-5
EC Number: 205-769-8

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Finely dispersed particles form explosive mixtures in air.  NO open flames.  Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use water spray, powder, alcohol-resistant foam, carbon dioxide.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS PREVENTION FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Separated from strong oxidants, strong bases, acid anhydrides and acid chlorides. 
PACKAGING
 
4-METHOXYPHENOL ICSC: 1097
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: C7H8O2 / OH(C6H4)OCH3
Molecular mass: 124.1
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  


EXPOSURE & HEALTH EFFECTS

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

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

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 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. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 mg/m3, as TWA 

ENVIRONMENT
 

NOTES
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 22-36-43; S: (2)-24/25-26-37/39-46 

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       Toxicological Abbreviations