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METHYLTETRAHYDROPHTHALIC ANHYDRIDEICSC: 1645
MTHPA
Tetrahydromethyl-1,3-isobenzofuranedione
1,2,3,6-tetrahydromethylphthalic anhydride
1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-
April 2008
CAS #: 26590-20-5
EC Number: 247-830-1

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.    NO open flames.    In case of fire in the surroundings, use appropriate extinguishing media.   

 AVOID ALL CONTACT!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention if skin irritation occurs. 
Eyes Redness.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking liquid in covered containers. 

According to UN GHS Criteria

cancer;health haz
DANGER
May cause allergic or asthmatic symptoms or breathing difficulties if inhaled
May cause allergic skin reaction 

Transportation
UN Classification
 

STORAGE
 
PACKAGING
 
METHYLTETRAHYDROPHTHALIC ANHYDRIDE ICSC: 1645
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
OILY LIQUID. 

Physical dangers
 

Chemical dangers
 

Formula: C9H10O3
Molecular mass: 166.2
Boiling point: 124°C
Melting point: -29°C
Flash point: 350°C 


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
 

Inhalation risk
 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation may cause asthma. See Notes. The substance may have effects on the skin. This may result in contact urticaria. 


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
 

NOTES
The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 41-42/43; S: (2)-22-24-26-37/39; Note: C 

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    See Also:
       Toxicological Abbreviations