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METHYLTETRAHYDROPHTHALIC ANHYDRIDE
ICSC: 1645
Peer-Review Status: 10.04.2008 Validated
Tetrahydromethyl-1,3-isobenzofuranedione
MTHPA
1,2,3,6-tetrahydromethylphthalic anhydride
1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl- 
CAS #: 26590-20-5 RTECS #: I3325000
EC #: 607-240-00-0
EINECS #: 247-830-1
    Formula: C9H10O3
Molecular mass: 166.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   AVOID ALL CONTACT!   
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
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking liquid in covered containers.   
EC Classification
Symbol: Xn; R: 41-42/43; S: (2)-22-24-26-37/39; Note: C 
UN Classification
 
GHS Classification
Signal: Danger
May cause allergic or asthmatic symptoms or breathing difficulties if inhaled
May cause allergic skin reaction 
cancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
   

IMPORTANT DATA
Physical State; Appearance
OILY LIQUID. 

Physical dangers
 

Chemical dangers
 

Occupational exposure limits
TLV not established. 

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

Inhalation risk
 

Effects of short-term exposure
 

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. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 124°C
Melting point: -29°C
Flash point: 350°C 
 

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
 

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