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METHYLHEXAHYDROPHTHALIC ACID ANHYDRIDE
ICSC: 1644
Peer-Review Status: 11.10.2006 Validated
Hexahydromethylphthalic acid anhydride
1,3-Isobenzofurandione, hexahydromethyl-
MHHPA 
CAS #: 25550-51-0 EC #: 607-241-00-6
EINECS #: 247-094-1
    Formula: C9H12O3
Molecular mass: 168.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use water spray, foam, powder, carbon dioxide. 
EXPLOSION      
 
EXPOSURE   AVOID ALL CONTACT!   
Inhalation Cough. Wheezing.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Diarrhoea.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Collect leaking and spilled liquid in covered containers as far as possible.   
EC Classification
Note: C; Symbol: Xn; R: 41-42/43; S: (2)-22-24-26-37/39 
UN Classification
 
GHS Classification
Signal: Danger
May cause allergic skin reaction
Causes serious eye irritation
Causes skin irritation 
cancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Separated from food and feedstuffs. Dry. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
No data. 

Chemical dangers
Decomposes slowly on contact with water. This produces acid. Reacts with acids, alcohols, bases and oxidants. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying. 

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

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation may cause asthma. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 290°C
Melting point: -29°C
Density: 1.15 g/cm³
Solubility in water at 20°C: reaction
Vapour pressure, Pa at 20°C: 1
Relative density of the vapour/air-mixture at 20°C (air = 1): 5.81
Flash point: 145°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.
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. 

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