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METHYLHEXAHYDROPHTHALIC ACID ANHYDRIDEICSC: 1644
MHHPA
Hexahydromethylphthalic acid anhydride
1,3-Isobenzofurandione, hexahydromethyl-
October 2006
CAS #: 25550-51-0
EC Number: 247-094-1

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.    NO open flames.    Use water spray, foam, powder, carbon dioxide.   

 AVOID ALL CONTACT!  
  SYMPTOMS PREVENTION FIRST AID
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 CLASSIFICATION & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Collect leaking and spilled liquid in covered containers as far as possible. 

According to UN GHS Criteria

cancer;health haz
DANGER
May cause allergic skin reaction
Causes serious eye irritation
Causes skin irritation 

Transportation
UN Classification
 

STORAGE
Separated from food and feedstuffs. Dry. 
PACKAGING
 
METHYLHEXAHYDROPHTHALIC ACID ANHYDRIDE ICSC: 1644
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: C9H12O3
Molecular mass: 168.2
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 


EXPOSURE & HEALTH EFFECTS

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

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

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

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


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.
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. 

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

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    See Also:
       Toxicological Abbreviations