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HEXAHYDRO-4-METHYLPHTHALIC ANHYDRIDEICSC: 1376
Hexahydro-5-methyl-1,3-isobenzofurandione
4-Methylcyclohexane-1,2-dicarboxylic acid anhydride
Methylhexahydrophthalic anhydride
MHHPA
March 2001
CAS #: 19438-60-9
EC Number: 243-072-0

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.    NO open flames.    Use water spray, powder, foam, carbon dioxide.   

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Wheezing. Shortness of breath.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin Redness. Burning sensation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain. Blurred vision.  Wear safety goggles 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 Burning sensation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
Dry. Well closed. 
PACKAGING
 
HEXAHYDRO-4-METHYLPHTHALIC ANHYDRIDE ICSC: 1376
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS OILY LIQUID. 

Physical dangers
 

Chemical dangers
Reacts with water. This produces acid. 

Formula: C9H12O3 / CH3C6H9(CO)2O
Molecular mass: 168.2
Melting point: -29°C
Relative density (water = 1): 1.16
Solubility in water: reaction
Flash point: 350°C 


EXPOSURE & HEALTH EFFECTS

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

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

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; on spraying or dispersing, however, much faster. 

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.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. 

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