Hexahydromethylphthalic acid anhydride
1,3-Isobenzofurandione, hexahydromethyl-
MHHPA
C9H12O3
Molecular mass: 168.2
ICSC # 1644
CAS # 25550-51-0
EC # 607-241-00-6
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Water spray, foam, powder, carbon dioxide.
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Explosion
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Exposure
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AVOID ALL CONTACT!
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•Inhalation
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Cough.
Wheezing.
Symptoms may be delayed (see Notes).
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Face shield
and
eye protection in combination with breathing protection.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Diarrhoea.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection: complete protective clothing including self-contained breathing apparatus.
Collect leaking liquid in covered containers.
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Separated from
food and feedstuffs.
Dry.
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Note: C
Xn symbol
R: 41-42/43
S: 2-22-24-26-37/39
Signal: Danger
Health haz
May cause allergic or asthmatic symptoms or breathing difficulties if inhaled
May cause allergic skin reaction
Causes serious eye irritation
Causes skin irritation
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
Physical Dangers:
Chemical Dangers:
The substance decomposes slowly on contact with water producing acids. Reacts with acids, alcohols, bases and oxidants.
Occupational Exposure Limits:
TLV not established.
MAK not established.
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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
and
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 exposure may cause asthma.
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Physical
Properties
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Boiling point: 290°C
Melting point: -29°C
Density: 1.15 g/cm3
Solubility in water: at 20°C reaction
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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
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Environmental
Data
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N O T E S
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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.
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ADDITIONAL INFORMATION
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ICSC: 1644
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METHYLHEXAHYDROPHTHALIC ACID ANHYDRIDE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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