Hexahydro-5-methyl-1,3-isobenzofurandione
4-Methylcyclohexane-1,2-dicarboxylic acid anhydride
Methylhexahydrophthalic anhydride
MHHPA
C9H12O3 / CH3C6H9(CO)2O
Molecular mass: 168.2
ICSC # 1376
CAS # 19438-60-9
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.
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NO open flames.
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Powder, water spray, foam, carbon dioxide.
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Explosion
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Exposure
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PREVENT GENERATION OF MISTS!
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•Inhalation
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Cough.
Sore throat.
Wheezing.
Shortness of breath.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Half-upright position.
Refer for medical attention.
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•Skin
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Redness.
Burning sensation.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
Pain.
Blurred vision.
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Safety goggles,
or 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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Burning sensation.
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Rinse mouth.
Do NOT induce vomiting.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking liquid in sealable containers.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
(Extra personal protection: P2 filter respirator for harmful particles.)
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Dry.
Well closed.
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Note: C
Xn symbol
R: 41-42/43
S: 2-22-24-26-37/39
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Important Data
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Physical State; Appearance:
OILY
COLOURLESS LIQUID
Physical Dangers:
Chemical Dangers:
Reacts
with
water
to produce acid
.
Occupational Exposure Limits:
TLV not established.
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol.
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 Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
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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Melting point: -29°C
Relative density (water = 1): 1.16
Solubility in water:
reaction
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Flash point: 350°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.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance.
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ADDITIONAL INFORMATION
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ICSC: 1376
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HEXAHYDRO-4-METHYLPHTHALIC 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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