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NIOSH

METHYLTETRAHYDROPHTHALIC ANHYDRIDE

ICSC: 1645

Tetrahydromethyl-1,3-isobenzofuranedione
MTHPA
1,2,3,6-tetrahydromethylphthalic anhydride
1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-
C9H10O3
Molecular mass: 166.2
ICSC # 1645 		CAS # 26590-20-5
RTECS # I3325000
EC # 607-240-00-0
April 10, 2008 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible.
NO open flames.
In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION


EXPOSURE
AVOID ALL CONTACT!

•INHALATION Cough.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest.
•SKIN Redness.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention if skin irritation occurs
•EYES Redness.
Face shield and eye protection in combination with breathing protection.
First rinse with plenty of water (remove contact lenses if easily possible).
•INGESTION
Do not eat, drink, or smoke during work.
Rinse mouth.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Chemical protection suit including self-contained breathing apparatus. Collect leaking liquid in covered containers.


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
ICSC: 1645 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

METHYLTETRAHYDROPHTHALIC ANHYDRIDE

ICSC: 1645

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
OILY LIQUID

PHYSICAL DANGERS:


CHEMICAL DANGERS:


OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:


EFFECTS OF SHORT-TERM EXPOSURE:


EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged inhalation exposure may cause asthma see notes. The substance may have effects on the skin , resulting in contact urticaria.

PHYSICAL
PROPERTIES

Boiling point: 124°C
Melting point: -29°C
Flash point: 350°C

ENVIRONMENTAL
DATA


N O T E S

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.

ADDITIONAL INFORMATION



ICSC: 1645 METHYLTETRAHYDROPHTHALIC ANHYDRIDE
(C) IPCS, CEC, 1994
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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