Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Dihydro-2H-pyran-2,6(3H)-dione(108-55-4)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

Product Identification

Product Name
Dihydro-2H-pyran-2,6(3H)-dione
Synonyms
2H-Pyran-2,6(3H)-dione, dihydro-
Glutaric acid anhydride
Pentanedioic acid anhydride
Pentanedioic anhydride
Pyroglutaric acid
CAS
108-55-4
Formula
C5H6O3
Molecular Weight
114.1
EINECS
203-593-6
RTECS
MA3850000
RTECS Class
Other
Beilstein/Gmelin
110051
Beilstein Reference
5-17-11-00009
EC Class
harmful, irritant

Physical and Chemical Properties

Appearance
White powder.
Solubility in water
Very soluble
Melting Point
52 - 55
Boiling Point
287
Vapor Pressure
0.003 (25 C)
Density
1.411 g/cm3
Partition Coefficient
-.92
Heat Of Vaporization
52.6
Heat Of Combustion
-2207 kJ/mol

First Aid Measures

Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Ingestion
May cause central nervous system depression. May cause gastrointestinal tract damage. May be harmful if swallowed.
Inhalation
Causes respiratory tract irritation.
Skin
Causes skin irritation. If absorbed, may cause symptoms similar to those for ingestion. May be harmful if absorbed through the skin.
Eyes
Causes eye irritation.
EC Risk Phrase
R 21/22 37/38 41
EC Safety Phrase
S 26 36/37/39

Exposure Controls/Personal Protection

Personal Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Poison Class
4

Fire Fighting Measures

Flash Point
120
Autoignition
320
Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Do NOT use water directly on fire. Use foam, dry chemical, or carbon dioxide.
Upper exp. limit
13.1
Lower exp. limit
2

Accidental Release Measures

Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions.

Stability and Reactivity

Disposal Code
4
Stability
May decompose on exposure to moist air or water.
Incompatibilities
Strong oxidizing agents, acids, bases, alcohols, amines.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.

Transport Information

HS Code
2917 19 90
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