Product Identification
【Product Name】2-Methylsuccinic acid
【Synonyms】Methylsuccinic acid ；甲基丁二酸
【CAS】498-21-5
【Formula】C5H8O4
【Molecular Weight】132.11000000000001
【EINECS】207-857-1
【Beilstein/Gmelin】1722946
【Beilstein Reference】4-02-00-01948

Physical and Chemical Properties
【Appearance】White or yellowish crystals or beige powder.
【Solubility in water】Very soluble
【Melting Point】115-116℃
【Boiling Point】237℃
【Vapor Pressure】0.016 (25℃)
【Density】1.4105 g/cm3
【pKa/pKb】4.27 (pKa)
【Partition Coefficient】-.24
【Heat Of Vaporization】52.1 kJ/mol
【Heat Of Combustion】-2175 kJ/mol

First Aid Measures
【Ingestion】If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid.
【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 if irritation develops or persists. Flush skin with plenty of soap and water.
【Eyes】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. Store in a tightly closed container.
【Handling】Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.

Hazards Identification
【Ingestion】May cause irritation of the digestive tract. Low hazard for usual industrial handling.
【Inhalation】Causes respiratory tract irritation.
【Skin】Causes skin irritation.
【Eyes】Causes eye irritation.

Exposure Controls/Personal Protection
【Personal Protection】Eyes: Wear appropriate protective eyeglasses or chemical safety ggles 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.

Fire Fighting Measures
【Flash Point】111℃
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Accidental Release Measures
【Small spills/leaks】Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity
【Incompatibilities】Oxidizing agents, reducing agents, bases.
【Stability】Stable under normal temperatures and pressures.
【Decomposition】Carbon monoxide, carbon dioxide.