Pyrotartaric acid

  • Methylsuccinic acid
  • Methylbutanedioic acid
  • ,2-Propanedicarboxylic acid
  • 2-Methylbutane-1,4-dioic acid
Formula
C5H8O4
Structure
Description
White or yellowish crystals or beige powder.

Registry Numbers and Inventories.
CAS
498-21-5
EC (EINECS/ELINCS)
207-857-1
Beilstein/Gmelin
1722946
Beilstein Reference
4-02-00-01948
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H8O4
Formula mass
132.11
Melting point, °C
115 - 116
Boiling point, °C
237
Vapor pressure, mmHg
0.016 (25 C)
Density
1.4105 g/cm3
Solubility in water
Very soluble
pKa/pKb
4.27 (pKa)
Partition coefficient, pKow
-0.24
Heat of vaporization
52.1 kJ/mol
Heat of combustion
-2175 kJ/mol

Hazards and Protection.
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.
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.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, reducing agents, bases.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
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.

Health.
Exposure effects
   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.

First aid
 
   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.

Transport.