Ethylenemalonic acid

  • 1,1-Cyclopropanedicarboxylic acid
  • Cyclopropane-1,1-dicarboxylic acid
  • 1-Carboxycyclopropanecarboxylic acid
Formula
C5H6O4
Structure
Description
White crystalline powder.

Registry Numbers and Inventories.
CAS
598-10-7
EC (EINECS/ELINCS)
209-917-2
S 26 36/37/39 45
UN (DOT)
3261
Beilstein/Gmelin
1864823
Beilstein Reference
3-09-00-03795

Properties.
Formula
C5H6O4
Formula mass
130.10
Melting point, °C
134-138
Boiling point, °C
371
Vapor pressure, mmHg
2E-6 (25 C)
Solubility in water
Very soluble
pKa/pKb
1.82 (pKa)
Partition coefficient, pKow
-0.80
Heat of vaporization
67.9 kJ/mol
Heat of combustion
-2023 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
Protection
Skin: Wear appropriate protective 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
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
193
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use foam, dry chemical, or carbon dioxide.

Health.
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. Chronic exposure may cause lung damage.
   Ingestion
Causes gastrointestinal tract burns.
   Inhalation
Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. May cause burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.
   Skin
Causes skin burns.
   Eyes
Causes eye burns. May result in corneal injury.

First aid
 
   Ingestion
Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   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.

Transport.
UN number
3261
Response guide