2-(Acetyloxy)propanoic acid, (+/-)

  • Lactic acid, acetate
  • a-Acetoxypropionic acid
  • 2-Acetoxypropionic acid
  • O-Acetyllactic acid
  • 2-Acetoxypropanoic acid
  • NSC 402126
Formula
C5H8O4
Structure
Description
Clear, colorless, viscous liquid.

Registry Numbers and Inventories.
CAS
3853-80-3
36/37/38
Beilstein/Gmelin
1722938
Beilstein Reference
4-03-00-00638

Properties.
Formula
C5H8O4
Formula mass
132.12
Melting point, °C
-49
Boiling point, °C
226
Vapor pressure, mmHg
0.03 (25 C)
Critical temperature
412
Critical pressure
38.75
Density
1.1758 g/cm3 (20 C)
Solubility in water
110 g/L (25 C)
Refractive index
1.4240 (20<sup>o</sup>C)
pKa/pKb
2.74 (pKa)
Partition coefficient, pKow
0.16
Heat of vaporization
51.00 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store in a cool dry place.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Respirators
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator.
Small spills/leaks
Absorb on sand or vermiculite and place in closed containers for disposal. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
95
Fire fighting
Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects
Vapor or mist is irritating to the eyes, mucous membranes, and upper respiratory tract. May be harmful by inhalation, ingestion, or skin absorption.
   Skin
Causes irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.