(Acetyloxy)acetic acid

  • Acetylglycolic acid
  • (Acetyloxy)acetic acid
  • a-Acetoxyacetic acid
  • 2-Hydroxyacetic acid acetate
  • Glycolic acid, acetate
Formula
C4H6O4
Structure

Registry Numbers and Inventories.
CAS
13831-30-6
EC (EINECS/ELINCS)
237-541-9
26 27 28 36/37/39 45
UN (DOT)
3261

Properties.
Formula
C4H6O4
Formula mass
118.09
Melting point, °C
67 - 69
Boiling point, °C
261
Vapor pressure, mmHg
0.0034 (25 C)
Critical temperature
409
Critical pressure
43.4
Density
1.274 g/cm3 (20 C)
Solubility in water
144 g/L
pKa/pKb
2.69 (pKa)
Partition coefficient, pKow
-0.19
Heat of vaporization
54.94 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. Faceshield (8-inch minimum).
Respirators
Wear appropriate government approved respirator.
Small spills/leaks
Cover with dry lime or soda ash, pick up, keep in a closed container, and hold for waste disposal. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents, Strong bases.
Decomposition
Oxides of carbon.

Fire.
Flash Point,°C
103
Fire fighting
Extinguish with 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
Harmful if swallowed, inhaled, or absorbed through skin. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. Inhalation may result in spasm, inflammation and edema of the larynx and bronchi, chemical pneumonitis, and pulmonary edema. Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract, eyes, and skin.

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.
UN number
3261
Response guide
Hazard class
8
Packing Group
II