2,3-Dihydro-1,4-benzodioxin

  • Pyrocatechol ethylene ether
  • 1,2-(Ethylenedioxy)benzene
  • Ethylene o-phenylene dioxide
Formula
C8H8O2
Structure
Description
Clear, colorless liquid.

Registry Numbers and Inventories.
CAS
493-09-4
EC (EINECS/ELINCS)
207-775-6
S 23 24/25
RTECS
DF4728000
RTECS class
Drug
Beilstein/Gmelin
120846
Beilstein Reference
5-19-01-00439
New Zealand
Listed

Properties.
Formula
C8H8O2
Formula mass
136.15
Boiling point, °C
103
Vapor pressure, mmHg
0.04 (25 C)
Density
1.1731 g/cm3 (20 C)
Solubility in water
Slightly soluble
Refractive index
1.5485 (20 C)
Partition coefficient, pKow
1.88
Heat of vaporization
50.5 kJ/mol
Heat of combustion
-4039 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
Handling
Wash thoroughly after handling. Wash hands before eating. Use with adequate ventilation. Avoid contact with heat, sparks and flame. Do not get on skin or in eyes. Do not ingest or inhale.
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 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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents and acids
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
69
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. To extinguish fire, use water fog, dry chemical, carbon dioxide, or regular foam.

Health.
Exposure effects
   Ingestion
Ingestion of large amounts may cause gastrointestinal irritation. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. 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 if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2932 99 95