Dibenzofuran

  • Diphenylene oxide
Formula
C12H8O
Structure
Description
Colorless white crystalline solid.
Uses
Component of heat-transfer oils (together with biphenyl), carrier for dyeing and printing textiles (combined with methylnaphthalenes), intermediate for production of dyes, antioxidants in plastics, and plastics.

Registry Numbers and Inventories.
CAS
132-64-9
EC (EINECS/ELINCS)
205-071-3
S 22 24/25
RTECS
HP4430000
RTECS class
Mutagen
Beilstein/Gmelin
121100
Beilstein Reference
5-17-02-00234
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C12H8O
Formula mass
168.20
Melting point, °C
79 - 82
Boiling point, °C
285
Vapor pressure, mmHg
0.004 (30 C)
Vapor density (air=1)
5.8
Odor Threshold Odor threshold 0.7752 mg/m3
Critical temperature
565
Critical pressure
40.0
Density
0.966 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.6079 (99 C)
Partition coefficient, pKow
4.12
Heat of fusion
17.64 kJ/mol
Heat of vaporization
80.5 kJ/mol
Heat of combustion
-5836 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Keep container tightly closed.
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 a chemical apron.
Respirators
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Disposal code
3
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
148
Upper exp. limit, %
6.4
Lower exp. limit, %
0.8
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
This material is probably combustible.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. Get medical aid.
   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. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
USCG CHRIS Code
DZF
 
HS Code
2932 99 95