Phenyl ether biphenyl mixture

  • Diphenyl oxide-diphenyl mixture
  • Dowtherm a
  • Phenyl ether-biphenyl eutectic
Formula
C12H10O.C12H10
Structure
Description
Light to dark brown fragrant liquid.
Uses
Dowtherm a is used as a heat transfer agent in the liquid or vapor phase at temperatures below 380 deg c mainly in the manufacture of synthetic rubber, artificial fibers, plastics, and pigments.

Registry Numbers and Inventories.
CAS
8004-13-5
RTECS
DV1500000
RTECS class
Human Data; Primary Irritant
Beilstein/Gmelin
NA
Austrailia AICS
Listed

Properties.
Formula
C12H10O.C12H10
Formula mass
324.44
Melting point, °C
12.2
Boiling point, °C
257
Vapor pressure, mmHg
0.08
Vapor density (air=1)
11,2
Density
1.06 g/cm3 (20 C)
Solubility in water
Insoluble

Hazards and Protection.
Storage
Keep away from sources of ignition. 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. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation.
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 gloves to prevent skin exposure. Clothing: Wear appropriate 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. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong acids, strong bases, strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
123
Autoignition, °C
621
Upper exp. limit, %
6.2
Lower exp. limit, %
0.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Containers may explode when heated. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Moderate fire hazard, when exposed to heat or flame. Diphenyl oxide
Combustion products
Irritating gases generated when heated
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: TWA 1 ppm (7 mg/m3) OSHA PEL: TWA 1 ppm (7 mg/m3) IDLH 10 ppm
Exposure effects
Headache, fatigue, numbness, and aching limbs have occurred in workers. Peripheral and central nerve damage may occur.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. 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
DTH