Phenyl ether biphenyl mixture
- Diphenyl oxide-diphenyl mixture
- Dowtherm a
- Phenyl ether-biphenyl eutectic
Light to dark brown fragrant liquid.
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.
Human Data; Primary Irritant
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
1.06 g/cm3 (20 C)
Solubility in water
Hazards and Protection.
Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
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.
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.
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.
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.
Stable at room temperature in closed containers under normal storage and handling conditions.
Strong acids, strong bases, strong oxidizing agents.
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Upper exp. limit, %
Lower exp. limit, %
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.
Moderate fire hazard, when exposed to heat or flame. Diphenyl oxide
Irritating gases generated when heated
NIOSH REL: TWA 1 ppm (7 mg/m3) OSHA PEL: TWA 1 ppm (7 mg/m3) IDLH 10 ppm
Headache, fatigue, numbness, and aching limbs have occurred in workers. Peripheral and central nerve damage may occur.
Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
Causes respiratory tract irritation.
Causes skin irritation.
Causes eye irritation.
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.
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
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.
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
USCG CHRIS Code