1,1′-Biphenyl, mixt. with 1,1′-oxybis[benzene]

324.415

324.151428

616-827-0

DTXSID9073387

Colorless to straw-colored liquid or solid (below 54 degrees F) ... [Note: A mixture typically contains 75% phenyl ether & 25% biphenyl].

29093090

9.23000

6.83250

Dowtherm appears as light to dark brown fragrant liquid. May float or sink in water. Freezing point is 54°F. (USCG, 1999)

1.06 g/cm³ @ Temp: 25 °C

12.2 °C

257 °C

123 °C

n20/D 1.590

Insoluble in water.

(77°F): 0.08 mmHg

Class IIIB Combustible Liquid: Fl.P. at or above 200°F.

... Disagreeable aromatic odor.

CONVERSION FACTORS @ 25 °C & 760 MM HG: 1 PPM= APPROX 6.79 MG/CU M; 1 MG/L= APPROX 147.3 PPM|log octanol/water partition coefficient = 4.55 /2-Biphenyl phenyl ether/

Insoluble in water.

Ethers

DOWTHERM is incompatible with the following: Strong oxidizers (NIOSH, 2016).

1150 °F (USCG, 1999)

Class IIIB Combustible Liquid: Fl.P. at or above 200°F.

III

3.2

UN 3082 9/PG 3

2

R36/37/38

26-60-61

DV1500000

Xi: Irritant;N: Dangerous for the environment;

P261-P273-P305 + P351 + P338-P501

H315-H319-H335-H410

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Strong oxidizers.

Special Hazards of Combustion Products: Irritating gases generated when heated (USCG, 1999)

|Warning|H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P391, P403+P233, P405, and P501|Aggregated GHS information provided by 4 companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Skin: Wear appropriate personal protective clothing to prevent skin contact. Eyes: Wear appropriate eye protection to prevent eye contact. Wash skin: The worker should immediately wash the skin when it becomes contaminated. Remove: Work clothing that becomes wet or significantly contaminated should be removed and replaced. Change: No recommendation is made specifying the need for the worker to change clothing after the work shift. (NIOSH, 2016)|Wear appropriate personal protective clothing to prevent skin contact.|Wear appropriate eye protection to prevent eye contact.|Recommendations for respirator selection. Max concn for use: 10 ppm. Respirator Class(es): Any supplied-air respirator operated in a continuous flow mode. Eye protection needed. Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter. Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter. Any powered, air-purifying respirator with organic vapor cartridge(s) in combination with a dust and mist filter. Eye protection needed. Any self-contained breathing apparatus with a full facepiece. Any supplied-air respirator with a full facepiece.|Recommendations for respirator selection. Condition: Emergency or planned entry into unknown concn or IDLH conditions: Respirator Class(es): Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode. Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive-pressure mode.|Recommendations for respirator selection. Condition: Escape from suddenly occurring respiratory hazards: Respirator Class(es): Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter. Any appropriate escape-type, self-contained breathing apparatus.|(See protection codes)

MODERATE, WHEN EXPOSED TO HEAT OR FLAME... SPONTANEOUS HEATING: NO. /DIPHENYL OXIDE/

WATER, FOAM, CARBON DIOXIDE, DRY CHEMICAL. /DIPHENYL OXIDE/

SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.|The worker should immediately wash the skin when it becomes contaminated.|Work clothing that becomes wet or significantly contaminated should be removed and replaced.

Irritation to eyes and mucous membranes. /From table/|When concn of 3 or 4 ppm in air are reached, there is irritation of the eyes, nose, and throat.

Recommended Exposure Limit: 10 Hr Time-Weighted Avg: 1 ppm (7 mg/cu m).

USE OF DOWTHERM INVOLVES SERIOUS DIFFICULTIES BECAUSE, EVEN THOUGH IT IS HEATED & KEPT IN CLOSED SYSTEM, SMALL QUANTITIES OF LIQ OR VAPOR MAY ESCAPE FROM JOINTS OR GASKETS, THUS POLLUTING ATMOSPHERE.

Odor of hot material may cause discomfort. Mildly irritating to eyes and skin. (USCG, 1999)

Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical. Skin: If this chemical contacts the skin, promptly wash the contaminated skin with soap and water. If this chemical penetrates the clothing, promptly remove the clothing and wash the skin with soap and water. Get medical attention promptly. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. (NIOSH, 2016)|(See procedures)

When concn of 3 or 4 ppm in air are reached, there is irritation of the eyes, nose, and throat. In one instance a man received in the eyes a spray of fine droplets of Dowtherm under pressure. He felt no immediate discomfort, but within five minutes he began to feel stinging and burning of the eyes and also of the skin about his eyes; his discomfort was relieved immediately when the eyes and skin were washed with a bland oil. Slit lamp biomicroscopic examination shortly thereafter revealed no corneal injury.|SUMMARY TOXICITY STATEMENT /ACUTE/= MODERATE IRRITANT TO SKIN, EYES & MUCOUS MEMBRANE. MODERATE= MAY CAUSE REVERSIBLE OR IRREVERSIBLE CHANGES TO EXPOSED TISSUE, NOT PERMANENT INJURY OR DEATH; CAN CAUSE CONSIDERABLE DISCOMFORT.

biphenyl-diphenyl ether mixture

inhalation, skin and/or eye contact

irritation eyes, nose, skin; nausea

Eyes, skin, respiratory system

100% AS A HEAT TRANSFER MEDIUM (1972)

IT IS USED WIDELY IN LIQ PHASE OR IN VAPOR PHASE AS A HEAT-TRANSFER AGENT @ TEMP BELOW 750 °F.