Description
Hydrogenated terphenyls are a complex mix-ture of partially hydrogenated terphenyl isomers. They areclear, oily, pale-yellow liquids with a faint odor. Molecularweight = 241.00; 298.00 (40% hydrogenated); Specificgravity (H2O:1l) = 1.00; Boiling point = 340℃ (40% hydro-genated); FreezingMelting point= 148℃ (40% hydroge-nated); V aporpressure= 13 Paat25℃;Flashpoint= 157℃ (cc); Autoignition temperature = 374℃.Insoluble in water.
Uses
Terphenyl, hydrogenated is a high-performance heat transfer oil. Its main components are a mixture of partially hydrogenated terphenyl isomers, obtained by partially hydrogenating a mixture of ortho-, meta-, and para-terphenyls in different proportions (saturation level of 39%). It possesses excellent thermal stability, oxidation resistance, and low vapor pressure properties, and is widely used in petrochemical, synthetic fiber, synthetic resin, pharmaceutical, and printing and dyeing industries. It is applied in high-temperature heat transfer and heating equipment systems, chemical fiber polymerization (polyester, nylon polymerization, dry spandex spinning), organosilicon monomer synthesis, trichlorosilane and polysilicon, pharmaceuticals, pesticides, dye intermediates, and other fine chemicals and biodiesel.
General Description
Clear, oily, pale-yellow liquid with a faint odor. A mixture of numerous compounds and isomers depending on the degree and conditions of hydrogenation The 40% hydrogenated mixture has bp: 340°C, density: 1.00 g cm-3, and is insoluble in water. Used as a plasticizer and as a heat-transfer medium. Can be absorbed through the skin and by ingestion.
Reactivity Profile
Terphenyl, hydrogenated are non-flammable (flash-point 157°C for 40% hydrogenated mixture), but combustible. Resist decomposition but break down to produce acrid smoke when heated sufficiently. Incompatible with strong oxidizing agents.
Potential Exposure
These materials are used as; high-tem-perature heat-transfer media and as p lasticizers.
First aid
If this chemical gets into the eyes, remove anycontact lenses at once andirrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek med-ical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled,remove from exposure,begin rescue breathing (using universal precautions, includ-ing resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medi-cal attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.
storage
Color Code- Green: Generalstorage may beused. Prior to working with this chemical you should betrained on its proper handling and storage. Store in tightlyclosed containers in a cool, well-ventilated area away fromoxidizers. W here possible, automatically pump liquid fromdrums or other storage containers to process containers.
Incompatibilities
Strong oxidizers. W hen heated, iritatingvapors will be released.
Short Term Exposure
Irritates eyes, skin, respiratory sys-tem. Potential acute hazards consist of damage to the lungsand damage to the skin and eyes from burns from the hotcoolant.
Long Term Exposure
Potential chronic hazards comprisedamage to liver, kidney, and blood-forming organs with thepossibility of induction of metabolic disorders andcancer.[53]
Personal Protective Methods
Wear protective gloves andclothing to prevent any reasonable probability of skin con-tact. Safety equipment suppliers/manufacturers can providerecommendationsonthe most protective glove/clothingmaterial for your operation. All protective clothing (suits,gloves, footwear, headgear) should be clean, available eachday, and put on before work. Contact lenses should not bewom when working with this chemical. Wear splash-proofchemical goggles and face shield unless full face-piecerespiratory protection is worn. Employees should washimmediately with soap when skin is wet or contaminated. .Provide emergency showers and eyewash.
Fire Extinguishing
This chemical is a combustible liquid.rritating vapors are produced in fire. Use dry chemical, car-bon dioxide, or foam extinguishers. Vapors are heavier thanair and will collect in low areas. V apors in confined areas mayexplode when exposed to fire. Containers may explode in fire.Storage containers and parts of containers may rocket greatdistances, in many directions. If material or contaminated run-off enters waterways, notify downstream users of potentiallycontaminated waters. Notify local health and fire officials andpollution control agencies. From a secure, explosion-prooflocation, use water spray to cool exposed containers. If coolingstreams are ineffective (venting sound increases in volume andpitch, tank discolors, or shows any signs of deforming), with-draw immediately to a secure position. Ifemployees areexpected to fight fires, they must be trained and equipped inOSHA 1910.156. The only respirators recommended for fire-fighting are self-contained breathing apparatuses that have fullface-pieces and are operated in a pressure-demand or otherpositive-pre ssure mode.
