78-42-2 Usage
Chemical Properties
Tris(2-ethylhexyl) phosphate, a clear, viscous liquid, is used as a component of vinyl stabilizers, grease additives, and flame-proofing compositions; however, it is used primarily as a plasticizer for vinyl plastic and synthetic rubber compounds.
Tris(2-ethylhexyl) phosphate has been employed as a specialty flameretardant plasticizer for vinyl compositions where low temperature flexibility is critical, eg, in military tarpaulins. It can be included in blends with general purpose plasticizers such as phthalate esters to improve low temperature flexibility.
Uses
Different sources of media describe the Uses of 78-42-2 differently. You can refer to the following data:
1. Tris(2-ethylhexyl) Phosphate is used as a phosphorous flame retardant. Used as a plasticizer in the preparation of a new potentiometric membrane sensor.
2. Solvent, antifoaming agent, plasticizer.
General Description
Clear colorless to pale yellow liquid with a slight sharp odor. Insoluble in water; Soluble in alcohol, acetone, and ether. Combustible.
Reactivity Profile
Tris(2-ethylhexyl) phosphate is incompatible with oxidizing materials. Tris(2-ethylhexyl) phosphate may soften or deteriorate certain plastics and elastomers. Tris(2-ethylhexyl) phosphate is incompatible with cellulose acetate and cellulose acetate butyrate.
Hazard
Toxic by ingestion and inhalation.
Flammability and Explosibility
Notclassified
Purification Methods
TEHP, in an equal volume of diethyl ether, is shaken with aqueous 5% HCl, and the organic phase is filtered to remove traces of pyridine (used as a solvent during manufacture) as its hydrochloride. This layer is shaken with aqueous Na2CO3, then water, and the ether is distilled off at room temperature. The ester is then filtered, dried for 12hours at 100o/15mm, and again filtered, then shaken intermittently for 2days with activated alumina (100g/L). It is decanted through a fine sintered-glass disc (with exclusion of moisture), and distilled under vacuum. [French & Muggleton J Chem Soc 5064 1957.] *Benzene can be used as a solvent (to give 0.4M solution) instead of ether. IR (): 1702, 1701, 481 and 478cm -1 [Bellamy & Becker J Chem Soc 475 1952]. The uranyl nitrate salt is purified by partial crystallisation from hexane [Siddall & Dukes J Am Chem Soc 81 790 1959, Siddall J Am Chem Soc 81 4176 1959]. [Beilstein 1 IV 1786.]
Check Digit Verification of cas no
The CAS Registry Mumber 78-42-2 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 8 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 78-42:
(4*7)+(3*8)+(2*4)+(1*2)=62
62 % 10 = 2
So 78-42-2 is a valid CAS Registry Number.
InChI:InChI=1/C36H75O4P/c1-13-25-28-31(16-4)34(19-7,20-8)38-41(37,39-35(21-9,22-10)32(17-5)29-26-14-2)40-36(23-11,24-12)33(18-6)30-27-15-3/h31-33H,13-30H2,1-12H3
78-42-2Relevant articles and documents
Preparation method of tri-iso-octyl phosphate
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Paragraph 0012; 0016; 0017; 0018; 0019; 0020; 0021-0061, (2017/02/24)
The invention provides a preparation method of tri-iso-octyl phosphate, and in particular relates to a method of utilizing phosphorus oxychloride and isooctyl alcohol under negative pressure and simultaneously carrying out ultrasonic-assisted chlorine hydride gas removal to prepare tri-iso-octyl phosphate. The invention utilizes the method of ultrasonic-assisted chlorine hydride gas removal to prepare tri-iso-octyl phosphate, under the action of ultrasonic wave, violent impact occur between liquid particles, thus being conducive to accelerated reaction. Also, after ultrasonic wave acts on the reaction feed liquid, a lot of small bubbles can be produced, tensile stress can appear locally in the liquid so as to form negative pressure, the pressure reduction brings about supersaturation of gas originally dissolved in the feed liquid, so that the gas escapes from the liquid to form bubbles, and then by means of vacuum pumping and under an ultrasonic assisted condition, the escaped hydrogen chloride gas can break away directly, thus greatly reducing the generation of the byproduct iso-octane chloride. The method not only improves the reaction yield, but also reduces environmental pollution, and saves the production cost.
ETUDE PAR SPECTROMETRIE RMN DU MECANISME DE L'ACTION DU 2-ETHYLHEXANOL SUR LE PENTOXYDE DE PHOSPHORE
Elias, A.,Azzouz, A.,Rodehueser, L.
, p. 91 - 100 (2007/10/02)
The reaction of phosphorus pentaxide with 2-ethylhexanol has been studied in the absence of solvent.The analysis of raw and purified reaction products has been carried out using 31P NMR.This study allowed us to describe the different reaction steps and the evolution of the reagents, intermediates, and reaction products with time.The examination of the time and temperature dependence has shown the importance of kinetic effects and has given insight into the mechanism of the action of the alcohol on the P-O bonds of the phosphoric anhydride.The results suggest that only the progresive cleaving of these bonds leads to the products obtained under these conditions. Key words: Di(2-ethylhexyl)phosphate; phosphorus pentoxide; 2-ethylhexanol; synthesis; mechanism; NMR.