298-07-7 Usage
Chemical Properties
clear colorless to light yellow liquid
Uses
Different sources of media describe the Uses of 298-07-7 differently. You can refer to the following data:
1. Additive to lubrication oils, corrosion inhibitor, and antioxidant.
Used as extractant in the hydrometallurgical separation
of cobalt and nickel. Metal extraction and
separation, intermediate for wetting agents and detergents
. Feedstock for chemical synthesis; extraction
fluid for metal salts; cation extracting agent.
2. Extraction of metals.Bis(2-ethylhexyl) phosphate is used as a lubricant additive, corrosion inhibitor and a metal extractant. It is involved in the solvent extraction of uranium salts and rare earth metals. Iron(II) ions are extracted after reduction of Iron(III) ions. Further, it is used as a plasticizer and as a solvent in the synthesis of plastic.
Production Methods
Produced by chlorinating bis(2-ethylhexyl) phosphonate
to give the phosphate diester chloride, followed by hydrolysis,
or by saponification of tris(2-ethylhexyl) phosphate
.
General Description
Odorless light yellow liquid. Floats on water.
Reactivity Profile
Organophosphates, such as Bis(2-ethylhexyl) phosphate, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides. Mildly corrosive to most metals; may form flammable hydrogen gas [USCG, 1999].
Health Hazard
Contact with liquid irritates eyes and may cause serious injury; consult an eye specialist. Also causes skin irritation on contact. Ingestion produces irritation similar to that caused by strong vinegar.
Fire Hazard
Special Hazards of Combustion Products: Irritating phosphorus oxides may be released.
Flammability and Explosibility
Nonflammable
Purification Methods
Contaminants of commercial samples include the monoester, polyphosphates, pyrophosphate, 2-ethylhexanol and metal impurities. Dissolve the acid in n-hexane to give an 0.8M solution. Wash this with an equal volume of M HNO3, then with saturated (NH4)2CO3 solution, with 3M HNO3, and twice with water [Petrow & Allen Anal Chem 33 1303 1961]. Similarly, the impure sodium salt, after scrubbing with pet ether, is acidified with HCl and the free organic acid is extracted into pet ether and purified as above [Peppard et al. J Inorg Nucl Chem 7 231 1958], or as described by Stewart & Crandall [J Am Chem Soc 73 1377 1951]. It can be purified via its copper salt [McDowell et al. J Inorg Nucl Chem 38 2127 1976]. [Beilstein 1 IV 1796.]
Check Digit Verification of cas no
The CAS Registry Mumber 298-07-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,9 and 8 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 298-07:
(5*2)+(4*9)+(3*8)+(2*0)+(1*7)=77
77 % 10 = 7
So 298-07-7 is a valid CAS Registry Number.
InChI:InChI=1/C8H19O4P/c1-3-5-6-8(4-2)7-12-13(9,10)11/h8H,3-7H2,1-2H3,(H2,9,10,11)/p-1
298-07-7Relevant articles and documents
Solvent-free microwave synthesis of trialkylphosphates
Meddour-Boukhobza, Laaldja,Elias, Abdelhamid,Didi, Mohamed A.
, p. 255 - 259 (2014/06/23)
Trialkylphosphates are synthesized from alcohols by reaction with reactive phosphorus oxychloride under microwave irradiations and classical heating. Effects of these irradiations on the nature of the products and on the yield are studied. The compounds were characterized by their spectroscopic data and elemental analysis. The obtained results show that the products of these reactions are essentially trialkylphosphates and alkylphosphoric acids. They always show as the nature of the formed products and the yields in trialkylphosphates are comparable to those obtained in the classical conditions of heating. The speed of the reaction was increased by a factor from 40 to 120.
Novel photolabile protecting group for phosphate compounds
Zhang, Youlai,Tanimoto, Hiroki,Nishiyama, Yasuhiro,Morimoto, Tsumoru,Kakiuchi, Kiyomi
scheme or table, p. 367 - 370 (2012/03/11)
A novel photolabile protecting group, thiochromone S,S-dioxide, containing the diazomethyl group for protection of phosphate derivatives is described. Deprotection of the successfully protected phosphate derivatives proceeded smoothly under photoirradiation using an ultrahigh-pressure mercury lamp to recover the corresponding phosphates quantitatively, and the photoproduct derived from the thiochromone derivative showed high fluorescence intensity. Georg Thieme Verlag Stuttgart · New York.
Determination of phosphoric acid mono- and diesters in municipal wastewater by solid-phase extraction and ion-pair liquid chromatography-tandem mass spectrometry
Quintana, Jose Benito,Rodil, Rosario,Reemtsma, Thorsten
, p. 1644 - 1650 (2008/02/05)
The first analytical method for the determination of 13 phosphoric acid mono- and diesters from aqueous samples is presented. The method consists of solid-phase extraction (SPE) and ion-pair liquid chromatographic separation with tri-n-butylamine coupled to electrospray ionization tandem mass spectrometry in the negative ion mode. Due to a lack of pure standards, only 3 of the 13 esters could be quantified. SPE recoveries ranged from 71 to 112% for di-n-butyl phosphate, diphenyl phosphate, and di-(2-ethylhexyl) phosphate (DEHP) with limits of quantification from 7 to 14 ng/L for 100-mL samples. At analyte concentrations ≥1 μg/L, aqueous samples can be analyzed by direct injection without extraction. In municipal wastewater, six diesters and one monoester were unambiguously identified by comparison with synthesized reference material. DEHP showed highest concentrations of 60 and 5 μg/L in raw and treated wastewater, respectively. The detection of monoethylhexyl phosphate was confirmed by LC-Q-TOF-MS analysis, and it was found at a concentration level comparable to DEHP. Laboratory degradation tests show that phosphoric acid diesters can be formed as intermediates in the microbial degradation of trialkyl phosphates that are being used as flame retardants and plasticizers.
