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| | PHENYLARSONIC ACID Basic information |
| | PHENYLARSONIC ACID Chemical Properties |
| Melting point | 160 °C | | Boiling point | 66 °C(Press: 1 Torr) | | density | 1,76 g/cm3 | | solubility | 3.2% in water and 15.5% in ethanol. | | pka | pK2: 8.48(+1) (22°C) | | form | Powder | | color | white | | Specific Gravity | 1.76 | | Water Solubility | 31.6g/L(28 ºC) | | Merck | 14,1067 | | CAS DataBase Reference | 98-05-5(CAS DataBase Reference) | | EPA Substance Registry System | Benzenearsonic acid (98-05-5) |
| | PHENYLARSONIC ACID Usage And Synthesis |
| Chemical Properties | Benzenearsonic acid is a colorless, crystalline
powder. | | Chemical Properties | white to slightly yellow crystalline powder | | Uses | Reagent for tin. | | Uses | Arsonic acids (arsonic acid, phenylarsonic acid, p-hydroxyphenylarsonic acid,
arsanilic acid) react with the tetravalent metals of group IV of the periodic
system to give water-insoluble complexes of composition MA2 . The composition
of the precipitates is not exactly stoichiometric, and hence the precipitates are not
suitable for direct gravimetric analysis. Instead, the precipitates are transformed
by ignition to the corresponding metal oxides and weighed as such. The main
advantage of the application of these reagents is the possibility offered of the
selective determination of zirconium(IV), hafnium(IV) and titanium(IV) in the
presence of many other metals, such as zinc, manganese, nickel, cobalt, aluminium,
copper, calcium, magnesium and chromium. In practice they are utilized most
frequently for the determination of zirconium.
In strong mineral acidic media phenylarsonic acid forms water-insoluble precipitates
with zirconium and hafnium only. In highly concentrated acetic acid
solution the thorium phenylarsonate complex is also precipitated, which makes
possible the separation of thorium from rare earth metals.
The procedure gives satisfactory results in the presence of alkaline earth metals,
iron, aluminium, manganese, cobalt, nickel, copper, zinc and bismuth. | | Definition | ChEBI: Phenylarsonic acid is an organoarsonic acid and a member of arsonic acids. It is a conjugate acid of a phenylarsonate(1-). | | General Description | Colorless solid. Used as an analytical reagent for tin. | | Reactivity Profile | PHENYLARSONIC ACID emits poisonous fumes of arsenic when heated to decomposition. [EPA, 1998]. | | Health Hazard | PHENYLARSONIC ACID is a deadly poison. (Non-Specific -- Arsenic Compounds) Chronic exposure to arsenic compounds can cause dermatitis and digestive disorders. Renal damage may develop. | | Fire Hazard | PHENYLARSONIC ACID emits poisonous fumes of arsenic when heated to decomposition. | | Safety Profile | A deadly poison by ingestion andintravenous routes. When heated to decomposition it emits toxic fumes of As. | | Potential Exposure | This material is used as an analytical
reagent for tin. | | Shipping | UN3280 Organoarsenic compound, liquid, n.o.s.,
Hazard Class: 6.1; Labels: 6.1—Poisonous materials,
Technical Name Required. Potential Inhalation Hazard
(Special Provision 5). | | Purification Methods | Crystallise it from H2O (3mL/g) between 90o and 0o. Alternatively dissolve 600g of the acid in 500mL of boiling H2O, add 20g of Norite, filter hot, cool, filter off the crystals and dry them. On heating at ~154-160o it is converted to the anhydride. [Bullard & Dickery Org Synth Coll Vol II 494 1943, for the 4-nitro derivative see Ruddy & Starkey Org Synth Coll Vol III 665 1955, Beilstein 16 H 868, 16 I 448, 16 II 457, 16 III 1057, 16 IV 1183.] |
| | PHENYLARSONIC ACID Preparation Products And Raw materials |
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