Phenols sulfonic acids

Phenol sulfonic acid (determination of nitrogen as nitrate water analysis for nitrate) dissolve 25 g pure, white phenol in 150 mL of pure concentrated H2SO4, add 75 mL of fuming H2SO4 (15% SO3), stir well and heat for two hours at 100°C. 

The second stage of this process consists of nitration of the phenol sulfonic acids with coned nitric acid. The overall process is represented dia-gramatically as ... 

Bromine can replace sulfonic acid groups on aromatic rings that also contain activating groups. Phenolic sulfonic acids, for example, are polybrominated (24). 

T. R. E. Kressman (69) performed similar tests at a homogeneous gel membrane of the phenol sulfonic acid type and KC1 solutions. In the range of a+= 10-3-3 and += 0.1 the slope was found to be approx, equal to the theoretical slope, which corresponds with a potential change of 58 mV at a change in activity with a factor of 10. U. Schindewolf and K. F. Bonhoeffer (141), who likewise investigated a phenol sulfonic acid membrane, found results analogous to those of Kressman. 

R. ScHLOGL and U. Schodel 146) have supplied another proof for the usability of the Nemst-Planck flux equations combined with the M.S.T. model, also for the case that an electric current flows through an ion-selective membrane. They determined the concentration profiles of the mobile ions for the case of a cation selective membrane on the basis of phenol sulfonic acid and NaCl solutions, under application of an electric current. 

Similar results were obtained by G. Manecke (90) with cation exchange membranes on a phenol sulfonic acid basis and styrene sulfonic acid basis. 

The replacement of the sulfonic acid group by halogen is governed largely oy groups already present on the nucleus. When there is no other group, as in benzenesulfonic acid, the replacement does not take place. The reaction occurs readily with phenolic sulfonic acids and is... 

Curing Catalysts. If resol is heated to a high temperature, it can be cured without catalyst but in order to make curing it at an ambient temperature (room temperature), an acidic catalyst must be used. Both organic acid and inorganic acid catalysts can be used. Inorganic acids used include hydrochloric acid, sulfuric acid, and phosphoric acid, whUe benzene sulfonic acid, toluene sulfonic acid, and phenol sulfonic acid, are organic acids used. 

PSA. [Hatt CSietiL Ud.] Phenol sulfonic acid electrolyte ftv tin plating catalyst fta resins. 

It is advisable, particularly for introduction of several nitro groups, to start from phenol-sulfonic acids and to exchange their sulfo groups for nitro groups (see page 546). It is also possible to replace the chlorine of chloronitrobenzenes by a hydroxyl group by means of boiling aqueous alkali. 

Methyl phenate—Anisol—CjHt,OCH>—isacolorless, thin liquid, boils at 162° (305°.6 P.) without decomposition. Sulfuric acid dissolves it, with formation of methyl-phenol sulfonic acid. 

Ortho-phenol sulfonic acid—Sozolic acid—Aseptol—C H4,OH, SO3H—which is prepared by the action of cold concentrated H3SO4 upon phenol. It is a reddish, syrupy liquid, soluble in H3O in all proportions, has a faint and not disagreeable odor. It pre-... 

A composite actuator was constructed using a copolymer of PPy and poly(methoxyaniline) formed in p-phenol sulfonic acid (PPS). Higher actuation deformations were seen at low pH. Pure PPy(PPS) initially showed mixed cation and anion actuation when tested in 1 M NaCl, but the cathodic expansion was removed by the inclusion of 30% poly(methoxyani-line) and the extent of electrochemical creep was also diminished [144]. The inclusion of poly(2-methoxyaniline-5-sulfonate) (PMAS) into PPy(DBS) films improved the cathodic expansion of the films. The presence of the PMAS also led to some anodic film expansion in some electrolytes (e.g. KCl), but exclusively enhanced cation expansion in other electrolytes (TBAPF4) [145]. 

Hydroxyphenyl sulfonic acid. See p-Phenol sulfonic acid... 

Phenol sulfonic acid liquid Sulfocarbolic acid Classification Aromatic organic compd. 

Phenol sulfonic acid liquid. See Phenolsulfonic acid Phenol-4-sulfonic acid sol n. See p-Phenol sulfonic acid Phenol, 2,2 -thiobis (4-chk>ro-). See2,2-Thiobis (4-chlorophenol)... 

Hydroxybenzenecarboxylic acid. See 4-Hydroxybenzoic acid Hyidroxybenzenesulfonic acid. See Phenolsulfonic acid 4-Hydroxybenzenesulfonic acid p-Hydroxybenzenesulfonic acid. See p-Phenol sulfonic acid... 

Hydroxyphenyl sulfone. See 4,4 -Dihydroxydiphenyl sulfone 4-Hydroxyphenyl sulfonic acid. See p-Phenol sulfonic acid Hydroxyphosphonic acid Formula OP(OH)2CHOHCOOH... 

Manuf./Distrib. Aldrich http //www.sigma-aldrich.com] Alfa Chem http //www.aifachem.homepage.com] Kira Spectrum Quality Prods. http //www.spectrumchemicai. com Trade Name Synonyms Eltesol PA 65 t[Muntsman Surf. Sciences http //WWW. huntsman. com/surface sciences] Eltesol PSA 65 f[Muntsman Surf. Sciences http //WWW. huntsman. com/surface sciences] PSA [Muntsman http //www.huntsman.com]] Surfonic PSA [Muntsman http //WWW. huntsman, com] p-Phenol sulfonic acid CAS 98-67-9 EINECS/ELINCS 202-691-6 UN 1803 (DOT)... 

Phenol sulfonic acid liquid. See Phenolsulfonic acid... 

Paraldehyde Perchloromethyl mercaptan p-Phenetidine p-Phenol sulfonic acid Phenoxyacetic acid Phenyidiethanolamine Phenylethylethanolamine 1-Phenyl-3-methyl-5-pyrazolone p-Phenylphenol p-Phenylphenol... 

Basic violet 10 , 1-Nitroso-2-naphthol reagent, cobalt separation from chioride media Bis (2,4,4,-trimethylpentyl) phosphinic acid reagent, cobalt separation from sulfate media Bis (2,4,4,-trimethylpentyl) phosphinic acid reagent, cold permanent hair waves/strai g hteners Ammonium thioglycolate reagent, colored aluminum anodizing Maleic acid p-Phenol sulfonic acid 5-Sulfosalicylic acid reagent, colorimetric iron 5-Sulfosalicylic acid 5-Sulfosalicylic acid dihydrate... 

Phenolsulfonic acid p-Phenol sulfonic acid C6H6O4S V3AI Aluminum phenolsulfonate C6H6O4S H3N Ammonium phenolsulfonate CeHeO n Zinc diacrylate CeHeOe Aconitic acid Cellulose fibers CeHeO 2Na Disodium citrate CeHeS Thiophenol C6H7ASNO3 Na Sodium arsanilate CeH7BHg03 Phenylmercuric borate C6H7CIN2... 

Resoles can be cured by strong organic and inorganic acids. Organic sidfonic acids, such as toluene sulfonic acid and phenol sulfonic acid, arc preferred reactants because of their excellent compalibilily with the polymer structure. There are extensive studies of these reactions and they are well understood (equation 37) [118,119]. 

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