Disulfuric acid

HjCr.O, dichromic acid H2S2O7 disulfuric acid... [Pg.221]

HMn04 permanganic acid H2S2OS disulfurous acid... [Pg.221]

Like sulfurous acid , disulfurous acid is unknown either in the free state or in solution. However, as indicated in the preceding section, its salts, are readily obtained from concentrated solutions of hydrogen sulfite 2HS03 S2O52- + H2O. Unlike disulfates... [Pg.720]

It has a cyclic structure and may be regarded as a substituted diamide of disulfuric acid, H2S2O7 (Fig. 15.49b). [Pg.741]

Both sets of names are used in the literature. Free imidodisulfuric acid HN(S03H)2 (which is isoelectronic with disulfuric acid H2S2O7, p. 705) and free nitridotrisulfuric acid N(S03H)3 are unstable, but their salts are well characterized and have been extensively studied. [Pg.743]

Pyro-phosphorsaure, /. pyrophosphoric acid, -saure, /. pyro acid, -schleimsaure, /. pjto-mucic acid, furoic acid, -schwefelsaure, /. pyrosulfuric acid, disulfuric acid (H2S2O7). [Pg.351]

Disulfuric acid, Nitric acid See Nitric acid Alcohols, Disulfuric acid... [Pg.342]

Rastogi, R. P. et al., Amer. Inst. Aero. Astronaut. J., 1966, 4, 1083-1085 Ignition delays were determined for contact of various aliphatic alcohols with mixtures of disulfuric acid (d, 1.9) and red finning nitric acid (d, 1.5). With ethanol, a minimum of 30 wt% of disulfuric acid was required for ignition. [Pg.1571]

Procedure Cholinesterase activity was measured according to the modified biochemical methods developed for crude preparations (Gorunef ah, 1978), using Ellman reagent 5,5"-dithio-bis(p-nitrobenzoic acid) or its red analogue 2,2-dithio-bis-(p-phenyleneazo)-bis-(l-oxy-8-chlorine-3,6) -disulfur acid in the form of sodium salt, which interact with thiocholine salt (Roshchina 2001). Water extracts of vegetative microspores of horsetail (Equisetum arvense) or Hippeastrum hybridum microspores (150 mg of microspores in 30 ml for 1 h) were used. [Pg.156]

Disulfuric acid (also known as pyrosulfuric acid or oleum) also undergoes dissociation,... [Pg.348]

The catalytic oxidation of S02 produces S03, which reacts with water to produce sulfuric acid, and it dissolves in sulfuric acid to produce disulfuric acid or oleum, H2S207. Solid S03 exists as the trimer (S03)3 but there are different crystalline forms known. [Pg.530]

When S02 is added to a solution containing a sulfite, the S2052- ion is produced so the solution contains a salt of disulfurous acid (pyrosulfurous) acid. In aqueous solutions, these salts decompose when an acid is added. [Pg.540]

Today, sulfuric acid is produced by a method known as the contact process in which S02 is oxidized to S03, which then reacts with water to give the acid. Oxidation of S02 requires a suitable catalyst such as spongy platinum or sodium vanadate. In many cases, S03 is dissolved in 98% sulfuric acid to produce disulfuric acid oleum], which can be shipped, diluted, and still give 100% sulfuric acid. The concentration of S03 varies from 10 to 70% in commercial oleum. [Pg.543]

Disulfur difluoride, 22 829 Disulfuric acid, 23 765 Ditallowalkylamines, melting point,... [Pg.284]

Drum dryers potatoes, cereals, buttermilk, skim milk, dextrins, yeasts, instant oat meal, polyacylamides, sodium benzoate, propionates, acetates, phosphates, chelates, aluminum oxide, m-disulfuric acid, barium sulfate, calcium acetate-arsenate-carbonate-hydrate-phosphate, caustic, ferrous sulfate, glue, lead arsenate, sodium benzene sulfonate, and sodium chloride... [Pg.245]

The increase in acidity on addition of S03 to sulfuric acid is substantial, and an //0 value of —14.5 is reached with 50mol% S03. The main component up to this S03 concentration is pyrosulfuric (or disulfuric) acid H2S207. Upon heating or in the... [Pg.47]

Disulfuric acid (also known as pyrosulfuric acid), H2S2O7, which is the major constituent of fuming sulfuric acid , is formed from sulfur trioxide and sulfuric acid ... [Pg.639]

Sulfurous acid, H2S03, and disulfurous acid, H2S2O5, are examples of sulfur oxoacids that do not exist in the free state, although numerous salts derived from them containing the HSOJ, SO3-, HS2OJ, and S2O - anions are stable... [Pg.639]

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