Potassium triiodide

In biological materials, various nonspecific precipitants have been used in the gravimetric deterrnination of choline, including potassium triiodide, platinum chloride, gold chloride, and phosphotungstic acid (28). Choline may also be determined spectrophotometricaHy and by microbiological, enzymatic, and physiological assay methods. 

The drug is conveniently synthesized from prostaglandin I 201 methyl ester (40), which undergoes oxybromination in the presence of potassium triiodide to give 41. Treatment with DBN... 

L.18 A tablet of vitamin C was analyzed to determine whether it did in fact contain, as the manufacturer claimed, 1.0 g of the vitamin. One tablet was dissolved in water to form 100.00 mL of solution, and 10.0-mL of that solution was titrated with iodine (as potassium triiodide). It required 10.1 mL of 0.0521 M I3-(aq) to reach the stoichiometric point in the titration. Given that 1 mol L,- reacts with 1 mol vitamin C in the reaction, is the manufacturer s claim correct The molar mass of vitamin C is 176 g-mol-1. 

Hydrogen sulphide is a good reducing agent. It reduces (i) acidified potassium permanganate, (ii) acidified potassium dichromate, and (iii) potassium triiodide (iodine) solution ... 

POTASSIUM TRIIODIDE see PLW285 POTASSIUM TROCLOSENE see PLDOOO POTASSIUM, metal aUoys pN 1420) pOp see PKT250 POTASSIUM VANADIUM TRIOXIDE see PLK810 POTASSIUM ZINC CHROMATE see PLW500 POTASSIUM ZINC CHROMATE see CMK400 POTASSIUM ZINC CHROMATE FIYDROXIDE see PLW500... 

Bromine hydrogen bromide sodium bromide potassium bromide silver bromide. Iodine hydrogen iodide hydriodic acid potassium triiodide. 

For purification, the crystalline hexaatomic sulfur is dissolved in benzene (approx. 100 mg./l.) toluene is not suitable (see Properties). The benzene solution is extracted with a series of reagents, three or four extractions being made with each reagent except where otherwise indicated. (For 200 ml. of benzene solution, 50-ml. portions of reagent are used). The reagents are employed in the following order (1) water, (2) 10% aqueous potassium triiodide, until the benzene phase remains colored from iodine, (3) 10% aqueous potassium iodide, (4) water, (5) 5% aqueous lead acetate, twice, (6) water, (7) 5 % aqueous potassium hydroxide, once, (8) water. The purified solution is dried over magnesium sulfate and should be used immediately. The approximate concentration of Sg can be determined spectro-photometrically at 300 mju (e = 181 l./g.-atom) after suit-... 

KI3H20 potassium triiodide monohydrate 7790-42-3 25 00 3.5000 1 2296 Li2H205Se lithium selenate monohydrate 7790-71-8 25.00 2.5600 1 1... 

Potassium triiodide produces with hyoscyamine (or salts) small plates and prisms often in crosses and arrowheads (sensitivity 1 in 1000) (9). 

At temperatures above 40 K, NIs-ONHs loses ammonia to form the red-brown to black NIs-NHs. The ammonia adduct NIs-NHs precipitates when ammonia is passed through an aqueous solution of potassium triiodide. In an atmosphere with a high partial pressure of ammonia, it can be stored in the dark for a long time. The dry compound is extremely sensitive and explodes after the slightest mechanical stress, slight heating, or irradiation. 

Figure 4.63. Redox titration of potassium triiodide by thiosulfate with starch added as indicator to the reagent stream R (5 x 10 M sodium thiosulfate) using the manifold depicted in Fig. 4.62a and the conditions stipulated there. All samples (C = 0.25, 0.5, 1.0, 2.0, 4.0, 6.0, 8.0, and 10.0 mM KI3) were each injected in triplicate and monitored spectrophoto-metrically at 610 nm. The At values were read off at the Eq level.

Potassium triiodide solution (solution of iodine in potassium iodide) decolourized when a colourless solution of tetrathionate ions is formed ... 

If the iodine reagent is not available as a stock solution, prepare it by dissolving 1 g of iodine in a solution of 2 g of potassium iodide in 8 mL of water. The potassium iodide is added to increase the solubility of iodine in water by formation of potassium triiodide, KI3 (Eg. 25.22). 

C8H20I3KN4O8, Tetrakis(glycine) potassium triiodide, 46B, 491 C8H22CaCl2N206, Bis(DL-2-aminobutyric acid) calcium chloride dihydrate, 44B, 438... 

ClBH27CIN2O4, c-Caprolactam - 4-chlororesorcinol C18H28N4O6, l8-Crown-6 - malononitrile, 43B, 412 C18H42I4K2N6O6, N-Methylacetamide-potassium iodide-potassium triiodide complex, 30B, 257... 

---