Sodium tetraborate.decahydrate

Dissolve 1.9 g di-sodium tetraborate decahydrate in 100 ml water and adjust the pH to 10.5 with caustic soda solution. 

B. Standardisation against sodium tetraborate. The advantages of sodium tetraborate decahydrate (borax) are (i) it has a large relative molecular mass, 381.44 (that of anhydrous sodium carbonate is 106.00) (ii) it is easily and economically purified by recrystallisation (iii) heating to constant weight is not required (iv) it is practically non-hygroscopic and (v) a sharp end point can be obtained with methyl red at room temperatures, since this indicator is not affected by the very weak boric acid. 

Commercially, sodium tetraborate decahydrate or borax (Na CylOHjO) is usually employed, although sodium metaborate hydrate (NaB02 xH20) may be used. 

Sodium borate decahydrate sodium tetraborate decahydrate sodium biborate sodium pyroborate... 

Buffer sodium tetraborate decahydrate 0.05M (Na2B4O7.10H2O) in aqueous Na2(EDTA)4 x 10 4 M, 10 mL... 

Pentaborane Diborane Decaborane Sodium borate Boron trifluoride Calcium borate Boron tribromide Boron oxide Total dust Respirable fraction Sodium tetraborate Decahydrate... 

Borax sodium tetraborate decahydrate Na2B407 10H20... 

RDX is destroyed by placing the precipitate into a hot, aqueous solution of sodium tetraborate decahydrate with a small amount of... 

C. Alexander-Weber, and F. G. K. Baucke. Limited Stability of the pH Reference Material Sodium Tetraborate Decahydrate ( Borax ), Fresenius J. Anal. Chem. 1994,350, 119. 

Dissolve 7.624 g sodium tetraborate decahydrate (reagent grade) in 400 ml deionized water. Adjust pH to 9.7 with 1 N NaOH. Bring to 500 ml with water. Store up 3 months at 4°C. 

Disodium hydrogen phosphate, 0.025 mol kg-1 + potassium dihydrogen phosphate, 0.025 mol kg-1 Disodium hydrogen phosphate, 0.03043 mol kg-1 + potassium dihydrogen phosphate, 0.008695 mol kg-1 Sodium tetraborate decahydrate, 0.01 mol kg-1... 

A 5.00 g sample of borax (sodium tetraborate decahydrate, Na2B4O7-10H2O) was thoroughly heated to remove all the water of hydration. What mass of anhydrous sodium tetraborate remained ... 

Sodium tetraborate (01m). Dissolve 38-1 g sodium tetraborate decahydrate (borax), Na2B407.10H2O, in water and dilute to 1 litre. 

Sodium tetraborate decahydrate (borax) (Na2B407 10 H20) is a stomach poison used against all common household ants and cockroaches. Its oral LD50 in rats is 2660-5190 mg/kg. 

The sodium tetraborate decahydrate system is used almost... 

Four sodium tetraborates are important as boron minerals and/or large tonnage items of commerce. Borax, or sodium tetraborate decahydrate, is extracted from large open-pit mines in Tnrkey and the United States. Turkish beneficiated native borax, also referred to by the mineral name tincal, is used directly in glass making and other applications. Refined borax is used widely in consumer products and as... 

Commercial available as boric acid, sodium tetraborate decahydrate (borax), sodium pentaborate, boron trioxide, and sodium biborate. 

The principal source of compounds of boron is the complex borate minerals, including borax, sodium tetraborate decahydrate, Na2B407 IOH2O kemite, sodium tetraborate tetrahydrate, NaoB407 4H.20 (which gives borax when water is added) and colemanite, calcium hexaborate pentahydrate, CaoB. O, 51400. The main deposits of these minerals are in California. 

Borax decahydrate boric acid disodium salt E285 natrii tetraboras sodium biborate decahydrate sodium pyroborate decahydrate sodium tetraborate decahydrate. 

Bertoldi and colleagues (2004) performed analysis of BAs in grape juice by automatic pre-column derivatization with OPA solution (45 mg OPA, 200 pX 2-mercaptoethanol, 1 mL methanol, sodium tetraborate decahydrate 0.1 M pH 10.5 buffer solution added up to final volume of 10 mL). Chromatographic separation of derivatives (see Figure 4.13) was achieved on a C18 (4.6 x 150mm, 5 pan) column kept at 40 °C at flow rate lmL/min. Eluent A was 0.05 M sodium acetate buffer/tetrahydrofuran 96 4 (v/v) and eluent B was methanol. The gradient program is reported in Table 4.1. 

Sodium tetraborate decahydrate and mercury(II) oxide have also been recommended as primary standards. The reaction of an acid with the tetraborate is... 

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