Anhydrous dibasic sodium phosphate

Select anhydrous dibasic sodium phosphate, or other chemical, for which the label indicates the insoluble matter present to be as high as 0.4%. Note The percent of insoluble matter must be high enough to provide enough matter to be collected and measured. 

Each Imitrex Nasal Spray contains 5 or 20 mg of sumatriptan in a 100-pL unit-dose aqueous buffered solution containing monobasic potassium phosphate, anhydrous dibasic sodium phosphate, sulfuric acid, sodium hydroxide,... 

Phosphate buffer Dissolve 0.725 g of monobasic sodium phosphate and 4.472 g of anhydrous dibasic sodium phosphate in 300 ml of water, dilute with water to 1000 ml, and mix. Dilute 250 ml of this solution with water to 1000 ml. If necessary, adjust the pH with phosphoric acid to 7.6. 

Copper Reagent Solution Dissolve 28 g of anhydrous dibasic sodium phosphate and 40 g of potassium sodium tartrate (KNaC4H406-4H20) in 700 mL of water. Add 100 mL of IN sodium hydroxide and 8 g of copper sulfate pentahy-drate, followed by 180 g of anhydrous sodium sulfate. Add 0.7134 g of potassium iodate, and dilute to 1 L. Allow to stand for several days, then filter the clear top part of the solution through a medium-porosity sintered-glass funnel. 

Copper Reagent Solution Dissolve 28 g of anhydrous dibasic sodium phosphate and 40 g of potassium sodium tartrate (KNaC4H4064H20) in 700 mL of water. Add 100... 

Peroxide Substrate Solution Dissolve 25.0 g of anhydrous dibasic sodium phosphate (Na2HP04), or 70.8 g of Na2H-P0412H20, in about 1500 mL of water, and adjust to pH 7.0 0.1 with 85% phosphoric acid. Cautiously add 100 mL of 30% hydrogen peroxide, dilute to 2000 mL in a graduate, and mix. Store in a clean amber bottle, loosely stoppered. The solution is stable for more than 1 week if kept at 5° in a full container. (With freshly prepared substrate, the blank will require about 16 mL of 0.250 N Sodium Thiosulfate. If the blank requires less than 14 mL, the substrate solution is unsuitable and should be prepared fresh again. The sample titration must be between 50% and 80% of that required for the blank.)... 

M Phosphate Buffer (pH 7.0) Dissolve 4.54 g of monobasic potassium phosphate in water, and dilute to 500 mL. Dissolve 4.73 g of anhydrous dibasic sodium phosphate in water, and dilute to 500 mL. Mix 38.0 mL of the monobasic potassium phosphate solution with 61.1 mL of the dibasic sodium phosphate solution. Adjust the pH of the mixture to 7.0 by the dropwise addition of the dibasic sodium phosphate solution, if necessary. 

Sodium Phosphate Solution (0.05 M) Transfer 7.1 g of anhydrous dibasic sodium phosphate into a 1000-mL volumetric flask, dissolve in about 500 mL of water, dilute to volume with water, and mix. Add 1 drop of toluene as a preservative. 

Phosphate-Cysteine-EDTA Buffer Solution Dissolve 7.1 g of anhydrous dibasic sodium phosphate in about 800 mL of water, and then dissolve in this solution 14.0 g of disodium EDTA dihydrate and 6.1 g of cysteine hydrochloride monohydrate. 

Somogyi s Copper Reagent Dissolve 14.0 g of anhydrous dibasic sodium phosphate and 20.0 g of potassium sodium tartrate tetrahydrate into 250 mL of water. Add 60.0 g of 1 M sodium hydroxide solution. Dissolve 4.0 g of cupric sulfate pentahydrate into 25 mL of water. Add this solution to the tartrate solution. Add 90.0 g of anhydrous sodium sulfate while stirring. Dilute the final solution to 500 mL. 

Mix 13 mL of the monobasic potassium phosphate solution with 87 mL of the anhydrous dibasic sodium phosphate solution. 

Anhydrous dibasic sodium phosphate [7558-79-4] Dibasic sodium phosphate dihydrate [10028-24-7] Dibasic sodium phosphate dodecahydrate [10039-32-4] Dibasic sodium phosphate heptahydrate [7782-85-6] Dibasic sodium phosphate hydrate [10140-65-5] Dibasic sodium phosphate monohydrate [118830-14-1]... 

Anhydrous dibasic sodium phosphate occurs as a white powder. The dihydrate occurs as white or almost white, odorless crystals. The heptahydrate occurs as colorless crystals or as a white granular or caked salt that effloresces in warm, dry air. The dodecahydrate occurs as strongly efflorescent, colorless or transparent crystals. 

One gram of anhydrous dibasic sodium phosphate represents approximately 14.1 mmol of sodium and 7.0 mmol of phosphate. 

Phosphate-buffered saline (PBS), pH 7.4 8 g sodium chloride (NaCl), 200 mg potassium chloride (KC1), 200 mg monobasic potassium phosphate (KH2P04), 1.15 g anhydrous dibasic sodium phosphate (Na2HP04), bring volume to 1 L with deionized glass-distilled water (dH20). 

Fleat 75% of the water to 70°C in a suitable vessel. Add the monobasic sodium phosphate monohydrate, anhydrous dibasic sodium phosphate, propylene glycol, and benzyl alcohol to the vessel with agitation, maintaining the temperature at 70°C. 

Dibasic sodium phosphate. See Sodium phosphate dibasic anhydrous Dibasic sodium phosphate dihydrate. See Sodium phosphate dibasic dihydrate Dibasic sodium phosphate dodecahydrate. See Sodium phosphate dibasic dodecahydrate Dibasic sodium phosphate heptahydrate. See Sodium phosphate dibasic heptahydrate Dibasic zinc stearate. See Zinc stearate... 

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