Citric acid monohydrate

Citric acid monohydrate [5949-29-1] has a molecular weight of 210.14 and crystallizes from cold aqueous solutions. When gendy heated, the crystals lose thek water of hydration at 70—75°C and melt in the range of 135—152°C. Rapid heating causes dehydration at 100°C to form crystals that melt sharply at 153°C. Citric acid monohydrate is available in limited commercial quantities since most appHcations now call for the anhydrous form. 

Dipping solution Dissolve 100 mg of 8-anilinonaphthalene-l-sulfonic acid ammonium salt in a mixture of 40 ml caustic soda solution (c = 0.1 mol/1) and 57 ml of an aqueous solution containing 21 g citric acid monohydrate and 8 g sodium hydroxide per hter. 

QHj07 77-92-9) see Choline dihydrogen citrate citric acid monohydrate (C H Oj, 5949-29-1) see Mosapride citrate (-l-)-citronellal... 

Dipping solution in Dissolve 5 g citric acid monohydrate in 50 ml water and make to 100 ml with actone [2],... 

Silver nitrate Citric acid monohydrate Acetone... 

Citrated blood is diluted 1 10 with enzyme buffer solution, and preservative is added (H19). The buffer is prepared by dissolving 0.2 g of Clarase (Fisher Scientific Co., New York) in 100 ml citrate buffer (5 g potassium citrate monohydrate and 1 g citric acid monohydrate in 1000 ml distilled water, pH 5.6). The solution is incubated for 3 days at 37°. After incubation, it is autoclaved 15 minutes to stop enzymatic action and coagulate proteins. It is filtered, and 1.0, 1.5, and 2.0 ml of the supernatant is added to individual flasks and assayed. Control flasks are included to estimate pantothenic acid contamination of the enzyme. 

Citric acid monohydrate (8) 1,2, 3-Propanetricarboxylic acid, 2-hydroxy-, monohydrate (9) (5949-29-1)... 

Solution Preparation. Solutions were prepared from reagent grade citric acid monohydrate, sodium citrate dihydrate, NaHS03, Na2S04, NaCl, and standardized NaOH solution. Hydroquinone (0.1 wt %) was added to inhibit oxidation of solutions with NaHS03. 

Citric acid monohydrate, crystallized [H0C.C00H(CH2C00H)2.H20]... 

Citric acid extractant - dissolve 10 g citric acid monohydrate in water, make up to 500 ml and adjust to 20°C. This is sufficient for one sample -for a number of samples, increase quantities as appropriate. The concentration may be checked by titrating 10 ml reagent against 0.1 M NaOH using phenolphthalein indicator, when the titre should be 28.55 ml. 

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