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Sodium Sulfate

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1.What is the properties of anhydrous sodium sulfate?
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2.What is the facts of sodium sulphate anhydrous?

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Sodium Sulfate BP

Sodium Sulfate BP

 

Sodium Sulfate BPName: Anhydrous Sodium Sulfate BP
Action and Use: Laxative.
Content: 98.5 per cent to 101.0 per cent (dried substance).
Characters
Appearance: White or almost white powder, hygroscopic.
Solubility: Soluble in water.
Identification
A. It gives the reactions of sulphates.
B. It gives the reactions of sodium.
C. It complies with the test for loss on drying (see Tests).
Appearance of Solution: Solution S is clear and colourless.
Acidity or Alkalinity:
To 10 ml of solution S add 0.1 ml of bromothymol blue solution R1 . Not more than 0.5 ml of 0.01M hydrochloric acid or 0.01M sodium hydroxide is required to change the colour of the indicator.
Chlorides: Maximum  450 ppm.
Calcium : Maximum 450 ppm, if intended for use in the manufacture of parenteral dosage forms.
Iron:Maximum 90 ppm, if intended for use in the manufacture of parenteral dosage forms.
Magnesium:Maximum 200 ppm, if intended for use in the manufacture of parenteral dosage forms. To 10 ml of solution S add 1 ml of glycerol (85 per cent), 0.15 ml of titan yellow solution, 0.25 ml of ammonium oxalate solution and 5 ml of dilute sodium hydroxide solution and shake. Any pink colour in the test solution is not more intense than that in a standard prepared at the same time in the same manner using a mixture of 5 ml of magnesium standard solution (10 ppm Mg) and 5 ml of water .
Heavy Metals:Maximum  45  ppm.
Loss On Drying

Maximum  0.5 per cent, determined on 1.000 g by drying in an oven at 130 °C.