Answer / sunil tiwari

RS stands for related substance, means by-products upon
completion of reaction, or the unreacted portion present in
the product. RS testing help us to identify the adequate
quantitiy of these by-products or unreacted part.
More over RS help us during the stability study to know any
significant change in the nature of product during long
storage in various climatic conditions

Answer / kalyan

rs test is the related substance test which are performing
to known the impurities along with main substance.

if the purity is 99.9%,is need to do assay?

3 Answers   Reddy Labs,

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what is dead time in hplc?

3 Answers   Orchid,

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how PH an important role in HPLC separation

3 Answers  

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Why dissolution test apparatus calibration with salycilic acid tablets was stopped by FDA&USP from the year of 2009?

1 Answers   Aurobindo,

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from compund pka value how to select buffer and column?

2 Answers   Emcure, Zydus Cadila,

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why in GC calibration of linearity regression coefficient should not be less than 0.999

1 Answers   Acacia, Jubilant,

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Through assay by hplc(anhydrous basis) product got 100.8% .How much the potency of that product.Moisture content is 1.7%,Sulfated ash is 0.02%,Total impurities are 0.3%

2 Answers  

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what is mean by Q in S1 and S2

3 Answers   Micro Labs,

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why we use prednisone tablet in chemical callibration of dissolution apparatus?

6 Answers   Cipla, Mylan, Umedica Laboratories,

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In gas chromatographic analysis sometimes we use headspace, why it is required instead of manually injection?

1 Answers  

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what is the difference between EP and BP

2 Answers   Novartis, Vimta Labs,

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what is the difference between hplc and uplc?

5 Answers   Fresenius Kabi, Mylan,

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