stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?

2 Answers   Nakoda Chemicals,

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what is principle of XRD?

3 Answers   Cipla,

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why you are using benzoic acid for water content determination in TEA

2 Answers  

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control of resolution in calibration of IR

3 Answers  

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Why sulfuric acid is used in sulphated ash / residue on ignition test.

9 Answers   CS Pharmaceuticals, Dr Reddys, GVK, HPLC, Micro Labs, Samrudh, Watson Pharmaceuticals, Wings Customer Care,

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what is the difference of use of LOD test and Karl Fischer titra.?

15 Answers  

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How much carbon loading in nomalphase columns?

5 Answers  

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How to establish pKa for a new API molecule ?

2 Answers   Neuland, Sun Pharma,

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How to decided test concentration in GC analysis.

3 Answers  

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how ir specrometer is calibrated ?

1 Answers  

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What is chiral and why this performing in HPLC

4 Answers   Hetero, Macleods,

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what is the difference between loss on drying in ordinary oven technique and vacuum oven technique

4 Answers   Divis Laboratories, Ranbaxy,

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