Difference between related substances & impurities

Answer Posted / b.gangatharan

Related substance means some process related compounds or by products and degradation compounds which are unwanted one produced during the manufacturing process of API products.if the related substance is very high means the reaction is not completed properly.the structure and properties of related substance partialy identical with main product.
Impurities means some unwanted substances produced due to contamination during manufacturing process.moreover the structure and properties of impurity will be completely different from the main product.

THANKS&REGARDS,
B.GANGATHARAN,
CHENNAI.

Is This Answer Correct ?    15 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why multimedia dissolution require to do?

302


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1975


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

6848


How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

267


why we are using benzene, anyline in acetic anhdride assay titration method?

1569






How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3380


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

1298


for which product require to do content uniformity? what is limit of cu?

302


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

1745


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

1092


What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

6863


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1350


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

2031


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

1547


[3/30, 13:29] Manoj P Venkatpurwar: How hplc column selection according to structure? How mobile phase buffer selection on molecule structure?

299