The standard
How it is made.
Vitamin C is not a difficult molecule to buy. It is a difficult one to hold to specification through compression, packing, and two years on a shelf in an Indian summer. This section is about the factory, not the products.

01
Indian Pharmacopoeia
Celin 500 and Celin Chewable are made to IP standard. That is a pharmacopoeial monograph with defined limits for identity, assay, and impurities — not a self-declared specification.
02
Made to the highest quality standard
Celin is made in RV’s own plant, against a specification the company does not get to write for itself, and released batch by batch before a tablet ever reaches a carton. Quality here is a release criterion, not an adjective.
03
Overages, declared
Ascorbic acid degrades with heat, light and moisture. Celin DZ carries a declared overage on pack — added potency to compensate for loss during storage, so the tablet meets its label through shelf life rather than only on the day it was made.
04
Tested against a published standard
An IP monograph is not a target the manufacturer sets. It defines the identity, assay and impurity limits a batch must meet, and those are the limits a batch is released against.