Differences between  seed and grain

Seed	Grain
It should be a viable one	Need not be a viable one
It should have maximum genetic and physical purity	Not so
Should satisfy minimum seed certification standards	No such requirements
It should be completely treated with pesticide/fungicide to protect seed against storage pests and fungi	It should never be treated with any chemical, since used for consumption
Respiration rate and other physiological and biological processes should be kept at low level during storage	No such specifications
Should be compulsorily certified/truthful  labeled	No such condition in grain production
Should  never be converted into grain unless warranted	Can be converted as seed provided  the situation warrants
It should satisfy all the quality norms	Not considered