Promois International LT.

A “Vitamin Powder API” refers to a powdered form of one or more vitamins (and often combined micronutrients) intended for use as the active ingredient in medicinal or feed‑supplement formulations. For example, when you see “Vitamin Powder API – Powder form – used in pharmaceutical industry” in a listing.

Amoxicillin trihydrate powder is a white to off-white crystalline powder that is a semi-synthetic penicillin antibiotic used to treat bacterial infections. It is slightly soluble in water and is used in its powder form for laboratory purposes, such as in cell cultures to maintain sterile conditions, or is formulated into oral suspensions after mixing with water. 

The powder form is typically a soluble or dispersible formulation intended for veterinary use (in animals) when labelled as “powder” for drinking water or feed application.