Gelatin (Pharma Grade)

Gelatin is not a single defined molecule but a hydrolysed form of collagen, the fibrous structural protein that makes up skin, bone and connective tissue in animals; partial hydrolysis breaks the long, triple-helical collagen structure down into shorter protein chains that, unlike collagen itself, dissolve in warm water and then reform a thermoreversible gel on cooling — melting again when warmed, setting again when cooled, a cycle that can be repeated and is the entire basis of gelatin's usefulness. Bloom strength, a standardised measure of gel rigidity, is the single most important grade-differentiating specification: a higher Bloom value gives a firmer, more rigid gel at a given concentration, and pharmaceutical capsule-shell manufacture specifies a particular Bloom range to achieve the shell thickness, dissolution behaviour and mechanical handling properties each capsule type requires.

As supplied, pharmaceutical-grade gelatin is a pale yellow to amber, essentially odourless granule or powder. Because it is sourced from animal connective tissue, every batch carries full traceability documentation back to source and processing method, a requirement that matters considerably more for pharmaceutical gelatin than for the food-grade material used in confectionery and other general applications.

Where it fits in the value chain

Pharmaceutical-grade gelatin's largest use by far is as the shell-forming material for both hard (two-piece) and soft (one-piece, softgel) capsules, the dosage form chosen for a very large share of oral solid pharmaceutical and nutraceutical products. A separate pharmaceutical use is as a binder and coating agent in tablet manufacture, and as a stabiliser and suspending agent in certain liquid and injectable formulations. Food- and nutraceutical-grade material, differentiated mainly by its less stringent sourcing and testing regime, is used across confectionery, dairy and functional-food applications, though our pharma-grade product line is positioned specifically for capsule and tablet manufacture.

Grades we supply

Chelora Chemicals offers pharmaceutical-grade Gelatin meeting USP/EP pharmacopoeial specifications, across a range of Bloom strengths suited to hard-capsule, soft-capsule and tablet-binder applications. Each grade is supplied with a batch-wise certificate of analysis covering Bloom strength, viscosity, moisture content and microbial limits.

Gelatin is produced by controlled hydrolysis of collagen extracted from bovine or porcine bone and hide, using one of two broad pre-treatment routes. The acid process (giving Type A gelatin, typically from porcine skin) soaks the raw collagen material in dilute acid for a comparatively short conditioning period before hot-water extraction; the alkaline (liming) process (giving Type B gelatin, typically from bovine hide and bone) soaks the material in lime for a much longer conditioning period, which more thoroughly breaks down certain collagen crosslinks before extraction. Either way, the conditioned collagen is then extracted with hot water in a series of progressively hotter batches, each giving a slightly different Bloom strength and viscosity, which are blended to hit the buyer's specified grade.

The extracted gelatin solution is filtered, concentrated, sterilised and dried, typically by extrusion through a die followed by controlled drying, to give the final granule or powder form. Pharmaceutical-grade material undergoes additional processing and testing steps, including viral-inactivation validation and tighter microbial and heavy-metal control, beyond what food-grade material requires, reflecting its intended use in a dosage form taken internally.