Gelatin, colorless to light yellow solid, in powder, flake or block form. Glossy, odorless and tasteless. Relative molecular weight is about 50,000 to 100,000. Relative density is 1.3 to 1.4. It is insoluble in water, but when soaked in water, it can absorb 5 to 10 times the amount of water and swell and soften. If heated, it will dissolve into a colloid, and become a gel when cooled to below 35 to 40°C; if the aqueous solution is boiled for a long time, the properties will change due to decomposition, and no gel will form after cooling. It is insoluble in ethanol, ether and chloroform, but soluble in hot water, glycerol, propylene glycol, acetic acid, salicylic acid, phthalic acid, urea, thiourea, thiocyanate and potassium bromide. This product does not solidify at a concentration below 5%, and usually forms a gel with a 10% to 15% solution. The gelling temperature varies with the concentration, coexisting salts and pH value. The viscosity and gel strength vary depending on the relative molecular mass distribution, and are also affected by pH, temperature and electrolytes. If the solution of this product meets formaldehyde, it will become an irreversible gel that is insoluble in water. This product is easy to absorb moisture and will spoil due to bacteria. Please pay attention when storing it. Various amino acids can be obtained when hydrolyzed.

DIFFERENCE FROM COLLAGEN

Gelatin is a type of protein obtained by partial hydrolysis of collagen. Gelatin and collagen are homologous. Collagen has a rod-shaped triple helix structure. When it is partially hydrolyzed to prepare gelatin, this triple helix structure of collagen is partially separated and broken. The amino acid composition of gelatin is similar to that of collagen, but the composition may also be different due to differences in pretreatment.

PRODUCT USE

In food, it can be used as: candy additives, frozen food improvers, meat product improvers, beverage clarifiers, food coating materials,

In medicine, it can be used as: capsules, plasma expanders, tissue engineering

Other applications: photosensitive industry, daily chemical industry, papermaking