Dexpanthenol is fairly stable to air and light. 

Dexpanthenol is hygroscopic and sensitive to heat; heating over 70°C may cause race mission. 

The shelf life is 36 months from the date of production when stored in the unopened original container at room temperature(below 25°C). The effective "best use before" details stated on the label. In aqueous solutions, 

Dexpanthenol is markedly more stable than the salts of pantothenic acid, in particular at a PH of 3 to 6. 

Dexpanthenol can adjust the metabolism of protein, carbohydrate and fat, preserve the mucous on the skin surface and shine of the hair (or feather) and prevent diseases.

Dexpanthenol is applied in almost all types of cosmetic preparations. It cares hair, skin and nails. 
Dexpantheno is the provitamin of D-Pantothenic acid (Vitamin B5), which plays a key role in the human intermediary metabolism. Deficiency of Vitamin B5 can result in many dermatological disorders.

Role in the skin: 1, deep penetrating moisturizer 2, stimulates epithelisation (fibroblast proliferation and normal keratinization) 3, wound healing effect 4, anti-inflammatory effect

Role in the hair: 1, long lasting moisturizer 2, prevents hair damage 3, thickens hair 4, improves luster and sheen

Role in nail care: 1, improves hydration 2, imparts flexibility