Product Introduction

Glycerin, also known as glycerol, is a simple polyol compound. It is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic. The glycerin molecule contains three hydroxyl groups, which are responsible for its solubility in water and its hygroscopic nature. Glycerin is a versatile ingredient used in a wide range of applications.

Production Process

Glycerin can be produced through several methods, including the saponification of fats and oils, transesterification of vegetable oils, and from propylene. Saponification involves reacting fats or oils with a strong alkali, such as sodium hydroxide, to produce soap and glycerin. Transesterification involves reacting vegetable oils with an alcohol, such as methanol, to produce fatty acid methyl esters (biodiesel) and glycerin. Synthetic glycerin production involves chlorination, hypochlorination, and saponification of propylene [1].

Efficacy and Function

Glycerin functions primarily as a humectant, drawing moisture from the air into the skin, thus helping to keep the skin hydrated [2]. It also acts as an emollient, softening and smoothing the skin's surface. Furthermore, glycerin can function as a solvent, helping to dissolve other ingredients in a formulation. It's also used as a viscosity-decreasing agent [3].

Application Scenarios

Glycerin is widely used in cosmetics, personal care products, and pharmaceuticals. It can be found in moisturizers, lotions, creams, soaps, shampoos, and conditioners. In pharmaceutical applications, glycerin is used in cough syrups, suppositories, and as a humectant in wound healing products [4].

Packaging and Transportation

Glycerin is typically packaged in plastic drums, IBCs (Intermediate Bulk Containers), or stainless steel tanks, depending on the quantity. It should be stored in a cool, dry place, away from direct sunlight and heat. During transportation, containers should be properly sealed and secured to prevent leakage or damage. Glycerin is not classified as a hazardous material, so it does not require special handling during transportation [5].

Citations

[1] Chiara, V. et al. "Glycerol Production and Transformation: A Review." Energies 2023, 16, 9, 3798.
[2] Fluhr, J.W.; Darlenski, R.; Lachmann, N.; Baudouin, C.; Msika, P.; De Belilovsky, C.; Roberts, H.; Gloor, M. Glycerol and the skin: Holistic approach to its origin and functions. J. Am. Acad. Dermatol. 2008, 59, 990–993.
[3] Loden, M.; Wessman, W. The influence of a cream containing 20% glycerol and n- palmitoylethanolamide on the skin barrier, skin hydration, irritation and prevailing discomfort in atopic dermatitis: A randomized, double-blind, vehicle- controlled clinical study. Clin. Exp. Dermatol. 2017, 42, 144–158.
[4] Dawes, P.; Wilde, P. Glycerol and moisture loss in foams. Colloids Surf., A Physicochem. Eng. Asp. 2018, 538, 600–607.
[5] Transportation of Dangerous Goods Regulations. Transport Canada, 2024.

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