What is the Difference Between Propylene Glycol and Glycerin

The丙烯和甘油之间的关键区别is that propylene glycol compound has two羟groups per molecule, whereas glycerin has three hydroxyl groups per molecule.

Propylene glycol and glycerin often look the same since they occur as colourless, odourless, sweet, and syrupy products. Even though they share some physical properties, they have very distinctive features. However, propylene glycol is toxic, and it is very important to identify these two compounds accurately before use.

1.Overview and Key Difference
2.What is Propylene Glycol
3.What is Glycerin
4.Propylene Glycol vs Glycerin in Tabular Form
5.Summary – Propylene Glycol vs Glycerin

What is Propylene Glycol?

Propylene glycol is a viscous and colourless liquid that is almost odourless and has a faintly sweet taste. It has the chemical formula C₃H₈O₂。丙二醇分子中有两个酒精基团。一条链中有三个碳原子，两个碳原子附着两个碳原子。因此，我们可以将其归类为二醇。此外，丙烯乙二醇与许多溶剂（例如水）混乱，acetone, and氯仿。

丙二醇可以大规模生产，主要用于生产聚合物。在工业规模上，该物质主要使用氧化丙烷产生。该物质在食品行业，药品生产和化妆品生产中使用。它可作为天然和合成物质的溶剂，作为保湿剂，冰点抑制剂，作为化妆品生产中的载体或基础，用于捕获和保存昆虫等。

What is Glycerin?

甘油或甘油是具有化学式CHCH的简单聚醇化合物₂CH₂(OH)₃。This compound is colorless, odorless, and occurs as a viscous liquid that has a sweet taste and it is also non-toxic. The backbone of this compound is made up of lipids named glycerides.

甘油具有抗菌和抗病毒特性。因此，它被广泛用作FDA批准的伤口和烧伤治疗。此外，它是一种细菌培养基，也是测量肝病的有效标记。除此之外，甘油通常被用作食品工业中的甜味剂，并用作药品配方中的保湿剂。由于它具有三个羟基，因此与水具有混杂性，并且具有吸湿性。

We can get glycerin from plant and animal sources in which it occurs as triglycerides, esters of glycerol along with long-chain carboxylic acids, etc. There are hydrolysis,saponification, or式延续processes that can be used to make the glycerol and fatty acid derivative triglyceride.

What is the Difference Between Propylene Glycol and Glycerin?

Propylene glycol and glycerin are important organic compounds. They have closely similar structures and properties. The key difference between propylene glycol and glycerin is that the propylene glycol compound has two hydroxyl groups per molecule, whereas glycerin has three hydroxyl groups per molecule. More importantly, propylene glycol is toxic, whereas glycerin is not toxic. Propylene glycol is used to absorb extra water and maintain moisture in certain medicines, cosmetics, and food products, while glycerin is used as a sweetener in the food industry, as a bacterial culture medium, used as an FDA-approved wound and burn treatment, etc.

The below infographic presents the differences between propylene glycol and glycerin in tabular form for side-by-side comparison。

Summary – Propylene Glycol vs Glycerin

Propylene glycol is an organic compound having the chemical formula C₃H₈O_2,while glycerol is a simple polyol compound having the chemical formula CHCH₂CH₂(OH)₃。The key difference between propylene glycol and glycerin is that the propylene glycol compound has two hydroxyl groups per molecule, whereas glycerin has three hydroxyl groups per molecule.

Reference:

1. “Propylene Glycol。”National Center for Biotechnology Information. PubChem Compound Database, U.S. National Library of Medicine.
2. Ajiboye, Tolu. “Find out What the Uses of Propylene Glycol Are。”非常健康的健康。

Image Courtesy:

1. “甘油Skelett” By NEUROtiker – Own work (Public Domain) via Commons Wikimedia
2. “Sample of Glycerine” By LHcheM – Own work(CC BY-SA 3.0)via Commons Wikimedia