Methylparaben, also known as methyl 4-hydroxybenzoate, is a common preservative used in various personal care products, pharmaceuticals, and food items. Its chemical structure is represented as follows:
Its molecular formula is C8H8O3, and it belongs to the class of compounds known as parabens, which are esters of parahydroxybenzoic acid.
Physical Properties:
Appearance: Methylparaben typically appears as a white, odorless, crystalline powder.
Solubility: It is sparingly soluble in water but dissolves readily in alcohol, ether, and other organic solvents.
Melting Point: Methylparaben has a relatively low melting point, around 125-128°C.
Boiling Point: The compound decomposes before reaching its boiling point under standard atmospheric conditions.
Density: The density of methylparaben is approximately 1.23 g/cm³.
![Chemical structure and physical properties of Methylparaben-Xi'an Lyphar Biotech Co., Ltd Chemical structure and physical properties of Methylparaben-Xi'an Lyphar Biotech Co., Ltd](https://www.biolyphar.com/wp-content/uploads/2024/07/2024070107311112.jpg)
Chemical Properties:
Preservative Action: Methylparaben is effective against a broad spectrum of microbes, including bacteria and fungi, making it a valuable preservative in various products.
Ester Hydrolysis: Like other parabens, methylparaben can undergo hydrolysis, particularly under alkaline conditions, leading to the formation of p-hydroxybenzoic acid and methanol.
Stability: It is relatively stable under normal conditions but can degrade when exposed to light, heat, or certain pH ranges.
Compatibility: Methylparaben is compatible with most cosmetic ingredients and pharmaceutical formulations, although it may interact with certain compounds under specific conditions.
Regulatory Status: Methylparaben has been approved for use in cosmetics and food products by regulatory agencies such as the U.S. Food and Drug Administration (FDA) and the European Union.
![Chemical structure and physical properties of Methylparaben-Xi'an Lyphar Biotech Co., Ltd Chemical structure and physical properties of Methylparaben-Xi'an Lyphar Biotech Co., Ltd](https://www.biolyphar.com/wp-content/uploads/2024/07/2024070107320032.jpg)
It’s worth noting that while methylparaben has been widely used as a preservative for decades, there has been some controversy regarding its safety and potential health effects, particularly its potential to mimic estrogen in the body. As a result, some manufacturers have started to explore alternative preservatives.