Methylparaben

Catalog	BBC99763
CAS	99-76-3
Structure
Description	Methylparaben, also methyl paraben, one of the parabens, is a preservative with the chemical formula CH3(C6H4(OH)COO). It is the methyl ester of p-hydroxybenzoic acid.
Synonyms	Methyl-4-hydroxybenzoat
IUPAC Name	Methyl 4-hydroxybenzoate
Molecular Weight	152.15
Molecular Formula	C8H8O3
Canonical SMILES	COC(=O)C1=CC=C(C=C1)O
InChI	InChI=1S/C8H8O3/c1-11-8(10)6-2-4-7(9)5-3-6/h2-5,9H,1H3
InChI Key	LXCFILQKKLGQFO-UHFFFAOYSA-N
Boiling Point	298.6 °C
Melting Point	125-128 °C (lit.)
Flash Point	280 °C
Purity	98%
Density	1.46 g/ml
Solubility	Slightly soluble in water
Appearance	White powder
Application	Methylparaben serves as a crucial antimicrobial preservative widely utilized across the cosmetic, food, and pharmaceutical industries. Its primary purpose is to extend the shelf life of products by providing bacteriostatic and fungistatic protection against a wide range of microorganisms. This colorless or white crystalline powder, which is either odorless or nearly so, is favored for its low sensitizing potential and is most effective at concentrations ranging from 0.03 to 0.30 percent in cosmetic applications. As one of the most common parabens, methylparaben naturally occurs in fruits like blueberries and can be synthesized for broader use. Its ability to maintain product effectiveness makes it an essential component in beauty products like cleansers, moisturizers, and foundations, as well as various food items. The antimicrobial efficacy of methylparaben is particularly pronounced against yeasts and molds, making it a preferred choice for maintaining the quality and safety of several consumer goods.
EC Number	243-171-5;202-785-7
pKa	5.8
Refractive Index	n20/D 1.4447(lit.)
Vapor Pressure	2.37X10-4 mm Hg at 25 °C (est)