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| Catalog Number | CI-GU-0200 |
| Product Name | Ethylparaben |
| CAS | 120-47-8 |
| Structure |  |
| Synonyms | Benzoic acid, 4-hydroxy-, ethyl ester;p-Hydroxybenzoic acid ethyl ester;Ethyl 4-hydroxybenzoate;Ethylparaben;Ethyl p-hydroxybenzoate;Ethyl paraben |
| IUPAC Name | ethyl 4-hydroxybenzoate |
| Molecular Weight | 166.17 g/mol |
| Molecular Formula | C9H10O3 |
| InChI | InChI=1S/C9H10O3/c1-2-12-9(11)7-3-5-8(10)6-4-7/h3-6,10H,2H2,1H3 |
| InChI Key | NUVBSKCKDOMJSU-UHFFFAOYSA-N |
| Boiling Point | 297-298 °C |
| Melting Point | 114-117 °C |
| Purity | 95% |
| Density | 1.17 g/mL |
| Appearance | Solid |
| Isomeric SMILES | CCOC(=O)C1=CC=C(C=C1)O |
| pKa | 8.31±0.13 |
Ethylparaben, an ethyl ester of p-hydroxybenzoic acid, is a widely utilized preservative in personal care products, pharmaceuticals, and certain food categories, adhering to national food additive regulations. This white, crystalline powder is known for its robust antimicrobial properties, effectively inhibiting the growth of mold fungi, yeasts, and bacteria across a broad spectrum. Compared to traditional preservatives such as benzoic and sorbic acids, ethylparaben remains active over a wider range of pH and conditions, enhancing its versatility. Its eco-friendly nature allows it to degrade rapidly under environmental conditions without posing a hazard. With a low toxicity profile and extensive documented use over decades, ethylparaben is safe for use in cosmetic and pharmaceutical concentrations and is compatible with nearly all cosmetic ingredients. It does not contain halogens or release formaldehyde. Often used alongside Propylparaben, ethylparaben's efficacy is enhanced when paired with compounds like hydantoins and phenoxyethanol, which potentiate its preservative action.
What is Ethylparaben and how is it used?
Ethylparaben is the ethyl ester of p-hydroxybenzoic acid and serves as a commonly used preservative in personal care products. It is a white, crystalline powder that effectively inhibits the growth of mold fungi, yeasts, and bacteria. This makes it an essential component in securing the quality and safety of various cosmetic and pharmaceutical products. Ethylparaben is also used in some foodstuffs in accordance with national food additive regulations.
How does Ethylparaben compare to other preservatives?
Ethylparaben offers a broader performance spectrum than classic preservatives like benzoic and sorbic acids. It remains active over a larger range of pH levels and other conditions, which enhances its effectiveness in preserving products. Its antimicrobial activity is comprehensive, covering almost all microorganisms responsible for spoiling cosmetics and pharmaceuticals.
Is Ethylparaben environmentally friendly?
Yes, Ethylparaben is considered eco-friendly. It degrades rapidly under down-the-drain conditions without posing an environmental hazard. This property makes it a preferable choice for those concerned about the environmental impact of preservatives.
What safety profile does Ethylparaben have?
Ethylparaben possesses a low toxicity profile, making it safe for use in prescribed concentrations in cosmetics and pharmaceuticals. It has been used extensively for many decades, demonstrating a well-documented safety record. Additionally, it is colorless, odorless, and does not contain halogens or release formaldehyde, further contributing to its compatibility with a wide range of cosmetic ingredients.
Can Ethylparaben be combined with other preservatives?
Yes, Ethylparaben can be effectively combined with other parabens and classic preservatives, enhancing its effectiveness. When used in conjunction with compounds like hydantoins and phenoxyethanol, its preservative action is potentiated. It is often used with Propylparaben to achieve optimal preservation results.
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