Ethylparaben

Ethylparaben (CAS 120-47-8, molecular formula C9H10O3, molecular weight 166.18) is a white crystalline or crystalline powder at room temperature, melting at 115-118°C, with an assay (on dried basis) of 98.0-102, loss on drying ≤0.50% and residue on ignition ≤0.10% (see specifications). In water it is very slightly soluble, while it dissolves freely in 96% ethanol and methanol; water-based formulas usually add it via alcohol pre-dispersion or in combination with water-soluble preservatives. According to published literature the paraben homolog antimicrobial-activity order is methyl < ethyl < propyl < butyl; it is used as a preservative component in creams, lotions and cleansing products, with a recommended use level of 0.2%-0.4% and an applicable pH range of 4-8 (reference interval, defer to the target market's limits - statutory limits for single and mixed esters are calculated combined, as the acid; verify in the actual formulation).

Used in cosmetics and personal care as a preservative and antimicrobial agent, reported active against molds, yeasts and bacteria. Downstream applications include creams, lotions and personal care products; finished-product shelf life is subject to the buyer's preservative challenge testing. Often combined with other parabens (methyl, propyl, butyl). Recommended dosage: 0.2%–0.4% (reference interval, defer to the target market's limits; statutory limits for single and mixed esters are calculated combined, as the acid), applicable pH range 4–8.

Emulsified systems such as creams and lotions are the typical application scenario for ethylparaben; formulas usually treat the oil and water phases separately, and since its water solubility is very low while it dissolves freely in ethanol (96%) (see specifications), it is commonly pre-dispersed in alcohol or added after emulsification. The recommended use level of 0.2%-0.4% (reference interval; defer to the target market's limits; statutory limits for single and mixed esters are calculated combined, as the acid) and pH range of 4-8 are reference values given on this page - verify in the actual formulation.

Shampoos, body washes and facial cleansers are mostly water-based; ethylparaben serves as a preservative component, often combined with other parabens such as methyl, propyl and butyl esters. Blend ratios and addition process are set by the formulator.

Combining ethylparaben with other parabens (methyl, propyl, butyl) is common practice; the different esters complement each other in solubility and antimicrobial targets. Actual combinations and ratios should be verified in the formulation; planned blend partners can be provided at inquiry for specification checking.