Methylparaben

Methylparaben (CAS 99-76-3, molecular formula C8H8O3, molecular weight 152.15) is a colorless crystalline or white crystalline powder at room temperature, melting at 125-128°C, with an assay (on dried basis) of 99.0-100.5 and p-hydroxybenzoic and salicylic acid ≤0.10% (see specifications). For solubility, 1 g dissolves in 400 mL of water or 40 mL of warm oil, and it is freely soluble in alcohol, ether and acetone - one of the more water-soluble members of the paraben series. In cosmetic and personal care formulas, published literature reports inhibitory activity against molds and yeasts; it is used as a preservative component, and finished-product shelf life is subject to the buyer's preservative challenge testing, often combined with other preservatives. Whether a specific use is permitted and its use limits follow the current regulations of the target market, and buyers are responsible for confirming compliance.

Used in cosmetics and personal care as a preservative and antimicrobial agent in formulations; published literature reports inhibitory activity against molds and yeasts. Finished-product shelf life is subject to the buyer's preservative challenge testing. Often used in combination with other preservatives. Whether a specific use is permitted and its use limits follow the current regulations of the target market, and buyers are responsible for confirming compliance.

Methylparaben dissolves at 1 g in 400 mL of water (see specifications), which makes it easy to incorporate into water-based systems such as toners, gels and lotion bases; timing and dissolution method follow each formula's process, and in cold processing pre-dissolving in a portion of the water phase is recommended. pH fit and preservative performance should be verified in the actual formulation; this page provides no regulatory limit values.

Shampoos, body washes and hair conditioners are mostly water-based; methylparaben serves as a preservative component and is often combined with other preservatives (see Usage). Blend design is verified by the formulator; buyers can review assay (99.0-100.5) and appearance against the specifications on this page.

Exported cosmetics and personal care products must meet the target market's listing requirements for the preservatives used; whether a specific use is permitted, its use limits and labelling follow the current regulations of the target market, and buyers are responsible for confirming compliance. No limit values are provided on this page.