Sodium Butylparaben is a specialty cosmetic ingredient belonging to the hydroxybenzoate/paraben family. Chemically, it is the sodium salt of butylparaben, also known as butyl 4-hydroxybenzoate sodium salt. The compound has the molecular formula C₁₁H₁₃NaO₃ and molecular weight 216.21 g/mol.
The ingredient is documented for use in cosmetic preservative systems. Its suitability for a finished formulation depends on formulation composition, concentration, pH, compatibility and the regulatory requirements applicable to the destination market.
Sodium Butylparaben is the sodium salt associated with Butylparaben. PubChem lists synonyms including Butylparaben Sodium, Sodium Butylparaben, Butyl 4-hydroxybenzoate sodium salt, and Sodium butyl 4-hydroxybenzoate.
It should be distinguished from neutral Butylparaben, which has CAS 94-26-8 and molecular formula C₁₁H₁₄O₃. Sodium Butylparaben has the additional sodium component and a molecular weight of 216.21 g/mol.
Sodium Butylparaben is identified as a preservative in cosmetic ingredient information. PubChem's cosmetic classification references the Cosmetic Ingredient Review and identifies its cosmetic use as preservative.
As a sodium salt of a hydroxybenzoate ester, it can be considered when developing preservation systems where this specific chemical form is appropriate.
| Property | Value |
|---|---|
| Chemical Name | Butyl 4-Hydroxybenzoate Sodium Salt |
| CAS Number | 36457-20-2 |
| EC Number | 253-049-7 |
| Molecular Formula | C₁₁H₁₃NaO₃ |
| Molecular Weight | 216.21 g/mol |
| Parent Compound | Butylparaben |
| Chemical Class | Hydroxybenzoate / Paraben Salt |
| IUPAC Name | Sodium 4-butoxycarbonylphenolate |
These identity values are supported by PubChem and the Korean Cosmetic Association ingredient database.
Sodium Butylparaben is a solid ingredient. The Korean Cosmetic Association identifies the material as the sodium salt of butylparaben, while PubChem provides its chemical structure and molecular characteristics.
For the SDP commercial page, the exact appearance should be taken from the approved internal specification and current COA.
Sodium Butylparaben is documented as a preservative cosmetic ingredient.
Preservative performance is formulation-dependent. Factors including pH, water activity, concentration, packaging, manufacturing hygiene and interactions with other formulation ingredients can influence the overall preservation system.
When evaluating Sodium Butylparaben as a cosmetic ingredient, formulators should consider:
Appropriate formulation and preservative-efficacy testing should be performed before commercialization.
Sodium Butylparaben has a specific entry in the EU Cosmetics Regulation Annex V. The current consolidated Annex V lists Butyl 4-hydroxybenzoate and its salts, including Sodium Butylparaben (CAS 36457-20-2; EC 253-049-7).
For this group, the EU regulation specifies a maximum concentration of 0.14% as acid for the sum of the individual concentrations of butylparaben, propylparaben and their salts. It also specifies conditions concerning certain mixtures and leave-on products intended for application to the nappy area of children under three years.
EU Regulation 1004/2014 explains that sodium and potassium salts of butyl- and propylparabens were subjected to the same conditions as the corresponding esters.
Therefore, the page should not claim unrestricted cosmetic approval. Regulatory compliance should be evaluated against the current legislation and the exact finished-product formulation.
For commercial Sodium Butylparaben Cosmetic Ingredient, quality control may include:
Numerical acceptance criteria should come from the approved SDP specification rather than being copied from another manufacturer's product.
Sodium Butylparaben should be stored according to the current SDP specification and SDS.
General handling practices include:
| Parameter | Specification |
|---|---|
| Appearance | White or colourless crystals / white powder |