Butylparaben
Butyl 4-hydroxybenzoate, n-Butyl p-hydroxybenzoate, BP.
- CAS
- 94-26-8
- EC
- 202-318-7
- Sectors
- Personal Care & Cosmetics, Pharma & Healthcare
Butylparaben (CAS 94-26-8) is a long-chain paraben, the butyl ester of p-hydroxybenzoic acid, supplied as a white crystalline powder whose strong antimicrobial activity and low water solubility suit oil-rich anhydrous formulations, cosmetic creams and pharmaceutical suspensions. This High-Purity powder is less water-soluble, making it ideal for anhydrous systems.
As a Cosmetic Grade preservative, it offers superior protection against a wide array of bacteria. It is frequently selected for high-end skincare where Long-Term Stability is required.
In the pharmaceutical sector, it serves as a Technical Grade stabilizer for suspension-based medications. It prevents degradation and microbial growth in complex topical delivery systems.
Typical Properties
| Molecular formula | C11H14O3 |
|---|---|
| Molecular weight | 194.23 g/mol |
| Appearance | white crystalline powder |
| Form | Crystalline Powder |
| Color | White to almost white |
| Odor | very faint phenolic |
| Melting point | 68-69 °C |
| Boiling point | 309 °C |
| Density | 1.28 |
| Water solubility | <0.1 g/100 mL at 17 °C |
| Flash point | 181°C |
| GHS signal word | Danger · Corrosive, Irritant / harmful |
| HS code | 29182900 |
| Grades available | Cosmetic Grade, Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Butylparaben
Applications
- Anti-Aging Creams: Protects nutrient-rich formulas from microbial breakdown over extended periods.
- Medicated Suspensions: Ensures the sterility of liquid medications and gel-based delivery systems.
- Sunscreen Formulations: Provides stable preservation in oil-in-water emulsions exposed to UV.
Safety & Risks
May cause Skin Sensitization or Allergic Reactions. Wear Protective Gloves and avoid direct contact during the compounding and formulation phases.
Packaging
Packaged in 25 kg Cardboard Drums with secure moisture-proof liners.