Methylparaben
Methyl 4-hydroxybenzoate, E218, MP, Methyl parahydroxybenzoate.
- CAS
- 99-76-3
- EC
- 202-785-7
- Sectors
- Personal Care & Cosmetics, Food & Nutrition, Pharma & Healthcare
Methylparaben (CAS 99-76-3), also known as E218 or methyl 4-hydroxybenzoate, is a white crystalline powder from the paraben family and one of the most widely used preservatives, valued for antifungal activity that protects water-based cosmetics, food, and ophthalmic solutions against mold and yeast. This USP/NF Grade material is a staple in water-based formulations.
It provides a robust defense against mold and yeast, ensuring the High-Purity and safety of consumer goods. It is naturally occurring in fruits, reinforcing its profile as a reliable Food Grade additive.
In industrial applications, it is valued for its Technical Grade stability and compatibility with surfactants. It is odorless and colorless, maintaining the integrity of the final product.
Typical Properties
| Molecular formula | C8H8O3 |
|---|---|
| Molecular weight | 152.15 g/mol |
| Appearance | white crystalline powder |
| Form | Crystalline Powder |
| Color | White to almost white |
| Odor | odorless or faint char. odor, sl. burning taste |
| Melting point | 131 °C |
| Boiling point | 265 °C |
| Density | 1.383 g/cm³ (crystalline) @ Temp: 25 °C; Press: 750 Torr |
| Water solubility | Slightly soluble in water. |
| Flash point | 280°C |
| pH | 5.8 (H2O, 20°C) (saturated solution) |
| GHS signal word | Warning · Irritant / harmful, Environmental hazard |
| HS code | 29182930 |
| Grades available | Pharma Grade, Food Grade, Cosmetic 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.
Methylparaben
Applications
- Skincare & Makeup: Found in water-based cosmetics, including foundations and facial cleansers.
- Food Preservation: Used as E218 to extend the shelf life of baked goods and syrups.
- Ophthalmic Solutions: Serves as a gentle preservative in eye drops and contact lens solutions.
Safety & Risks
Generally recognized as safe (GRAS). Exposure to powder may cause Respiratory Irritation. Use a Dust Mask and Safety Goggles when handling large quantities.
Packaging
Supplied in 25 kg Fiber Drums or 500 kg Super Sacks for high-volume users.