This product is a versatile preservative with specific solubility and stability characteristics. Its solubility at 25°C is approximately 2.5 g/L in water, highly soluble in ethanol and propylene glycol, and slightly soluble in oils and fats. It maintains stable performance under acidic and neutral conditions, but may undergo hydrolysis when exposed to high temperatures.
Key Advantages
It boasts broad-spectrum antibacterial activity, effectively inhibiting the growth of molds, yeasts, and some bacteria.
The optimal pH range for its antibacterial effect is 4-7, which is compatible with most cosmetic, food and pharmaceutical formulations.
In addition, it is used at a low concentration of only 0.1%-0.3% in cosmetics and pharmaceuticals, ensuring safety while achieving good preservation results.
Specifications
| Chemical Name | 4-Hydroxybenzoic acid methyl ester |
| Molecular Formula | C₈H₈O₃ |
| CAS No. | 99-76-3 |
| Appearance | White or almost white crystalline powder |
| Content | 99.0%～100.5% |
| Melting Point | 125～128℃ |
| Acid Value | 4.0～7.0 |
| Ignition Residue | Ignition Residue ≤0.1% |
Packaging & Storage
- Packing: 25 kg/paper drum or per customer's request
- Storage Conditions: Store in a dark, dry and sealed environment with a temperature below 30°C.
- Packaging: 25 kg per barrel, which can be either a cardboard barrel or a polyethylene-lined barrel.
Quality & Service
Manufactured in an ISO-certified facility, each batch comes with a Certificate of Analysis (COA). We offer reliable supply, technical support, and competitive pricing for bulk orders.
FAQ
Q: What is the recommended addition ratio in personal care and pharma products?
A: The general recommended concentration is 0.1% to 0.3%.
Q: What is the guaranteed shelf life of the goods?
A: The product retention period is 36 months from the production date.
Q: What thermal property does the ingredient have in terms of melting point?
A: It features a melting point of 125–128°C.
Request a Quote/Sample
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