This preservative product exhibits distinct solubility and stability traits. Specifically, its water solubility is around 2.5 g/L at 25°C, it is readily soluble in ethanol and propylene glycol, and slightly soluble in grease. It remains stable when in acidic or neutral conditions, but high temperatures may lead to its hydrolysis
Key Advantages
One of its core advantages is broad-spectrum antibacterial activity, which can effectively inhibit molds, yeasts and some types of bacteria.
The optimal pH value for its antibacterial function ranges from 4 to 7, adapting to most common formulation requirements.
Additionally, it is used at a low concentration of 0.1%-0.3% in cosmetics and pharmaceuticals, ensuring both preservation efficiency and safety.
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: .25kg/paper drum or subject to customer requirements
- Storage Instructions: Preserve in a dark, dry and sealed place, with the temperature not exceeding 30°C.
- Packaging: Each barrel contains 25 kg, and the barrel type can be cardboard or polyethylene-lined.
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 shelf life of the product?
A: The shelf life is up to 36 months under proper storage.
Q: What is the melting point range of the ingredient?
A: Its melting point is between 125°C and 128°C.
Q: Are there any key warnings during application and storage?
A: Avoid contact with strong oxidants. Prior compatibility assessment is necessary, particularly in high pH environments or at elevated temperatures.
Request a Quote/Sample
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