As a high-performance preservative in the paraben sodium family, sodium propylparaben has distinctive solvent compatibility at room temperature. Soluble in water, glycerol and propylene glycol, the product possesses better ethanol solubility than sodium methylparaben and sodium ethylparaben, though its water solubility is marginally inferior to sodium ethylparaben, and it cannot dissolve in oily media. The raw material remains chemically inert when stored in dry and shaded conditions. Its aqueous formulas stay stable across weakly acidic to neutral pH environments (pH 3-7). Once exposed to strong acid, hydrolysis occurs and generates insoluble propylparaben precipitate, leading to failure of antibacterial performance. Properly sealed and stored in cool, dry and ventilated warehouses, the product can remain qualified and effective for 24 months.
Key Advantages
Sodium propylparaben is a versatile broad-spectrum antimicrobial agent, particularly powerful in eliminating molds and yeast microorganisms.
By destroying microbial membrane structures and inhibiting internal enzymatic activity, it effectively suppresses microbial proliferation.
Among all paraben preservatives, longer carbon chains bring stronger antibacterial capacity, so sodium propylparaben ranks top in bacteriostatic effect among methyl, ethyl and propyl paraben sodium salts.
Additionally, its optimized oil-water distribution property enables superior Gram-negative bacteria inhibition capacity.
With stable chemical performance and wide formula compatibility, it is a safe and reliable preservative choice for emulsified daily chemicals and medical preparations.
Specifications
| Chemical Name | Sodium Propyl 4-hydroxybenzoate |
| Molecular Formula | C10H11NaO₃ |
| CAS No. | 35285-69-9 |
| Appearance | White or almost white crystalline powder |
| Content | 98.5%～101.5% |
| PH Value(0.1% H2O Solution) | 9.5～10.5 |
| H2O | ≤5.0% |
| (Pb)mg/kg | ≤2.0 |
| Sulfate Content (as SO₄²⁻) | ≤0.030% |
| Chloride (as Cl) | ≤0.035% |
Applications
Covering personal care and pharmaceutical sectors, sodium propylparaben is a multi-scenario preservative material. It is commonly added to daily cosmetic products including skincare creams, body lotions and hair shampoos to stabilize product quality and extend shelf life. Meanwhile, it is widely adopted in pharmaceutical production, applicable to various liquid medicinal products and external skin preparations, providing stable and compliant antibacterial preservation for medical auxiliary formulations.
Packaging & Storage
Standard commercial packaging adopts 25kg lined paper drums with double food-grade inner plastic bags, and flexible custom packaging is supported for bulk orders.
To maintain stable product quality, store the goods in dry, shaded and ventilated indoor environments. Keep away from heat sources and intense sunlight, and isolate from acidic and alkaline chemical supplies at all times. Tight sealing during storage is essential to prevent moisture ingress and material agglomeration.
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 payment options can I choose?
A: We support T/T, L/C and other customized payment solutions via mutual discussion.
Q: How should this product be stored properly?
A: Seal the product completely and place it in a shady, dry and airy storage room. Prevent dampness exposure and keep out of direct solar radiation.
Q: Where is this product commonly applied?
A: It is widely utilized in cosmetic and personal care formulas including ointments, milky lotions and hair shampoo. Meanwhile, it is also suitable for pharmaceutical liquid dosage forms and external medicinal preparations.
Request a Quote/Sample
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