Sodium Propylparaben
Propylparaben Sodium, Sodium Propyl 4-Hydroxybenzoate, Solbrol P Sodium.
- CAS
- 35285-69-9
- EC
- 252-488-1
- Sectors
- Personal Care & Cosmetics, Food & Nutrition, Pharma & Healthcare
Sodium Propylparaben (CAS 35285-69-9) is the water-soluble sodium salt of propylparaben, supplied as a white to almost white, hygroscopic crystalline powder, and it is used as a broad-spectrum antimicrobial preservative in aqueous cosmetic, food and pharmaceutical formulations. It is widely used in Food Grade and USP/BP Grade applications due to its high effectiveness against yeasts, molds, and gram-positive bacteria.
This antimicrobial agent is ideal for aqueous formulations where standard parabens lack sufficient solubility. It provides broad-spectrum protection, ensuring the microbiological stability and extended shelf life of lotions, beverages, and liquid medications.
The compound is a white crystalline powder that dissolves easily in cold water, simplifying the manufacturing process for large-scale production. It maintains high stability across a variety of pH levels, making it a versatile choice for complex cosmetic emulsions.
Typical Properties
| Molecular formula | C10H12O3.Na |
|---|---|
| Molecular weight | 202.18 g/mol |
| Appearance | White or almost white, hygroscopic, crystalline powder. |
| Form | Solid |
| Color | White to Off-White |
| Melting point | 302°C |
| Density | 1.24 g/cm3 (25 °C) |
| Water solubility | 1000g/L at 23°C |
| pH | 9.5-10.5 (1g/l, H2O, 20°C) |
| GHS signal word | Danger · Corrosive |
| Grades available | Food Grade, Pharma 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.
Sodium Propylparaben
Applications
- Cosmetic Preservation: Prevents microbial growth in water-based personal care products including shampoos, lotions, and liquid make-up.
- Food Additive (E217): Acts as a preservative in confectionery, meat products, and flavored syrups to prevent fungal spoilage.
- Pharmaceuticals: Used in the preservation of oral liquid suspensions and topical ointments to maintain sterility and safety.
Safety & Risks
Classified as a Serious Eye Damage (Cat 1) agent. It can cause Skin Irritation and respiratory irritation if dust is inhaled. Mandatory PPE includes safety goggles, dust masks (N95), and protective gloves.
Packaging
Standard packaging includes 1 kg Foil Bags, 5 kg Tins, and 25 kg Fiber Drums.