Preservatives & Biocides
REACH
Propylparaben sodium
CAS Number
35285-69-9
EC Number
252-488-1
E Number
E216
What is Propylparaben sodium?
Propylparaben sodium (CAS 35285-69-9), also known as E217, is the water-soluble sodium salt form of propylparaben, developed to overcome the limited aqueous solubility of its parent ester.
Where is Propylparaben sodium used?
- Food and beverage: antimicrobial preservative in aqueous-based sauces and beverages
- Bakery fillings: water-soluble preservative for direct incorporation
- Pharmaceuticals: protects oral suspensions, syrups, and topical formulations
- Personal care: preservative in lotions, shampoos, and liquid cosmetics
- It is often combined with methylparaben or other paraben salts for broader antimicrobial coverage.
Good to know: The water-soluble salt form is particularly useful where high water content would otherwise limit standard propylparaben use.
Commercial specifications
- Food-grade and pharmaceutical-grade specifications; the latter conforming to USP, BP, and Ph. Eur. standards
- Packaging in kilogram bags through to bulk quantities
Other Names (Synonyms)
Sodium propylparaben|Propyl 4-hydroxybenzoate sodium salt|Sodium propyl 4-hydroxybenzoate|Caswell No. 714A|Sodium propyl hydroxybenzoate|Propylparaben sodium [USAN]|Propyl p-hydroxybenzoate, sodium salt|Benzoic acid, 4-hydroxy-, propyl ester, sodium salt (1:1)|E217
What are the physical properties of Propylparaben sodium?
Melting Point 302°C
Density 1.24 g/cm3 (25 °C)
Appearance White or almost white, hygroscopic, crystalline powder.
Color White to Off-White
Form Solid
Water Solubility 1000g/L at 23℃
Vapor Pressure 0.001Pa at 20℃
pH 9.5-10.5 (1g/l, H2O, 20°C)
Log P 0.27 at 23℃
How is Propylparaben sodium classified and handled safely? Learn More
Danger
GHS05· Corrosive
Hazard Statements
H318 Causes serious eye damage
H412 Harmful to aquatic life with long lasting effects
Precautionary Statements
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P317 Get emergency medical help.
P501 Dispose of contents/container in accordance with local regulations.
P264+P265 Wash … thoroughly after handling.
P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Which trade and regulatory codes apply to Propylparaben sodium?
HS Code 2918 29 00
Storage Class 11 - Combustible Solids
WGK (Germany) 2