Propyl Parabene

EP, USP (Tested for Endotoxin & Microbes)

CAS #:


Molecular Formula:



propyl 4-hydroxybenzoate, Propyl-p-hydroxybenzoate, Benzoic acid, 4-hydroxy-, propyl ester, p-Hydroxybenzoic acid propyl ester

Molecular Weight:

180.2 g/mol


Propylparaben is used as an antimicrobial preservative. It is a Standardized Chemical Allergen. The physiologic effect of propyl paraben is by means of Increased Histamine Release, and Cell-mediated Immunity. The chemical classification of propylparaben is Allergens.

Characters Unit Specification
Appearance white or almost white, crystalline powder
Assay % 98.0 – 102.0
Identification A (IR) complies
Identification B (Melting point) °C 96 - 99
Appearance of solution complies
Colour of solution (USP) complies
Acidity ml of 0.1M NaOH max. 0.1
Residue on Ignition (USP) % max. 0.1
Sulphated ash (Ph. Eur.) % max. 0.1
Related substances
Impurity A % max. 0.5
Unspecified impurities % max. 0.5
Total % max. 1.0
Total aerobic microbial count cfu/g max. 100
Total yeasts and moulds count cfu/g max. 50
E.coli cfu/g absent in 1g
Pseudomonas aeruginosa cfu/g absent in 1g
Staphylococcus aureus cfu/g absent in 1g
Salmonella cfu/g absent in 25g
Residual Solvents (Ph. Eur., USP) According to requirements

Shelf Life/Retest Date: Propyl Paraben can be kept for at least 3 years if stored under recommended conditions.

Storage/Shipping Conditions:

  • Keep container tightly closed in a dry and well-ventilated place.
  • Store at room temperature in the original container.
  • Store away from incompatible materials.

Pack Sizes: 0.5 Kg

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