Potassium Propylparaben
AKA “Potassium propyl 4-oxidobenzoate, UNII-9THL6FXS4I, 9THL6FXS4I, EINECS 284-597-5, DTXSID80233975, Benzoic acid, 4-hydroxy-, propyl ester, potassium salt, BENZOIC ACID, 4-HYDROXY-, PROPYL ESTER, POTASSIUM SALT (1:1), RefChem:175587, DTXCID10156466”
Preservative
Ingredient Facts
Potassium propylparaben
AKA: Potassium propyl 4-oxidobenzoate, UNII-9THL6FXS4I, 9THL6FXS4I, EINECS 284-597-5, DTXSID80233975, Benzoic acid, 4-hydroxy-, Propyl ester, Potassium salt, BENZOIC ACID, 4-HYDROXY-, PROPYL ESTER, POTASSIUM SALT (1:1), RefChem:175587, DTXCID10156466
Preservative · Preservative · EWG: 4
Synthetic
Preservative
Not Clean
Potassium propyl 4-oxidobenzoate
Formula
C10H11KO3
Mol. Weight
218.29
CAS #
84930-16-5
Form
Powder
See origin →
Functions
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Preserves Formula
Prevents microbial growth
Traditional Use
A synthetic preservative developed in the early 20th century as part of the paraben family of antimicrobials. Created to prevent microbial spoilage in cosmetic formulations.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not Phototoxic
medical-approval
all-shades-safe
Concentration Guide
14.0%
0%20%
Reg. Limit
EU regulatory limit: 14.0%. - 0,14% (as acid) for the sum of the individual concentrations - 0,8% (as acid) for mixtures of substances mentioned in entry 12 and 12a, here the sum of the individual concentrations of butyl and propylparaben and their salts does not exceed 0,14%. For leave -on products designed for children under three years of age: Do not use on the nappy area Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 12 bis. Dermal absorption: 0.1%. Source: CIR Safety Assessment (CIR Seq 746).
Regulatory Agencies
Benzyl Alcohol, Benzoic Acid, Sodium Benzoate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Benzyl Alcohol, Benzoic Acid, and Sodium Benzoate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Safety Assessment of Benzyl Alcohol, Benzoic Acid and its Salts, and Benzyl Benzoate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
4-Hydroxybenzoic acid rescues multisystemic disease and perinatal lethality in a mouse model of mitochondrial disease.
Corral-Sarasa J, Martínez-Gálvez JM, González-García P, Wendling O, Jiménez-Sánchez L et al.
Cell reports, 2024
4-Hydroxybenzoic Acid
European Commission
EU Cosmetic Ingredient Database (CosIng)
Isopropyl Ester of PVM/MA Copolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Potassium Propylparaben
European Commission
EU Cosmetic Ingredient Database (CosIng)
Benzoic acid and its derivatives as naturally occurring compounds in foods and as additives: Uses, exposure, and controversy.
Del Olmo A, Calzada J, Nuñez M
Critical reviews in food science and nutrition, 2017
Benzoic acid and its derivatives as naturally occurring compounds in foods and as additives: Uses, exposure, and controversy.
Del Olmo A, Calzada J, Nuñez M
Critical reviews in food science and nutrition, 2017
Benzoic acid and its derivatives as naturally occurring compounds in foods and as additives: Uses, exposure, and controversy.
Del Olmo A, Calzada J, Nuñez M
Critical reviews in food science and nutrition, 2017
4-Hydroxybenzoic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Benzoic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Isopropyl Ester of PVM/MA Copolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Toluidines, their isomers, salts and halogenated and sulfonated derivatives except 4-hydroxy-2-nitro-toluidine and hydroxyethyl-2-nitro-p-toluidine
Health Canada
Health Canada Cosmetic Ingredient Hotlist
Safety Assessment of Benzyl Alcohol, Benzoic Acid and its...
Wilbur Johnson, Wilma F Bergfeld, Donald V Belsito, Ronald A Hill, Curtis D Klaassen, Daniel C Liebler + 5 more
International journal of toxicology, 2017
Safety Assessment of Benzyl Alcohol, Benzoic Acid and its...
Wilbur Johnson, Wilma F Bergfeld, Donald V Belsito, Ronald A Hill, Curtis D Klaassen, Daniel C Liebler + 5 more
International journal of toxicology, 2017
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR