Oxyquinoline

Oxyquinoline

AKA “8-HYDROXYQUINOLINE, quinolin-8-ol, 8-quinolinol, Oxine, Quinophenol, Oxychinolin, Phenopyridine, 8-Quinol”

Synthetic

Ingredient Facts

Oxyquinoline

AKA: 8-HYDROXYQUINOLINE, Quinolin-8-ol, 8-quinolinol, Oxine, Quinophenol, Oxychinolin, Phenopyridine, 8-Quinol

Synthetic · Antimicrobial · EWG: 5

Synthetic

Preservative

Chelating Agent

Synthetic

Clean

A naturally-derived preservative that protects products from microbial growth and helps stabilize formulations for longer shelf life.

Solubility less than 1 mg/mL at 61 °F (NTP, 1992)

Formula

C9H7NO

Mol. Weight

145.16

CAS #

148-24-3

Form

Powder

State

8-hydroxyquinoline appears as white to off-white or faintly yellow crystalline powder. Phenolic odor. (NTP, 1992)

See origin →

Functions

Antimicrobial

Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.

Chelating

Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.

Fights Bacteria

Traditional Use

Developed in the early 20th century as an antimicrobial and antifungal synthetic agent. It has been used in cosmetics and topical preparations to preserve products and treat minor skin irritations.

Skin Types

●all-skin-types

Best For

General

Melanin-Rich Skin

Suitable

Pregnancy & Breastfeeding Safe

EWG

CIR

Unsafe

Pregnancy

CIR Safety Findings

medical-approval

all-shades-safe

Concentration Guide

0.3%

0%0%

Reg. Limit

EU regulatory limit: 0.3%. (a) 0.3% (as base) (b) 0.03% (as base) Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 51.