Oxyquinoline Sulfate

AKA “8-Hydroxyquinoline sulfate, Hydroxyquinoline sulfate, Oxine sulfate, oxyquinoline sulphate, 8-Quinolinol sulfate (2:1) (salt), DTXSID6025436, 61VUG75Y3P, DTXCID605436, CRIPTONOL”

Ingredient

Ingredient Facts

Oxyquinoline sulfate

AKA: 8-Hydroxyquinoline sulfate, Hydroxyquinoline sulfate, Oxine sulfate, Oxyquinoline sulphate, 8-Quinolinol sulfate (2:1) (salt), DTXSID6025436, 61VUG75Y3P, DTXCID605436, CRIPTONOL

Ingredient · Antimicrobial · EWG: 6

Synthetic

Preservative

Chelating Agent

Not Clean

bis(8-Hydroxyquinolinium) sulphate

Solubility greater than or equal to 100 mg/mL at 66 °F (NTP, 1992)

Formula

C18H16N2O6S

Mol. Weight

388.40

CAS #

134-31-6

Form

Powder

State

8-hydroxyquinoline sulfate is a pale yellow to yellow crystalline powder with a slight saffron odor. Burning taste. (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

The sulfate salt form of oxyquinoline was developed as a more stable antimicrobial preservative for cosmetics. It has been used since the early-to-mid 20th century as a preservative and anti-fungal agent.

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

EWG

CIR

Insufficient data

Pregnancy

CIR Safety Findings

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.