Specifications & Physical Properties
Appearance: yellow powder or crystals
Assay (Content): 98.0 ~ 100.5%
Melting Point: 175 ~ 178℃
Residue on Ignition: ≤ 0.2%
pH of 5% Aqueous Solution: 2.4 ~ 3.5
8-Hydroxyquinoline Sulfate (Oxyquinoline Sulfate, Quinosol)
CAS# 134-31-6
8-Hydroxyquinoline Sulfate is a highly effective antiseptic and systemic fungicide. It is a versatile quinoline derivative known for its exceptional metal-chelating abilities. This pale yellow crystalline powder is widely used as a disinfectant and preservative in various pharmaceutical and agricultural applications, ensuring product stability and microbial control.
What 8-Hydroxyquinoline Sulfate Is
| CAS number | 134-31-6 |
|---|---|
| INCI name | Oxyquinoline Sulfate |
| Synonyms | 8-Quinolinol sulfate, Oxine sulfate, Quinosol, Chinosol, 8-hydroxyquinoline sulphate |
| Molecular formula | (C9H7NO)2·H2SO4 (C18H16N2O6S) |
| Molecular weight | 388.39 g/mol |
| Solubility | Freely soluble in water |
It is the sulfate salt of 8-hydroxyquinoline (CAS 148-24-3). The free base is only slightly soluble in water; the salt is freely soluble, and that difference is the whole reason the salt exists — it puts the same chelating and antimicrobial chemistry into aqueous systems.
Applications of Oxine sulfate
This product’s dual function as a powerful chelant and broad-spectrum antimicrobial makes it invaluable. Key applications include stabilizing sensitive chemical formulations by binding trace metals, serving as a systemic fungicide in crop protection, and functioning as a non-toxic antiseptic in topical pharmaceutical and cosmetic preparations for microbial control.
Use in Cosmetics — INCI Oxyquinoline Sulfate
For cosmetic formulation the INCI name is Oxyquinoline Sulfate. What it does in an aqueous system is chelate trace metal ions — the ions that would otherwise catalyse the decomposition of hydrogen peroxide — which is why it appears in peroxide-containing hair products as a stabiliser.
It is frequently described as a cosmetic preservative, and for the European market that description is worth checking before you rely on it. Under Regulation (EC) No 1223/2009, oxyquinoline and its sulfate sit among the restricted substances, with the permitted product types and maximum concentrations set out in the Annexes, rather than among the preservatives permitted generally. Those entries are amended from time to time, so confirm the current one for your product type and your market.
We supply the raw material with a certificate of analysis for the lot. We do not certify cosmetic compliance, and no supplier's word substitutes for the current Annex entry.
Packaging
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