Ethoxyquin
Ethoxyquin (CAS: 91-53-2, C14H19NO) is a quinoline derivative with a molecular weight of 217.31 g/mol. It functions as an antioxidant and preservative. Ethoxyquin is primarily utilised in the chemical synthesis sector, particularly for applications involving heterocyclic building blocks and larger organic molecules.
- IUPAC
- 1,2-Dihydro-6-ethoxy-2,2,4-trimethylquinoline,6-Ethoxy-1,2-dihydro-2,2,4-trimethylquinoline

Antioxidant
Ethoxyquin functions as an effective antioxidant, helping to prevent degradation and preserve the integrity of various chemical formulations.
Chemical Synthesis Intermediate
Its quinoline structure makes it a valuable building block in the synthesis of more complex organic molecules within the chemical industry.
Preservative
This compound can act as a preservative, extending the shelf-life and maintaining the quality of certain chemical products.
| Molecular weight | 217.31 |
|---|---|
| Empirical formula | C14H19NO |
| Assay | ≥75% (capillary GC) |
| Density | 1.03 g/mL at 20 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
| Safety statements (S) | 24 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Ethoxyquin (CAS 91-53-2) used for?
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Ethoxyquin is primarily used as an antioxidant and preservative, and serves as a building block in chemical synthesis, particularly for heterocyclic compounds.
What is the CAS number and molecular formula for Ethoxyquin?
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The CAS number for Ethoxyquin is 91-53-2, and its molecular formula is C14H19NO.
What grade and purity does Tech Serve Solutions supply for Ethoxyquin?
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Tech Serve Solutions supplies Ethoxyquin with an assay of ≥75% (capillary GC). We do not represent this product as USP, BP, or EP grade.
How should Ethoxyquin be handled safely?
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Ethoxyquin is classified as harmful if swallowed (H302). When handling, appropriate personal protective equipment including eyeshields, face shields, and suitable gloves should be worn. Ensure adequate ventilation or use a respirator.
Is Ethoxyquin a controlled substance?
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The provided data does not indicate that Ethoxyquin is a controlled substance.
How is Ethoxyquin packed and exported?
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Tech Serve Solutions is a global supplier and exporter of fine chemicals and laboratory reagents, offering Ethoxyquin in packaging suitable for international shipment.
How can I request a sample or quote for Ethoxyquin?
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Please contact our sales team via the website or direct inquiry to request a sample or a quotation for Ethoxyquin.
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