What is 2-Ethoxyphenol CAS 94-71-3?

2-Ethoxyphenol is an ortho-substituted aromatic ether derived from catechol, with the molecular formula C8H10O2 and molecular weight 138.16 g/mol. It is also known as guaethol, pyrocatechol monoethyl ether, or o-ethoxyphenol, and appears as a colorless to light yellow liquid or low-melting crystalline mass.

Why is 2-Ethoxyphenol used to make ethyl vanillin instead of guaiacol?

The ethoxy group of 2-Ethoxyphenol is retained in the final ethyl vanillin molecule, so it is structurally required for that flavor product. Guaiacol is the corresponding methoxy starting material and would lead to standard vanillin, not ethyl vanillin.

Is 2-Ethoxyphenol supplied as a liquid or a solid?

Its melting point is near room temperature, so the material can be liquid, crystalline, or a mixture depending on ambient conditions. This product is typically supplied in 200 kg drums or ISO tanks, and normal phase changes do not affect its suitability as a synthesis intermediate.

What purity and impurity controls matter for this grade?

The product is specified at 99.0% minimum by GC with moisture content not more than 0.2%. For ethyl vanillin and fine-chemical synthesis, residual catechol and oxidation byproducts are also important because they can affect downstream reaction selectivity and aromatic quality.

2-Ethoxyphenol CAS 94-71-3

2-Ethoxyphenol, also called guaethol or pyrocatechol monoethyl ether, CAS 94-71-3, is an ortho-substituted aromatic ether supplied as an intermediate for ethyl vanillin and catechol-derived fine chemicals. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 94-71-3
Synonyms: Guaethol, Pyrocatechol monoethyl ether, Catechol monoethyl ether, o-Ethoxyphenol, 2-Ethoxyphenol liquid
Einecs: 202-358-5
Molecular Formula: C₈H₁₀O₂
Grade: Industrial Grade / Pharmaceutical Grade
Package: 200kg/drum or ISO tank

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Product Description

2-Ethoxyphenol CAS 94-71-3 is an ortho-substituted aromatic ether derived from catechol, with the formula C₈H₁₀O₂ and EINECS 202-358-5.

Synonyms: Guaethol; Pyrocatechol monoethyl ether; Catechol monoethyl ether; o-Ethoxyphenol; 2-Ethoxyphenol liquid.

CAS: 94-71-3.

Molecular formula: C₈H₁₀O₂.

It appears as a colorless to light yellow liquid or a low-melting crystalline mass.

Its melting point is near room temperature, so it can be liquid, crystalline or a mixture depending on ambient conditions.

The ethoxy group of 2-ethoxyphenol is retained in the final ethyl vanillin molecule, so it is structurally required for that flavor product.

It is primarily used as an intermediate for ethyl vanillin in the fragrance and flavor industry.

It also serves as a precursor for catechol-derived pharmaceutical APIs, specialized agrochemicals, and antioxidant or stabilizer formulations for polymers and rubber.

The product is specified at 99.0% minimum by GC, with moisture content not more than 0.2%.

The freezing point is about 26.0-29.0 °C, and the boiling point is about 216-217 °C.

Residual catechol and oxidation byproducts are important because they can affect downstream reaction selectivity and aromatic quality.

Store in a cool, dry, well-ventilated area away from direct sunlight, with drums tightly sealed to prevent oxidation and moisture contamination.

Protect from moisture and light, and keep containers closed when not in use.

Confirm appearance, assay, freezing point, moisture, refractive index and grade as required.

Use suitable eye and skin protection during handling, and wash skin contact with soap and water.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is 2-Ethoxyphenol CAS 94-71-3?

A: 2-Ethoxyphenol is an ortho-substituted aromatic ether derived from catechol, with the molecular formula C8H10O2 and molecular weight 138.16 g/mol. It is also known as guaethol, pyrocatechol monoethyl ether, or o-ethoxyphenol, and appears as a colorless to light yellow liquid or low-melting crystalline mass.
Q:
Why is 2-Ethoxyphenol used to make ethyl vanillin instead of guaiacol?

A: The ethoxy group of 2-Ethoxyphenol is retained in the final ethyl vanillin molecule, so it is structurally required for that flavor product. Guaiacol is the corresponding methoxy starting material and would lead to standard vanillin, not ethyl vanillin.
Q:
Is 2-Ethoxyphenol supplied as a liquid or a solid?

A: Its melting point is near room temperature, so the material can be liquid, crystalline, or a mixture depending on ambient conditions. This product is typically supplied in 200 kg drums or ISO tanks, and normal phase changes do not affect its suitability as a synthesis intermediate.
Q:
What purity and impurity controls matter for this grade?

A: The product is specified at 99.0% minimum by GC with moisture content not more than 0.2%. For ethyl vanillin and fine-chemical synthesis, residual catechol and oxidation byproducts are also important because they can affect downstream reaction selectivity and aromatic quality.
Q:
What are the main industrial applications of 2-Ethoxyphenol CAS 94-71-3?

A: It is primarily used as an intermediate for ethyl vanillin in the fragrance and flavor industry. It also serves as a precursor for catechol-derived pharmaceutical APIs, specialized agrochemicals, and antioxidant or stabilizer formulations for polymers and rubber.

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