Coniferyl Alcohol: FAQs for Researchers

Coniferyl alcohol is a key monolignol and phenylpropanoid metabolite that serves as a major biosynthetic precursor to guaiacyl (G) lignin units in vascular plants.

Chemical Name

(E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-en-1-ol

Molecular Formula

C10H12O3

Molecular Weight

180.20 g/mol

CAS Number

458-35-5

Appearance

White to off-white crystalline solid

Primary Biological Role

Monolignol precursor for guaiacyl lignin biosynthesis

Aladdin SKU

C170450

What Is Coniferyl Alcohol and Why Does It Matter?

Coniferyl alcohol is a naturally occurring monolignol belonging to the phenylpropanoid family of plant secondary metabolites. It is biosynthesized via the general phenylpropanoid pathway from phenylalanine through a series of enzymatic hydroxylation, methylation, and reduction steps. As the predominant monolignol in gymnosperms and a major component in angiosperms, coniferyl alcohol is oxidatively polymerized by peroxidases and laccases in the plant cell wall to form guaiacyl (G)-type lignin.

Lignin, which contributes to the structural rigidity and water-transport capacity of vascular tissue, is one of the most abundant biopolymers on Earth. Because coniferyl alcohol is the direct monomeric building block of G-lignin, it is central to research in plant cell wall biology, biomass recalcitrance, lignocellulosic biorefinery, and the study of vascular development. It is also a precursor to other biologically active compounds, including ferulic acid conjugates and various lignans.

Chemical Properties, Solubility, and Stability

Coniferyl alcohol (CAS 458-35-5; MW 180.20 g/mol; molecular formula C₁₀H₁₂O₃) presents as a white to off-white crystalline solid at room temperature. Its structure features a guaiacyl (4-hydroxy-3-methoxyphenyl) aromatic ring attached to a propenol side chain in the trans (E) configuration.

Solubility: Coniferyl alcohol is sparingly soluble in water but dissolves readily in polar organic solvents including ethanol, methanol, dimethyl sulfoxide (DMSO), and ethyl acetate. For aqueous assay systems, it is recommended to prepare a concentrated stock solution in ethanol or DMSO first, then dilute into the aqueous buffer; the final organic solvent concentration should be kept to ≤1% (v/v) to avoid interference with enzymatic assays.

Stability: Coniferyl alcohol is sensitive to oxidation due to its phenolic hydroxyl group and conjugated double bond. Exposure to air, light, and elevated temperatures can lead to yellowing and polymerization artifacts. Solutions should be prepared fresh or stored under inert gas (nitrogen or argon) in amber vials. The solid form should be stored at 2–8 °C, protected from light and moisture.

Common Laboratory Applications

Coniferyl alcohol is employed across a broad range of biochemical and molecular plant biology applications:

• Lignin polymerization assays: Used as a substrate for in vitro peroxidase and laccase activity assays, enabling kinetic characterization of these oxidative enzymes and studies of dehydrogenation polymer (DHP) formation.
• Cell wall research: Applied to probe monolignol transport, cell wall incorporation mechanisms, and lignin composition in isolated cell wall preparations.
• Metabolic flux studies: Isotopically labeled analogs (not included in this product listing) are used in tracer experiments; unlabeled coniferyl alcohol serves as a reference standard or competitive substrate.
• Lignan biosynthesis research: Serves as a precursor in studies of dirigent protein-mediated stereoselective coupling, which produces lignans such as pinoresinol.
• Analytical reference standard: Used in HPLC, LC-MS, and NMR characterization of lignocellulosic hydrolysates and fermentation streams in biorefinery research.
• Antioxidant and bioactivity studies: Investigated for its radical-scavenging properties and potential cytotoxic or cytoprotective effects in cell-based models.

Handling, Storage, and Safety Considerations

Storage: Store the solid reagent at 2–8 °C in a tightly sealed container, protected from light, moisture, and oxidizing agents. Under recommended storage conditions, the product is expected to remain stable for at least 24 months from the date of manufacture; consult the Certificate of Analysis (CoA) for the specific expiry date on each lot.

Handling: Use appropriate personal protective equipment (PPE) including nitrile gloves, laboratory coat, and safety glasses when handling coniferyl alcohol. Work in a well-ventilated area or fume hood. Avoid generating dust when weighing the powder. As with all phenolic compounds, treat as a potential irritant to skin, eyes, and mucous membranes.

Disposal: Dispose of coniferyl alcohol and its solutions in accordance with local regulations for chemical waste. Do not pour down the drain without confirmation that local discharge limits permit it.

SDS: Always consult the current Safety Data Sheet (SDS) provided with the product or downloadable from the Aladdin Scientific website before use.

Ordering and Quality Information

Coniferyl alcohol is available from Aladdin Scientific under SKU C170450. Each lot is accompanied by a Certificate of Analysis (CoA) that documents purity (typically assessed by HPLC), appearance, and other quality parameters. Researchers requiring specific purity grades, custom pack sizes, or bulk quantities are encouraged to contact Aladdin Scientific's technical sales team for tailored quotations.

When ordering, confirm the required quantity and purity specification. For sensitive applications such as enzymatic kinetics or NMR reference standards, request the CoA in advance to verify that the lot meets your experimental requirements. Aladdin Scientific's reagents are subject to rigorous quality control to ensure reproducibility across lots.

Frequently asked questions

What is coniferyl alcohol used for in research?

Coniferyl alcohol is primarily used as a substrate for in vitro lignin polymerization studies, as a reference standard in analytical chemistry, and as a starting material for investigating monolignol metabolism, lignan biosynthesis, and phenylpropanoid pathway enzymology. It is also employed in cell wall biology and lignocellulosic biorefinery research.

How should I dissolve coniferyl alcohol for aqueous assays?

Coniferyl alcohol is sparingly soluble in water. The recommended approach is to prepare a concentrated stock solution in ethanol or DMSO, then dilute into aqueous buffer just before use. Keep the final organic solvent content at or below 1% (v/v) to minimize interference with enzymatic or cell-based assays. Avoid prolonged storage of aqueous solutions, as oxidation can occur rapidly.

What are the recommended storage conditions for coniferyl alcohol?

Store coniferyl alcohol as a solid at 2–8 °C in a tightly sealed, light-protected container away from moisture and oxidizing agents. Solutions should be stored under inert gas (nitrogen or argon) in amber vials and used as soon as possible. Always check the lot-specific Certificate of Analysis for the confirmed expiry date.

Is coniferyl alcohol the same as sinapyl alcohol or p-coumaryl alcohol?

No. These are three distinct monolignols that differ in the degree of methoxylation of their aromatic ring. Coniferyl alcohol carries one methoxy group and gives rise to guaiacyl (G) lignin units. Sinapyl alcohol carries two methoxy groups and yields syringyl (S) units, while p-coumaryl alcohol has no methoxy group and produces hydroxyphenyl (H) units. All three are phenylpropanoid pathway products but have different structural and reactivity profiles.

Can coniferyl alcohol be used as an antioxidant in biological studies?

Coniferyl alcohol has been investigated for radical-scavenging and antioxidant properties in various in vitro models due to its phenolic hydroxyl group. However, researchers should note that its propensity for oxidative polymerization may complicate interpretation of antioxidant assays, and appropriate controls are essential. Consult primary literature for validated protocols before designing antioxidant experiments.

What purity grade is Aladdin Scientific's coniferyl alcohol (C170450) and how is it verified?

Purity specifications for Aladdin Scientific's coniferyl alcohol (SKU C170450) are documented on the lot-specific Certificate of Analysis (CoA), typically assessed by HPLC. Customers are advised to request or download the CoA from the Aladdin Scientific website prior to use to confirm that the specific lot meets their application requirements.

References

1. Boerjan W, Ralph J, Baucher M. Lignin biosynthesis. Annual Review of Plant Biology. 2003;54:519–546. doi:10.1146/annurev.arplant.54.031902.134938
2. Ralph J, Lundquist K, Brunow G, et al. Lignins: natural polymers from oxidative coupling of 4-hydroxyphenylpropanoids. Phytochemistry Reviews. 2004;3(1–2):29–60. doi:10.1023/B:PHYT.0000047809.65444.a4
3. Davin LB, Lewis NG. Dirigent proteins and dirigent sites explain the mystery of specificity of radical precursor coupling in lignan and lignin biosynthesis. Plant Physiology. 2000;123(2):453–461. doi:10.1104/pp.123.2.453
4. Vanholme R, Demedts B, Morreel K, Ralph J, Boerjan W. Lignin biosynthesis and structure. Plant Physiology. 2010;153(3):895–905. doi:10.1104/pp.110.155119

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