Guaiacol
Guaiacol: A Comprehensive Guide to This Versatile Chemical Compound
Guaiacol is an organic compound with a wide range of industrial and pharmaceutical applications. As a derivative of phenol, this aromatic substance is valued for its distinctive smoky odor and medicinal properties.
Product Specifications
- Chemical Name: Guaiacol (2-Methoxyphenol)
- Molecular Formula: C7H8O2
- CAS Number: 90-05-1
- Appearance: Colorless to pale yellow oily liquid
- Odor: Characteristic smoky aroma
- Melting Point: 28-32°C
- Boiling Point: 205°C
- Flash Point: 82°C
- Solubility: Soluble in alcohol, ether, and chloroform; slightly soluble in water
| Grade | Purity | Packaging | Storage |
|---|---|---|---|
| Industrial Grade | ≥98% | 200kg drums | Keep tightly closed in cool, dry place |
| Pharmaceutical Grade | ≥99.5% | 25kg containers | Store under nitrogen atmosphere |
| Reagent Grade | ≥99.9% | 1kg bottles | Protect from light |
Guaiacol Applications
Guaiacol serves multiple purposes across various industries:
- Pharmaceuticals: Used as expectorant in cough medicines
- Food Industry: Flavoring agent for smoked foods
- Fragrance: Component in perfumes and soaps
- Chemical Synthesis: Precursor for vanillin production
Guaiacol Safety Information
| Hazard Class | Risk Phrases | Safety Measures |
|---|---|---|
| Skin Irritant | R22, R38 | Wear protective gloves |
| Eye Irritant | R41 | Use safety goggles |
| Environmental Hazard | R50/53 | Prevent water contamination |
Guaiacol FAQ
Q: What is the primary industrial use of guaiacol?
A: The primary industrial use of guaiacol is as a precursor in the synthesis of vanillin, the main component of vanilla flavoring. Approximately 85% of the world's synthetic vanillin is produced from guaiacol.
Q: Is guaiacol naturally occurring?
A: Yes, guaiacol occurs naturally in wood smoke, creosote, and certain essential oils. It's also present in roasted coffee beans and whisky, contributing to their characteristic flavors.
Q: What precautions should be taken when handling guaiacol?
A: When handling guaiacol, always use appropriate personal protective equipment including gloves, goggles, and lab coats. Work in well-ventilated areas as the vapors can be irritating. Store away from oxidizers and heat sources.
Guaiacol Production Process
The commercial production of guaiacol typically involves:
- Methylation of catechol
- Distillation purification
- Quality control testing
- Packaging under inert atmosphere
Guaiacol Storage Guidelines
- Store in tightly sealed containers
- Keep away from direct sunlight
- Maintain temperature below 30°C
- Separate from strong oxidizers
Guaiacol Regulatory Information
| Region | Regulation |
|---|---|
| USA | FDA 21 CFR 172.515 |
| Europe | EU Flavoring Regulation 1334/2008 |
| Japan | FEMA GRAS 2532 |
Guaiacol FAQ
Q: Can guaiacol be used in organic products?
A: Natural guaiacol derived from plant sources may be permitted in certain organic certifications, but synthetic guaiacol is generally not allowed in certified organic products.
Q: What is the shelf life of guaiacol?
A: When stored properly in original sealed containers away from light and moisture, guaiacol typically has a shelf life of 24 months. Always check for discoloration before use.
Q: How is guaiacol typically transported?
A: Guaiacol is classified as a hazardous material for transport. It's usually shipped in UN-approved containers with proper hazard labeling, via road or sea freight with temperature control when necessary.
Technical Support for Guaiacol
For technical inquiries regarding guaiacol, our experts can provide:
- Analytical test methods
- Compatibility studies
- Formulation assistance
- Regulatory guidance
Guaiacol Market Trends
The global guaiacol market is experiencing steady growth due to:
- Increasing demand for synthetic vanillin
- Expansion of pharmaceutical applications
- Growth in premium food flavors
- New fragrance formulations
Guaiacol FAQ
Q: What are the alternatives to guaiacol in flavor applications?
A: While guaiacol is unique in its flavor profile, alternatives may include other phenolic compounds like eugenol or cresols, though these won't provide identical sensory characteristics.
Q: How is guaiacol typically analyzed for purity?
A: Guaiacol purity is most commonly analyzed using gas chromatography (GC) with flame ionization detection, often achieving accuracy within ±0.1%.
Q: What makes pharmaceutical-grade guaiacol different?
A: Pharmaceutical-grade guaiacol undergoes additional purification steps and meets strict compendial standards (USP/EP) with tighter limits on impurities and heavy metals.