p-Methylbenzoic acid
p-Methylbenzoic acid, also known as 4-methylbenzoic acid, is a white crystalline solid widely used in pharmaceutical, agrochemical, and specialty chemical industries. As a leading manufacturer, we provide high-purity p-Methylbenzoic acid with competitive pricing and reliable supply.
Product Specifications
- Chemical Name: p-Methylbenzoic acid (4-Methylbenzoic acid)
- CAS Number: 99-94-5
- Molecular Formula: C8H8O2
- Molecular Weight: 136.15 g/mol
- Appearance: White crystalline powder
- Purity: ≥99% (GC)
- Melting Point: 180-183°C
- Density: 1.06 g/cm3
- Solubility: Soluble in ethanol, ether; slightly soluble in water
| Parameter | Specification | Test Method |
|---|---|---|
| Assay (GC) | ≥99% | GC-FID |
| Moisture Content | ≤0.5% | Karl Fischer |
| Residue on Ignition | ≤0.1% | Gravimetric |
| Heavy Metals (as Pb) | ≤10 ppm | ICP-OES |
| Related Substances | ≤0.5% | HPLC |
Applications of p-Methylbenzoic Acid
p-Methylbenzoic acid serves as:
- Intermediate in pharmaceutical synthesis
- Precursor for dyes and pigments
- Building block for liquid crystal materials
- Raw material for agrochemicals
- UV absorber in polymer stabilization
Storage and Handling
Store p-Methylbenzoic acid in a cool, dry, well-ventilated area away from oxidizing agents and strong bases. Keep container tightly closed when not in use. Use appropriate personal protective equipment including gloves and eye protection when handling.
FAQs about p-Methylbenzoic Acid
Q: What is the shelf life of p-Methylbenzoic acid?
A: When stored properly in original packaging under recommended conditions, p-Methylbenzoic acid has a minimum shelf life of 24 months from the date of manufacture.
Q: Can p-Methylbenzoic acid be used in food applications?
A: No, our standard grade p-Methylbenzoic acid is not food-grade and not approved for direct food applications. Special food-grade versions would need to be produced under appropriate regulatory compliance.
Q: What is the difference between p-Methylbenzoic acid and benzoic acid?
A: While both are aromatic carboxylic acids, p-Methylbenzoic acid has a methyl group (-CH3) in the para position (position 4) of the benzene ring, which affects its physical properties and chemical reactivity compared to unsubstituted benzoic acid.
Q: Is p-Methylbenzoic acid hazardous?
A: p-Methylbenzoic acid is generally considered low toxicity but may cause mild skin and eye irritation. Always consult the Safety Data Sheet (SDS) and follow proper handling procedures.
Q: What packaging options are available for p-Methylbenzoic acid?
A: We offer p-Methylbenzoic acid in various packaging options including 25kg fiber drums, 1kg aluminum bags, and custom packaging upon request.
Technical Support
Our technical team is available to provide detailed application support for p-Methylbenzoic acid. We can assist with solubility data, compatibility information, and formulation recommendations for your specific requirements.
Regulatory Information
p-Methylbenzoic acid is compliant with REACH regulations and listed on the TSCA inventory. Please contact us for specific regulatory documentation or certificates of analysis.