4-Hydroxybenzoic acid(99-96-7)
1. Basic Information
1. Chemical Name: p-Hydroxybenzoic Acid
2. Chinese Aliases: 对羟基苯甲酸; 对苯酚甲酸; 对羟基安息香酸; 4-羟基苯甲酸
3. English Name: 4-Hydroxybenzoic Acid
4. Molecular Formula: C7H6O3
5. Molecular Weight: 138.12
6. CAS Number: 99-96-7
7. EINECS Number: 202-804-9
8. Appearance: White crystalline powder
2. Technical Parameters
| Test Item | Standard | Polymer Grade | Industrial Grade |
|-----------|---------|---------------|----------------|
| Appearance | White crystalline powder | White crystalline powder |
| Content | 99.6% Min | 99.0% Min |
| Melting Point | 214-217℃ | 213-216℃ |
| Odor | Odorless | Odorless |
| Solubility | Clear and transparent | Clear and transparent |
| Color (Pt-Co) | 10 Max | 40 Max |
| Loss on Drying | 0.20% Max | 0.50% Max |
| Ash | 0.02% Max | 0.15% Max |
| Sulfate | 0.01% Max | 0.05% Max |
| Chloride | 0.005% Max | 0.02% Max |
| Phenol | 0.01% Max | 0.10% Max |
| Salicylic Acid | 0.02% Max | 0.10% Max |
| 4-Hydroxyisophthalic Acid | 500ppm Max | - |
| Methanol Insoluble Matter | 50ppm Max | - |
| Potassium (K) | 5ppm Max | - |
| Sodium (Na) | 5ppm Max | - |
| Iron (Fe) | 5ppm Max | - |
| Calcium & Magnesium Ions | 10ppm Max | - |
(The above parameters are for reference, please refer to the factory inspection report for specific values.)
3. Packaging Specifications
25 kg bag or cardboard drum