PRODUCT DATA SHEET (TDS)
1. Product Identification
| Item | Details |
| Product Name | Isophthalic Acid (IPA) |
| Chemical Formula | C₈H₆O₄ |
| Molecular Weight | 166.13 g/mol |
| CAS No. | 121-91-5 |
| Appearance | White powder |
2. Typical Specifications (Premium Grade)
| Analysis Item | Standard Specification | Test Result (Reference) |
| Purity (wt%) | ≥ 99.90 | > 99.9 |
| 3-Carboxybenzaldehyde (3-CBA, mg/kg) | ≤ 25 | 4.5 |
| MT Acid (mg/kg) | ≤ 150 | 44 |
| Acid Value (mg KOH/g) | 675 ± 2 | 675.5 |
| Moisture Content (%) | ≤ 0.1 | 0.06 |
| Color (APHA) | ≤ 10 | 2.5 |
| Ash Content (mg/kg) | ≤ 15 | 1.6 |
| Total Metals (Mo, Cr, Ni, Co, Mn, Ti, Fe, mg/kg) | ≤ 6 (individual ≤ 1) | 0.63 |
| b-Value | ≤ 1.5 | 1.26 |
| Grade | Premium | Premium |
3. Physical & Chemical Properties
| Item | Details |
| Melting Point | ~345–348 °C (sublimes at high temperature) |
| Solubility | Slightly soluble in water; soluble in alcohol, ether, and hot organic solvents |
| Density | ~1.53 g/cm³ |
| Stability | Stable under normal conditions; non-hygroscopic |
4. Applications
- Main raw material for unsaturated polyester resins (UPR), PET copolymerization, and polyamide modification
- Used in the production of high-performance coatings, adhesives, and plasticizers
- Applied in the synthesis of specialty polyesters for bottles, films, and engineering plastics
5. Packaging
- Packaging Type: 25 kg or 1000kg PP/PE woven bags with inner liner; bulk truck/rail delivery available
- Handling Notes: Keep packages sealed and dry; avoid direct contact with moisture
6. Storage
- Store in a dry, cool, and well-ventilated warehouse
- Keep away from heat sources and incompatible materials (strong acids, strong bases, oxidizers)
- Shelf Life: 24 months under proper storage conditions
7. Safety & Handling
- Hazard Classification: Non-hazardous for transport; mild irritant to skin, eyes, and respiratory tract
- Recommended PPE: Safety goggles, gloves, and dust masks when handling
- Work in a well-ventilated area to avoid dust inhalation
- For complete safety instructions, refer to the product SDS (Safety Data Sheet)
8. Test Methods
- Purity: HPLC / Titration
- 3-CBA / MT Acid: HPLC
- Acid Value: GB/T 1612.2 or equivalent
- Moisture: Karl Fischer Titration
- Color (APHA): Visual colorimetry
- Ash Content: Gravimetric method
- Metals: ICP-MS / ICP-OES
- b-Value: Colorimeter measurement
