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- Brand：hebei qujie
- Model：25kg/bag
- Purity：≥99%
- Cas：121-91-5
- Createtime： 2026-06-02
- Updatetime： 2026-06-05
| useage | Basic organic acids, PET-modified raw materials, coatings, inks, and other raw materials. |
| deliveryInfo | |
| appearance | Pure white crystalline powder/needle-like solid. |
| aliasen | |
| supplyCapacity | 70T/Month |
| harbor | tianjin qingdao shanghai |
| minorder | 1KG |
Introduction:
lsophthalic acid (IPA), also known as 1,3-benzenedicarboxylic acid or isophthalic acid,
has strong heat resistance, hydrolysis resistance, and chemical resistance. It can undergo
reactions such as salt formation, dehydration, hydrogenation, and halogenation.
Application:
Used as an intermediate for polyester and coating resins. Mixed with terephthalic acid, isophthalic acid is used in the production of PET resins for drink plastic bottles and food packaging. The high performance polymer polybenzimidazole is produced from isophthalic acid. The acid is used as an important input to produce insulation materials.
| Isophthalic acid Chemical Properties | |
| Melting point | 341-343 °C (lit.) |
| Boiling point | 214.32°C (rough estimate) |
| density | 1,54 g/cm3 |
| refractive index | 1.5100 (estimate) |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | 0.12g/l |
| pka | 3.54(at 25oC) |
| form | Crystalline Powder |
| color | White to off-white |
| Water Solubility | 0.01 g/100 mL (25 oC) |
| Stability: | Stable. Incompatible with strong oxidizing agents, strong bases. |
| NIST Chemistry Reference | 1,3-Benzenedicarboxylic acid(121-91-5) |
| EPA Substance Registry System | Isophthalic acid (121-91-5) |
packing:25kg/bag or according to the quantity you want
Delivery Detail: Some of the products can be supplied within 7 days on the strength of warehouse.
Receipt Reminder: Please check the package for intact condition before signing for delivery. Should you encounter missing items, quantity discrepancies or quality issues upon inspection, you may reject the delivery and get in touch with us. We will resolve the matter promptly.
Hebei Qujie Technology Co., Ltd. was established in 2021. It is a private enterprise integrating production, customization, sales, and trade. The company is located at No. 8 Jinhe East Road, Tongye Town, Luquan District, Shijiazhuang City. The factory has an elegant environment, complete equipment, and ample resources. The company possesses advanced technology and professional technical personnel. Since its establishment, the company's sales have steadily increased. The company adheres to the business philosophy of 'quality and price, customer first,' which is effectively reflected in its operations, and is committed to providing customers with sufficient supply and stable and reliable quality.
Business Philosophy: Integrity-based, win-win cooperation
Corporate Spirit: Integrity, gratitude, equality, mutual respect
Corporate Mission: Create opportunities for employees, create value for customers
We strive to meet your demands with the following services:
1.Customized solutions tailored to individual clients
2.Arrangement of third-party product inspections as required
3.Evaluation and mass production based on your counter samples
4.Favorable exclusive discounts for long-term partners
5.Round-the-clock customer support
