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) |
BRN | 1909332 |
Stability: | Stable. Incompatible with strong oxidizing agents, strong bases. |
InChIKey | QQVIHTHCMHWDBS-UHFFFAOYSA-N |
CAS DataBase Reference | 121-91-5(CAS DataBase Reference) |
NIST Chemistry Reference | 1,3-Benzenedicarboxylic acid(121-91-5) |
EPA Substance Registry System | Isophthalic acid (121-91-5) |


Customized according to suctomer requirements
Isophthalic Acid is used as an intermediate for high performance unsaturated polyesters, resins for coatings, high solids paints, gel coats and modifier of polyethylene terephthalate for bottles. It acts as precursors for the fire-resistant material nomex as well as used in the preparation of high-performance polymer polybenzimidazole. It is also employed as an input for the production of insulation materials.


Our company mainly deals in TDl 80/20,polyether (POP), andpolyetherpolyols.We have established good and stable cooperativerelations withwell-known domestic factories such as Dahua,Yinguang, and Covestro. Wehave first-class products and high-qualityservices, and can provide thelatest market trends and prices. Inrecent years, the company's exportvolume has grown steadily, mainlyexported to the Middle East, Central AsiaEurope, Africa, SouthAmerica, North America and other places, and the keyindustriesserved include the automotive, construction and electronicsindustriesas well as the furniture, sports and textile industries




Our company was established in 2011.More than 10 years, we always treat customers with a sincere attitude and reward customers with good products. We won the trust of multinational customers around the world.
24 hours service
No matter what country you are in, as long as you need us, our staff will be ready to serve you anytime.
High quality service
We can provide customized label/logo/packing service.We also provide friendly communication and good after sales service.
Q:Which kind of payment term do you accept?
A:T/T and L/C.Other payment terms are flexible to be further discussed.
Q:Will you provide data information before purchase?
A:Yes.MSDS,TDS and COA will be provided.
Q:What's your MOQ?
A:Our MOQ is 20tons.
Q:How long is the delivery time?
A:Our delivery time is usually 10-15 days.
Q:How can I get the price?
A:We usually quote within 24 hours after we get your inquiry.
Q:Which kind of payment term do you accept?
A:T/T and L/C at sight. Other payment terms are flexible to be further discussed.
Q:Will you provide data information before purchase?
A:Yes.MSDS,TDS and COA will be provided.
Q:What's your MOQ?
A:Our MOQ is 20tons.
Q:How long is the delivery time?
A:Our delivery time is usually 7-15 days for small quantity, and about 25 days for large quantity.
Q:How do you make our business long-term and good relationship?
A:We keep good quality and competitive price to ensure our customers benefit.