Terephthalic acid
- Molecular formula: C8H6O4
- CAS NO.: 100-21-0
- EINECS No.: 202-830-0
- Appearance：White needle shaped crystals or powders
Synonyms: p-Phthalic acid, 1,4-Benzenedicarboxylic acid,
Terephthalic acid technical data:
| Item | Premium Grade | First Grade |
| Acid value/(mgKOH/g) | ≤675+/-2 | ≤675+/-2 |
| p-carboxy benzaldehyde /(mg/kg) | ≤25 | ≤25 |
| Ash content/(mg/kg) | ≤8 | ≤15 |
| Total heavy metals (molybdenum,chromlum, nickel, cobalt, mangaese, titanium, iron)/(mg/kg) | ≤5 | ≤10 |
| lron/(mg/kg) | ≤1 | ≤2 |
| moisture content/ | ≤0.2 | ≤0.5 |
| 5g/100m LDMF Chrominance (platinum-cobalt number) | ≤10 | ≤10 |
| p-methylbenzoic acid/(mg/kg) | ≤150 | ≤200 |
Terephthalic acid types: Crude terephthalic acid, terephthalic acid,Grade C, Terephthalic acid (EPTA), Terephthalic acid (MTA), Terephthalic acid (QTA), Medium purity terephthalic acid SKPTA
Application:
lt is an important raw material for manufacturing polyester fibers, films, plastic products, insulation paints, and Plasticizers, and also used as a dye intermediate.