Terephthalic Acid / PTA CAS 100-21-0

1. Terephthalic acid is primarily used as a precursor to polyethylene terephthalate (PET), a polymer widely used in fibers, plastic bottles, and films .
2. PTA CAS 100-21-0 is used as a linker molecule in the preparation of metal-organic frameworks (MOFs) and as a monomer for high-performance copolyesters .
3. Terephthalic acid is a commodity chemical, with several million tonnes produced annually, and can be synthesized from bio-based materials for polyester fiber production .

1. Store Terephthalic acid in a tightly sealed container under inert gas at 2-8°C, in a cool, dry place . Keep the container tightly closed .
2. Keep PTA CAS 100-21-0 away from strong oxidizing agents and sources of ignition, as finely dispersed particles form explosive mixtures in air .
3. Handle Terephthalic acid using appropriate personal protective equipment including compatible chemical-resistant gloves (nitrile rubber) and safety goggles, and avoid breathing dust .

1. Isolate PTA CAS 100-21-0 the spill area, wear personal protective equipment including a particulate filter respirator, and avoid dust formation .
2. Sweep up Terephthalic acid using spark-proof tools into sealed, labeled containers for disposal, moistening first to prevent dusting if appropriate . Do not let Terephthalic acid enter drains .
3. Personnel cleaning Terephthalic acid spills must dispose of waste according to environmental regulations ; for firefighting, use water spray, foam, dry chemical, or carbon dioxide .

1. Terephthalic acid is classified with GHS signal word "Danger" or "Warning" , causing skin irritation (H315) and serious eye irritation (H319), and may cause respiratory irritation (H335) .
2. PTA CAS 100-21-0 may cause damage to organs through prolonged or repeated exposure (H372) , but acute toxicity is low with oral LD50 > 15,380 mg/kg in rats . It is suspected of damaging fertility or the unborn child (H361) according to some sources .
3. Terephthalic acid is stable but incompatible with strong oxidizing agents ; it sublimes at 402°C , has a flash point of 260°C , and thermal decomposition produces toxic fumes including carbon oxides .