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Phthalic acid is used as an active ingredient in polyesters and alkyd resins. It is also used as plasticizers for polyvinyl chloride and other polymers. It is also useful in the production of anthraquinone, phenolphthalein and phthalocyanine pigments. It serves as an organic reagent in the production of phthalates. It is used to prepare 1,3-cyclohexadiene by reduction using sodium amalgam.
La Nasa, J.; Degano, I.; Modugno, F.; Colombini, M. P. Industrial alkyd resins: characterization of pentaerythritol and phthalic acid esters using integrated mass spectrometry. Rapid Commun. Mass Spectrom. 2015, 29 (3), 225-237.
Tummanapelli, A. K.; Vasudevan, S. Estimating successive p K a values of polyprotic acids from ab initio molecular dynamics using metadynamics: the dissociation of phthalic acid and its isomers. Phys. Chem. Chem. Phys. 2015, 17 (9), 6383-6388.
Hazard Statements: H315-H318-H335
Causes skin irritation. Causes serious eye damage. May cause respiratory irritation.
Precautionary Statements: P264b-P271-P280-P302+P352-P304+P340-P305+P351+P338-P310-P312-P332+P313-P362-P501c
Wash face, hands and any exposed skin thoroughly after handling Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN: Wash with plenty of soap and water. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. Call a POISON CENTER or doctor/physician if you feel unwell. If skin irritation occurs: Get medical advice/attention. Take off contaminated clothing and wash before reuse. Dispose of contents/ container to an approved waste disposal plant