4,4'-Thiodiphthalic anhydride (TDPA) - Names and Identifiers
Name | 4,4'-Thiodiphthalic anhydride (TDPA)
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Synonyms | 4,4'-Thiodiphthalic anhydride 4,4'-Bis(phthalic anhydride)sulfide 4,4'-Thiodiphthalic anhydride (TDPA) 1,3-Isobenzofurandione, 5,5'-thiobis- 5,5'-Thiobis(isobenzofuran-1,3-dione)
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CAS | 25884-43-9
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4,4'-Thiodiphthalic anhydride (TDPA) - Physico-chemical Properties
Molecular Formula | C16H6O6S
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Molar Mass | 326.28 |
Density | 1.71±0.1 g/cm3(Predicted) |
Melting Point | 200-202 °C |
Boling Point | 637.9±40.0 °C(Predicted) |
4,4'-Thiodiphthalic anhydride (TDPA) - Introduction
4,4 '-Thiodiphthalic anhydride (TDPA)(TDPA) is an organic compound with the chemical formula C16H10O4S. It is a colorless to pale yellow crystal, soluble in organic solvents such as benzene and methylene chloride.
TDPA has a low melting point and melting point, it can be slowly decomposed at room temperature. It is stable in air, but may explode at high temperatures or when in contact with strong oxidants. It is irritating to the skin, eyes and respiratory system, and should be rinsed with plenty of water immediately after contact.
TDPA is mainly used as an important intermediate for polyimide resins. Polyimide is a high-performance engineering plastic with excellent heat resistance, mechanical properties and electrical properties. TDPA can be reacted with disulfuric anhydride to produce polyimides, which are used to make materials such as fibers, films, coatings, and adhesives.
The preparation method of TDPA is usually through the oxidation of phenol to produce diphenyl sulfide, and then through the acylation reaction to convert it into 4,4 '-Thiodiphthalic anhydride (TDPA). The preparation process requires the use of some organic synthesis reagents and specific reaction conditions, which need to be carried out in a laboratory environment.
Use and handle TDPA with adequate ventilation, wear appropriate personal protective equipment, and avoid contact with skin and inhalation of vapors. In case of accidental contact, emergency measures should be taken immediately and help should be sought from relevant emergency agencies.
Last Update:2024-04-10 22:29:15