What is P-Terphenyl?

 

Basic Information

Chinese name: terphenyl
Product Name: p-Terophenyl
Chinese Name 2:1,4 - diphenylbenzene 4 - phenyl biphenyl, right diphenylbenzene
Name 2:1,4-Terphenyl ,4-Phenyl bisphenyl, Diphenyl benzene
Molecular formula: C18H14
Molecular Weight: 230.30 [1]
CAS No. :92 -94-4
HS Code HS NO. 29029090
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Production method

Now terphenyl production in two ways:
(A) by the biphenyl nitration, reduction, acetylation, obtained acetaminophen biphenyls, and then with dinitrogen trioxide role in N-nitroso acetaminophen biphenyls, and then with benzene derived role. In this way the length of routes, operating cumbersome, complex, and the yield is low (only 8%), high cost and low quality of products and equipment corrosion serious.
(2) derived from the associated multi-benzene separation. By-product in the production of biphenyl, diphenyl contain benzene, o-diphenyl benzene, diphenyl benzene room, among other associated Triphenylbenzene and more benzene. Depending on their melting point, boiling point, and solubility, taking sublimation, washing method can be obtained. Major domestic manufacturers in Jiangsu Chemical Co., Ltd. is able to use this method to produce Dano DYNOVA terphenyl.
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Physical and chemical properties

APPEARANCE: White crystal
Flash point / ℃: 207
Boiling point / ℃: 389
Relative density (water = 1): 1.23
Melting point / ℃ :211-213
Relative vapor density (air = 1): 7.95
Solubility: soluble in hot benzene, slightly soluble in ether and carbon disulfide, very slightly soluble in ethanol and acetic acid. Insoluble in water.
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Safety and environmental protection

Terphenyl basic sound of water bodies, is a flammable solid, the human eye, skin, and respiratory tract irritation.
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Use

Terphenyl scintillator is mainly used for the production of plastic sheet, or the preparation of biphenyl liquid crystal material is one of the basic intermediates, as well as synthetic antifungal cyclic peptide (4 - carboxy-terphenyl CTP) of the basic raw material. Can also be prepared 4,4 - dicarboxy-p-terphenyl (DCTP), which is a polyamide prepared biphenyls main raw material.

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