4204-58-4 Usage
Uses
Used in Plastics Industry:
2,2-bis(4-hydroxyphenyl)is used as a key component in the production of polycarbonate plastics, which are known for their durability and transparency. This makes them suitable for use in food and beverage containers, as well as other consumer products.
Used in Epoxy Resin Production:
In the epoxy resin industry, 2,2-bis(4-hydroxyphenyl)is used as a curing agent to harden the resin, providing a strong and stable material. This is particularly useful in applications such as dental fillings and protective coatings.
Used in Thermal Paper Production:
2,2-bis(4-hydroxyphenyl)is used in the production of thermal paper, which is commonly used for receipts. 2,2-bis(4-hydroxyphenyl)helps in the development of the printed image when heat is applied.
Health Concerns and Alternatives:
Due to the potential health risks associated with BPA exposure, there has been an increased interest in finding alternative chemicals to replace it in consumer products. This has led to the development of new materials and compounds that can offer similar properties without the potential health concerns.
Check Digit Verification of cas no
The CAS Registry Mumber 4204-58-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,0 and 4 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4204-58:
(6*4)+(5*2)+(4*0)+(3*4)+(2*5)+(1*8)=64
64 % 10 = 4
So 4204-58-4 is a valid CAS Registry Number.
4204-58-4Relevant academic research and scientific papers
Processes for producing aromatic polycarbonate oligomer and aromatic polycarbonate
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, (2008/06/13)
A process for producing continuously an aromatic polycarbonate oligomer by reacting an aromatic dihydroxy compound and an alkali metal base or an alkaline earth metal base with a carbonyl halide compound comprises: (1) feeding continuously to a tank reactor an aromatic dihydroxy compound, water, a molecular weight controlling agent, a polymerization catalyst, a carbonyl halide compound, and an organic solvent, and an alkali metal base or an alkaline earth metal base in an amount of 1.15-1.6 equivalents based on the aromatic dihydroxy compound, (2) carrying out the reaction with a residence time as defined by the following formula, where X is an amount of the polymerization catalyst in terms of mole % based on the amount of mole of the aromatic dihydroxy compound fed per unit time, and Y is a residence time (min.), and (3) continuously withdrawing the reaction mixture from the tank reactor to obtain an aromatic polycarbonate oligomer having a number average molecular weight of 1,000-10,000. An aromatic polycarbonate is produced by polycondensation of the aromatic polycarbonate oligomer.
