133440-67-2 Usage
Uses
Used in Aerospace Industry:
4-(5-Amino-6-hydroxybenzoxazol-2-yl)benzoic acid homopolymer is used as a heat-resistant material for its high thermal stability and flame retardant properties, which are crucial for aerospace applications where materials are exposed to extreme temperatures and harsh environments.
Used in Electronics Industry:
In the electronics industry, 4-(5-Amino-6-hydroxybenzoxazol-2-yl)benzoic acid homopolymer serves as a component in electronic devices due to its thermal stability and resistance to chemical agents, ensuring the longevity and reliability of electronic components.
Used in Automotive Industry:
4-(5-Amino-6-hydroxybenzoxazol-2-yl)benzoic acid homopolymer is utilized as a material in automotive applications for its heat resistance and flame retardant properties, contributing to the safety and durability of vehicles, especially in high-temperature operating conditions.
Used for Further Modification:
The functional groups present in 4-(5-Amino-6-hydroxybenzoxazol-2-yl)benzoic acid homopolymer allow for further chemical modification, enabling the tailoring of its properties for specific applications across various industries, enhancing its versatility and performance.
Check Digit Verification of cas no
The CAS Registry Mumber 133440-67-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,4,4 and 0 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 133440-67:
(8*1)+(7*3)+(6*3)+(5*4)+(4*4)+(3*0)+(2*6)+(1*7)=102
102 % 10 = 2
So 133440-67-2 is a valid CAS Registry Number.
133440-67-2Relevant academic research and scientific papers
4-(5-Amino-6-Hydroxybenzoxazol-2-YL) Ammonium Benzoate and Preparation Method and Use Thereof
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Paragraph 0081; 0082, (2015/09/23)
Disclosed in the present invention are 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate shown in formula (I) and the preparation method and use thereof. The preparation method comprises: fully reacting 4-(5-amino-6-hydroxybenzoxazol-2-yl)benzoic acid shown in formula (II) or 4-(5-amino-6-hydroxybenzoxazol-2-yl)carboxamide benzoate, as a raw material, with ammonia in an aqueous solvent, and directly heating the obtained reaction liquid to remove excess ammonia, so as to obtain 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate. The mass of the 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate (ABAA) prepared in the present invention can reach a polymer grade (where the purity is above 99.5%, the content of metal ions is below 200 ppm, and containing no DMF polymerization inhibition impurities), and the 4-(5-amino-6-hydroxybenzoxazol-2-yl)ammonium benzoate can be used as an AB type monomer for preparing PBO and modified PBO fibres, the resulting PBO having an intrinsic viscosity n of up to 38/dl/g, and the method has such features as ABAA being highly soluble in PPA, a fast polymerization speed, a short time of 2-4 h, a low temperature of 150° C., a high molecular weight of the polymer, fibres of excellent tensile property, being easy to industrialize, etc.
