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80522-18-5

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80522-18-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80522-18-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,5,2 and 2 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 80522-18:
(7*8)+(6*0)+(5*5)+(4*2)+(3*2)+(2*1)+(1*8)=105
105 % 10 = 5
So 80522-18-5 is a valid CAS Registry Number.

80522-18-5Downstream Products

80522-18-5Relevant articles and documents

Novel direct polycondensation of 4-hydroxybenzoic acid by means of reaction-induced crystallization of oligomers under nonstoichiometric condition

Kimura, Kunio,Kohama, Shin-Ichiro,Yamashita, Yuhiko

, p. 5043 - 5046 (2003)

The direct polycondensation of 4-hydroxybenzoic acid (HBA) in the presence of 4-alkyloxybenzoic anhydride by means of the reaction-induced crystallization of oligomers was described. Thermal properties and crystal structure of poly(p-oxybenzoyl) (POB) were examined to support the formation of high molecular weight POB. Thermal properties of the obtained crystals were measured by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).

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