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1897-47-8

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1897-47-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1897-47-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,9 and 7 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1897-47:
(6*1)+(5*8)+(4*9)+(3*7)+(2*4)+(1*7)=118
118 % 10 = 8
So 1897-47-8 is a valid CAS Registry Number.

1897-47-8Downstream Products

1897-47-8Relevant articles and documents

Preparation method of aromatic dicarboxylic acid derivative

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Paragraph 0025; 0049-0052, (2021/03/11)

The invention provides a preparation method of an aromatic dicarboxylic acid derivative, wherein the preparation method comprises the following steps: step 1, carrying out a coupling reaction on dihalogenated aromatic hydrocarbon and metal cyanide at a temperature of 40-200 DEG C under metal catalysis in a solvent, and carrying out extraction layering concentration to obtain a dicyano compound after the reaction is finished; and step 2, carrying out a hydrolysis reaction on the obtained dicyanogen compound at the temperature of 60-200 DEG C under an acidic condition, and carrying out post-treatment to obtain the final product. According to the preparation method of the aromatic dicarboxylic acid derivative, dihalogenated aromatic hydrocarbon reacts with metal cyanide and then is hydrolyzedunder the acidic condition to obtain aromatic acid or the derivative thereof, and the preparation method has the remarkable advantages that the raw materials are cheap and easy to obtain, operation is easy and convenient, the yield is high, three wastes are easy to dispose, the product quality is high, and the substrate tolerance is good.

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