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51203-08-8

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51203-08-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51203-08-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,2,0 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 51203-08:
(7*5)+(6*1)+(5*2)+(4*0)+(3*3)+(2*0)+(1*8)=68
68 % 10 = 8
So 51203-08-8 is a valid CAS Registry Number.

51203-08-8Relevant articles and documents

A reverse, anti--4, the 4-dicyclohexyl [...] phthalic acid preparation method

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Paragraph 0037, (2017/04/08)

The invention relates to a preparation method of trans,trans-4,4'-dicyclohexyl phthalate. The preparation method comprises the following steps: taking a compound-4-phenyl cyclohexyl alkyl ketone as a raw material, and producing Friedel-Crafts acylation reaction, oxidation reaction, hydrogenation reaction and conversion reaction to obtain trans,trans-4,4'-dicyclohexyl phthalate. According to the method, cheaper raw materials are adopted, trans,trans-4,4'-dicyclohexyl phthalate can be prepared through simple reactions, the cost of trans,trans-4,4'-dicyclohexyl phthalate is low, the operation is easy, and the industrialization production is facilitated.

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