13443-90-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 13443-90-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,4,4 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 13443-90:
(7*1)+(6*3)+(5*4)+(4*4)+(3*3)+(2*9)+(1*0)=88
88 % 10 = 8
So 13443-90-8 is a valid CAS Registry Number.
13443-90-8Relevant articles and documents
A heterocyclic azo dye preparation method
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Paragraph 0024, (2017/09/26)
The invention relates to the field of heterocyclic azo dyes, and specifically relates to a preparation method of a heterocyclic azo dye. The preparation method comprises the following steps: carrying out diazo-reaction between 2-amino-6-methoxyl benzothia