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2-chlorocarbonylmethyl-3-methyl-butiric acid ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21201-85-4

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21201-85-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21201-85-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,0 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21201-85:
(7*2)+(6*1)+(5*2)+(4*0)+(3*1)+(2*8)+(1*5)=54
54 % 10 = 4
So 21201-85-4 is a valid CAS Registry Number.

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