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Tetrasiloxane, 1,1,3,5,7,7-hexaethoxy-1,3,5,7-tetramethyl- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

18603-21-9

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18603-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18603-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,6,0 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 18603-21:
(7*1)+(6*8)+(5*6)+(4*0)+(3*3)+(2*2)+(1*1)=99
99 % 10 = 9
So 18603-21-9 is a valid CAS Registry Number.

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