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1'H,4'H-5λ5-spiro[benzo[b]phosphindole-5,2'a-(2,3-dioxa-2a-phospha-cyclopenta[cd]indene)] is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

65654-59-3

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65654-59-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 65654-59-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,6,5 and 4 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 65654-59:
(7*6)+(6*5)+(5*6)+(4*5)+(3*4)+(2*5)+(1*9)=153
153 % 10 = 3
So 65654-59-3 is a valid CAS Registry Number.

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