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{tetra-p-tolylporphyrin iron(III)}2(2,3-dichloro-5,6-dicyano-para-benzoquinone) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128471-81-8

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128471-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128471-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,4,7 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128471-81:
(8*1)+(7*2)+(6*8)+(5*4)+(4*7)+(3*1)+(2*8)+(1*1)=138
138 % 10 = 8
So 128471-81-8 is a valid CAS Registry Number.

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