Synonyms: 1,4-Benzenedicarboxylic acid, polymer with 1,2-ethanediol, 2,5-furandione, 1,3-isobenzofurandione and 1,2-propanediol;polymer with 1,2-ethanediol, 2,5-furandione, 1,3-4-benzenedicarboxylic acid
The CAS Registry Mumber 31742-81-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,7,4 and 2 respectively; the second part has 2 digits, 8 and 1 respectively. Calculate Digit Verification of CAS Registry Number 31742-81: (7*3)+(6*1)+(5*7)+(4*4)+(3*2)+(2*8)+(1*1)=101 101 % 10 = 1 So 31742-81-1 is a valid CAS Registry Number.
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