4513-20-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4513-20-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,5,1 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4513-20:
(6*4)+(5*5)+(4*1)+(3*3)+(2*2)+(1*0)=66
66 % 10 = 6
So 4513-20-6 is a valid CAS Registry Number.
4513-20-6Relevant articles and documents
METAL FREE ACID DYES, METHODS FOR THE PRODUCTION THEREOF AND THEIR USE
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Paragraph 0078, (2013/10/08)
The present invention relates to dyes of the formula (I) in which R1 to R10, D1 and D2 are defined as given in claim 1, a process for preparing them, and their use for dyeing and printing hydroxyl- and/or carbox