67697-68-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67697-68-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,6,9 and 7 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 67697-68:
(7*6)+(6*7)+(5*6)+(4*9)+(3*7)+(2*6)+(1*8)=191
191 % 10 = 1
So 67697-68-1 is a valid CAS Registry Number.
67697-68-1Relevant articles and documents
3-(Pyrrolo and 3-indolyl)-3-diphenylamino substituted phthalides
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, (2008/06/13)
3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)benzoic acids with diphenylamines.