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81667-61-0

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81667-61-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81667-61-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,6 and 7 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81667-61:
(7*8)+(6*1)+(5*6)+(4*6)+(3*7)+(2*6)+(1*1)=150
150 % 10 = 0
So 81667-61-0 is a valid CAS Registry Number.

81667-61-0Downstream Products

81667-61-0Relevant articles and documents

Compounds with Bridgehead Nitrogen. Part 41. The Reaction between trans-2-Aminocycloalkanols and Formaldehyde

Barkworth, Peter M. R.,Crabb, Trevor A.

, p. 91 - 94 (2007/10/02)

trans-2-Aminocyclopentanol and trans-2-aminocyclohexanol condense with formaldehyde to give single isomers of NN'-methanoperhydrocycloalkanodioxadiazecines whereas trans-2-aminocycloheptanol and trans-2-aminocyclo-octanol give 1:1 mixtures of two isomeric bis(perhydrocycloalkano-oxazol-3-yl)methanes.The formation of the two types of dimer is explained in terms of differences in ring fusion strain.

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