38373-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 38373-81-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,3,7 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 38373-81:
(7*3)+(6*8)+(5*3)+(4*7)+(3*3)+(2*8)+(1*1)=138
138 % 10 = 8
So 38373-81-8 is a valid CAS Registry Number.
38373-81-8Relevant articles and documents
A Modified Synthesis of 4-Chromanones
Cox, Brian,Waigh, Roger D.
, p. 709 - 710 (2007/10/02)
Problems in the synthesis of 4-chromanones by condensation of 2-hydroxyacetophenones with formaldehyde can be avoided by the isolation of the Mannich base hydrochlorides and cyclization by titration with potassium hydroxide.