139137-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139137-71-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,1,3 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139137-71:
(8*1)+(7*3)+(6*9)+(5*1)+(4*3)+(3*7)+(2*7)+(1*1)=136
136 % 10 = 6
So 139137-71-6 is a valid CAS Registry Number.
139137-71-6Relevant articles and documents
Deep Coloured Systems with Oxalic Acid Substructure - a Structural Correction
Beckert, R.,Bauer, W.
, p. 555 - 559 (2007/10/02)
Basing on a recent spectroscopic investigation the structure of earlier described deeply coloured systems derived from oxalic acid imidochlorides and thioacetamide has to be revised.Due to the poor solubility of these systems their spectroscopic character