90069-97-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90069-97-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,0,6 and 9 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 90069-97:
(7*9)+(6*0)+(5*0)+(4*6)+(3*9)+(2*9)+(1*7)=139
139 % 10 = 9
So 90069-97-9 is a valid CAS Registry Number.
90069-97-9Relevant articles and documents
Syntheses du diamino-3,4 thiophene et de quelques derives de substitution
Outurquin, Francis,Paulmier, Claude
, p. 153 - 158 (2007/10/02)
3,4-Diaminothiophen has been obtained in a good yield by reduction of 2,5-dibromo-3,4-dinitrothiophen.This orthodiamine is stable and isolable as a crystalline solid.Some derivatives such as diamides and dicarbamates could be prepared from this compound.E