130521-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 130521-17-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,5,2 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 130521-17:
(8*1)+(7*3)+(6*0)+(5*5)+(4*2)+(3*1)+(2*1)+(1*7)=74
74 % 10 = 4
So 130521-17-4 is a valid CAS Registry Number.
130521-17-4Relevant articles and documents
Unequivocal Preparation of 4- and 5-Acyl-2-aminophenols
Aichaoui, Hocine,Lesieur, Isabelle,Henichart, Jean-Pierre
, p. 679 - 680 (1990)
Unequivocal methods for the specific preparation of 4- or 5-acyl-2-aminophenols are reported. 5-Acyl-2-aminophenols are obtained by ring opening with dilute sodium hydroxide of 2(3H)-benzoxazolinones acylated at position 6. 4-Acyl-2-aminophenols are obtai