155683-59-3 Usage
Uses
Δ5(10),6,8(9)-D-(-)-Norgestrel is an impurity of D-(-)-Norgestrel (N689510), an emergency contraceptive.
Check Digit Verification of cas no
The CAS Registry Mumber 155683-59-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,6,8 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 155683-59:
(8*1)+(7*5)+(6*5)+(5*6)+(4*8)+(3*3)+(2*5)+(1*9)=163
163 % 10 = 3
So 155683-59-3 is a valid CAS Registry Number.