18207-21-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18207-21-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,2,0 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 18207-21:
(7*1)+(6*8)+(5*2)+(4*0)+(3*7)+(2*2)+(1*1)=91
91 % 10 = 1
So 18207-21-1 is a valid CAS Registry Number.
18207-21-1Relevant articles and documents
INTRODUCTION OF α,β-DOUBLE BOND INTO SATURATED ACETALS BY BROMINATION-DEHYDROBROMINATION
Vasil'ev, A. A.
, p. 876 - 880 (2007/10/02)
The successive bromination and dehydrobromination of the acetals of saturated aldehydes give the corresponding α,β-enals as the main reaction products.The process is complicated by the formation of esters at the first stage and ortho esters at the second as side reactions.
