4238-27-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4238-27-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,3 and 8 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 4238-27:
(6*4)+(5*2)+(4*3)+(3*8)+(2*2)+(1*7)=81
81 % 10 = 1
So 4238-27-1 is a valid CAS Registry Number.
4238-27-1Relevant articles and documents
Efficient dehydration of hydroxyenals and -enones: HfCl4·(THF)2 as an effective catalyst for di-, tri- and tetraene formation
Saito,Nagahara,Yamamoto
, p. 1690 - 1692 (2001)
Polyenes were easily obtained from hydroxy(tri, di)ene-containing carbonyl compounds in good to excellent yields in the presence of catalytic HfCl4·(THF)2.