57283-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57283-21-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,2,8 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57283-21:
(7*5)+(6*7)+(5*2)+(4*8)+(3*3)+(2*2)+(1*1)=133
133 % 10 = 3
So 57283-21-3 is a valid CAS Registry Number.
57283-21-3Relevant articles and documents
Lithium hexafluorophosphate-catalyzed efficient tetrahydropyranylation of tertiary alcohols under mild reaction conditions
Hamada, Nao,Sato, Tsuneo
, p. 1802 - 1804 (2004)
Lithium hexafluorophosphate is found to be an efficient catalyst for the tetrahydropyranylation of tertiary alcohols with dihydropyran under mild reaction conditions.