25665-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25665-54-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,6 and 5 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 25665-54:
(7*2)+(6*5)+(5*6)+(4*6)+(3*5)+(2*5)+(1*4)=127
127 % 10 = 7
So 25665-54-7 is a valid CAS Registry Number.
25665-54-7Relevant articles and documents
Wittig reactions in the presence of silica gel
Patil, Vijay J.,Maevers, Ursula
, p. 1281 - 1284 (2007/10/03)
Wittig reactions, of stable phosphorous ylids, when carried out in presence of silica gel, in hexane, provide a fast, efficient and simple method to obtain α:β unsaturated compounds in high yields and high purity.
