128897-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128897-52-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,9 and 7 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 128897-52:
(8*1)+(7*2)+(6*8)+(5*8)+(4*9)+(3*7)+(2*5)+(1*2)=179
179 % 10 = 9
So 128897-52-9 is a valid CAS Registry Number.
128897-52-9Relevant articles and documents
α-SUBSTITUIERTE PHOSPHONATE 54. SYNTHESE VON 4-HYDROXYPHENYLMETHAN-BISPHOSPHONSAEURE
Gross, Hans,Ozegowski, Sigrid
, p. 1 - 5 (2007/10/02)
3,5-Di-tert-butyl-4-hydroxyphenylmethane phosphonic acid diethylester (5) and NBS gave the benzylbrominated phosphonate (6), which could be converted with triethylphosphite into the bisphosphonate (4) in high yields.The bisphosphonate (4) with trimethylsi