33555-99-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33555-99-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,5,5 and 5 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 33555-99:
(7*3)+(6*3)+(5*5)+(4*5)+(3*5)+(2*9)+(1*9)=126
126 % 10 = 6
So 33555-99-6 is a valid CAS Registry Number.
33555-99-6Relevant articles and documents
A simple synthesis of 6-phenylpyrano[2,3-c]pyrazol-4(1H)-ones
Becker, Wilfried,Eller, Gernot A.,Holzer, Wolfgang
, p. 2583 - 2589 (2005)
A novel synthesis of substituted 6-phenylpyrano[2,3-c]pyrazol-4(1H)-ones via reaction of various 2-substituted or 2,5-disubstituted 2,4-dihydro-3H- pyrazol-3-ones with phenylpropynoyl chloride using calcium hydroxide in refluxing 1,4-dioxane is described.
