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650-09-9

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650-09-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 650-09-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,5 and 0 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 650-09:
(5*6)+(4*5)+(3*0)+(2*0)+(1*9)=59
59 % 10 = 9
So 650-09-9 is a valid CAS Registry Number.

650-09-9Relevant articles and documents

A NEW EFFICIENT SYNTHESIS OF TRIFLUOROACETYL HALIDES AND MIXED ANHYDRIDES OF PHOSPHORUS AND TRIFLUOROACETIC ACIDS

Helinski, J.,Skrzypczynski, Z.,Wasiak, J.,Michalski, J.

, p. 225 - 226 (2007/10/02)

Reaction of trifluoroacetic anhydride with chloroanhydrides of phosphorus acids R2P(O)Cl results in formation of mixed anhydrides R2P(O)OCOCF3 and trifluoroacetic acid halides CF3COX (X=Cl, Br, I) in quantitative yield.

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