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2055-26-7

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2055-26-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2055-26-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,5 and 5 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 2055-26:
(6*2)+(5*0)+(4*5)+(3*5)+(2*2)+(1*6)=57
57 % 10 = 7
So 2055-26-7 is a valid CAS Registry Number.

2055-26-7Relevant articles and documents

Determination of Nicotine N-Oxide by Gas Chromatography following Thermal Conversion to 2-Methyl-6-(3-pyridyl)tetrahydro-1,2-oxazine

Jacob, Peyton,Benowitz, Neal L.,Yu, Lisa,Shulgin, Alexander T.

, p. 2218 - 2221 (1986)

Nicotine N-oxide is extracted from urine by use of silica gel columns and eluted with methanolic ammonia.The eluate is evaporated and then heated at 150-160 deg C in anisole, which results in conversion to the ring-expansion product 2-methyl-6-(3-pyridyl)tetrahydro-1,2-oxazine.The oxazine derivative is readily extracted from aqueous solution with organic solvents and has good chromatographic properties.A method for determination of nicotine N-oxide in smoker's urine, using 5-methylnicotine N-oxide as an internal standard, is described.

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