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33281-79-7

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33281-79-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33281-79-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,2,8 and 1 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 33281-79:
(7*3)+(6*3)+(5*2)+(4*8)+(3*1)+(2*7)+(1*9)=107
107 % 10 = 7
So 33281-79-7 is a valid CAS Registry Number.

33281-79-7Relevant articles and documents

Synthesis of Biological Markers in Fossil Fuels. 1. 17α and 17β Isomers of 30-Norhopane and 30-Normoretane

Bauer, Philip E.,Dunlap, Norma K.,Arseniyadis, Simeon,Watt, David S.,Seifert, Wolfgang K.,Moldowan, J. Michael

, p. 4493 - 4497 (1983)

21-Hydroxyhopan-3-one was converted to a mixture of 22,29,30-trinor-17α-hopan-21-one and 30-norhopan-22-one by the following reaction sequence: (1) dehydration with phosphorus oxytrichloride, (2) Wolff-Kishner reduction, and (3) ozonolysis.These two keton

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