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53608-28-9

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53608-28-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53608-28-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,6,0 and 8 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 53608-28:
(7*5)+(6*3)+(5*6)+(4*0)+(3*8)+(2*2)+(1*8)=119
119 % 10 = 9
So 53608-28-9 is a valid CAS Registry Number.

53608-28-9Upstream product

53608-28-9Downstream Products

53608-28-9Relevant articles and documents

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Zietz,Spiteller

, p. 585 - 596 (2007/10/15)

Mass spectrometric degradation reactions of steroids with hydroxy groups in positions 12 and 17β depend on the configuration of the C-12 hydroxy group. In compounds with a 12α-hydroxy group, this group and the hydrogen in position 17α is eliminated as H2O. This reaction is followed by loss of a methyl radical. In the isomers with a 12β-hydroxy group this reaction is not possible. Here the loss of carbon 15-17 dominates the production of an ion by loss of two molecules of water. Key ions of mass 97 as well as M-44 and M-74 ions are produced by 17 keto steroids with a hydroxy group in position 12. If the rings A and B are cis-connected less specific degradation reactions are observed.

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