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21970-90-1

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21970-90-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21970-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,7 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21970-90:
(7*2)+(6*1)+(5*9)+(4*7)+(3*0)+(2*9)+(1*0)=111
111 % 10 = 1
So 21970-90-1 is a valid CAS Registry Number.

21970-90-1Downstream Products

21970-90-1Relevant articles and documents

Identification of chlorzoxazone metabolites in human urine

Twele,Spiteller

, p. 759 - 763 (2007/10/02)

Besides 6-hydroxychlorzoxazon II, the main metabolite of 5-chlorobenzoxazolin-2-one (chlorzoxazone I, Paraflex) two other compounds were found to be metabolites of chlorzoxazone: 5-chloro-2,4-dihydroxyacetanilide XXII is produced from 6-hydroxychlorzoxazone II by ring cleavage and acetylation of the nitrogen. More interesting is the formation of the 6-hydroxybenzoxazolone XX. This compound is formally produced by substitution of Cl for hydrogen and hydroxylation of a neighbour ring-carbon atom.

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