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81428-57-1

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81428-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81428-57-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,4,2 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81428-57:
(7*8)+(6*1)+(5*4)+(4*2)+(3*8)+(2*5)+(1*7)=131
131 % 10 = 1
So 81428-57-1 is a valid CAS Registry Number.

81428-57-1Relevant articles and documents

Unexpected Behaviour of 2-Bromoethyl 4-Hydroxybenzoate with Sodium Hydroxide

Nonnenmacher, Alex,Plieninger, Hans

, p. 1244 - 1246 (2007/10/02)

Whereas 2-bromoethyl benzoate hydrolyzes quickly with sodium hydroxide to yield benzoic acid, 2-bromoethyl 4-hydroxybenzoate (1) with equimolar amounts of sodium hydroxide gives quantitatively 2-hydroxyethyl 4-hydroxybenzoate (6).It is proved with deuterated compounds that this reaction proceeds with internal C = O alkylation via the intermediate 5.

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