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41140-80-1

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41140-80-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41140-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,1,4 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 41140-80:
(7*4)+(6*1)+(5*1)+(4*4)+(3*0)+(2*8)+(1*0)=71
71 % 10 = 1
So 41140-80-1 is a valid CAS Registry Number.

41140-80-1Relevant articles and documents

Reaction de Friedel et Crafts de derives aromatiques sur le composes dicarbonyles-1,4 ethyleniques-2,3. V.Reactions des hydroxyphtalides et hydroxytetrahydrophtalides

Canevet, Jean-Claude,Guilloton, Odette

, p. 96 - 98 (2007/10/02)

In the presence of sulfuric acid, 3-hydroxyphtalides a, b, and c react with anisol or m-dimethoxybenzene.Aromatic electrophilic substitution takes place and the corresponding 3-arylphtalides 1-5 are obtained.When the other substituant in position 3 is H,

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