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Butanedioic acid, (phenyl-2-thienylmethylene)-, 1-methyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

339984-77-9

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339984-77-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 339984-77-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,9,9,8 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 339984-77:
(8*3)+(7*3)+(6*9)+(5*9)+(4*8)+(3*4)+(2*7)+(1*7)=209
209 % 10 = 9
So 339984-77-9 is a valid CAS Registry Number.

339984-77-9Relevant academic research and scientific papers

Photochromic heterocyclically anellated indenochromene compounds

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Page column 13, (2010/02/06)

The present invention relates to specific photochromic heterocyclically annellated indenochromene derivatives and the use thereof in plastics of all types, particularly for ophthalmic applications. In particular, the present invention relates to indeno[2,1-f]chromene derivatives having the following general formula (I) and indeno[1,2-h]chromene derivatives having the following general formula (II):

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