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131801-83-7

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131801-83-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131801-83-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,8,0 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131801-83:
(8*1)+(7*3)+(6*1)+(5*8)+(4*0)+(3*1)+(2*8)+(1*3)=97
97 % 10 = 7
So 131801-83-7 is a valid CAS Registry Number.

131801-83-7Relevant articles and documents

Methods for preparation of lycopenes from C-15 Wittig salts and methods for purification of high all-E containing and high 6Z containing C15-Wittig salts

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Paragraph 0024, (2016/01/11)

The present invention relates to methods for preparation of lycopenes, especially to lycopenes with high all-E contents or high 6Z contents from C15-Wittig salts mixtures (with high all-E-contents and high 6Z-contents, respectively). C15-Wittig salts mixtures are purified and 6Z-C15-Wittig salts are extracted from the mixtures. The extracted 6Z-C 15-Wittig salts are used in the synthesis of lycopenes with high 6Z contents and the residues are used in the synthesis of lycopenes with high all-E contents.

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