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137888-43-8

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137888-43-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137888-43-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,8,8 and 8 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137888-43:
(8*1)+(7*3)+(6*7)+(5*8)+(4*8)+(3*8)+(2*4)+(1*3)=178
178 % 10 = 8
So 137888-43-8 is a valid CAS Registry Number.

137888-43-8Downstream Products

137888-43-8Relevant articles and documents

Preparation of Trisulfide Derivatives of Cystine and their Formation as By-products during Peptide Synthesis.

Parmentlir, B.,Moutiez, M.,Tartar, A.,Sergheraert, C.

, p. 3531 - 3534 (1994)

The formation of a trisulfide derivative is observed when di-NH2-protected cystine, is used during peptide synthesis.This side reaction occurs during the coupling step with several coupling reagents.A convenient method for the preparation of these derivatives in mild conditions is described.

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