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135491-07-5

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135491-07-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 135491-07-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,4,9 and 1 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 135491-07:
(8*1)+(7*3)+(6*5)+(5*4)+(4*9)+(3*1)+(2*0)+(1*7)=125
125 % 10 = 5
So 135491-07-5 is a valid CAS Registry Number.

135491-07-5Relevant articles and documents

Preparation and Properties of ω-Phosphino-phosphoniocarboxylic Acids and their Betaines

Aly, Aref A. M.,Schmidbaur, Hubert

, p. 775 - 778 (2007/10/02)

In an attempt to provide phosphorus analogues of aminocarboxylic acids and their betaines, α,ω-bis(diphenylphosphino)alkanes (dppm, dppe, dppp, dppb) were converted into ω-phosphino-phosphoniocarboxylates and diphosphonio-biscarboxylates.While the reactions with haloacetic acids or haloacetates only lead to methylphosphonium derivatives owing to decarboxylation of the intermediates, β-chloropropionic acids converts Ph2P(CH2)nPPh2 compounds into the target products Ph2PCH2PPh2+(CH2)2COOHCl- (1) and CH22*2Cl- (2), for n = 1.For n = 2, 3 and 4, only the analogues of 2 could be prepared (3-5).Treatment of 1 and 2 with sodium bicarbonate afforded the corresponding betaines Ph2PCH2PPh2+CH2CH2COO- (isolated as a dihydrate 6) and CH2+CH2CH2COO->2 (isolated as the tetrahydrate 7).

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