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64244-20-8

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64244-20-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64244-20-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,2,4 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 64244-20:
(7*6)+(6*4)+(5*2)+(4*4)+(3*4)+(2*2)+(1*0)=108
108 % 10 = 8
So 64244-20-8 is a valid CAS Registry Number.

64244-20-8Relevant articles and documents

An improved synthesis of 4-azido-4-deoxy- and 4-amino-4-deoxy-α,α-trehalose and their epimers

Bassily, Rafik W.,El-Sokkary, Ramadan I.,Silwanis, Basim Azmy,Nematalla, Asaad S.,Nashed, Mina A.

, p. 197 - 208 (1993)

The order of esterification of the eight hydroxyl groups of α,α-trehalose is HO-6,6' > HO-2,2' > HO-3,3' > HO-4,4'.Under the appropriate conditions of benzoylation, the heptabenzoate with HO-4' free was obtained in good yield (58percent), along with the o

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