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71721-66-9

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71721-66-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71721-66-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,7,2 and 1 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 71721-66:
(7*7)+(6*1)+(5*7)+(4*2)+(3*1)+(2*6)+(1*6)=119
119 % 10 = 9
So 71721-66-9 is a valid CAS Registry Number.
InChI:InChI=1/C3H5N3O3/c4-2(7)1(6-9)3(5)8/h9H,(H2,4,7)(H2,5,8)

71721-66-9Relevant articles and documents

Nitrite ionic liquids (IL-ONO and [bmim]NO2) as effective nitrosonium sources for the synthesis of α-oximinoketones under mild heterogeneous conditions

Valizadeh,Shomali,Gholipour

experimental part, p. 163 - 166 (2012/03/10)

Ketones and β-diketones were nitrosated and converted to their corresponding α-oximinoketones using task-specific ionic liquids, 1-(4-nitritobutyl)-3-methylimidazolium chloride, IL-ONO, and 1-butyl-3-methylimidazolium nitrite at room temperature. The results from two ionic liquids are comparable and showed that these IL's are effective nitrosonium sources for the preparation of oximinoketones. The protocol is rapid, the yields are excellent, and the method is simple. Copyright

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