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98997-63-8

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98997-63-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98997-63-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,9,9 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 98997-63:
(7*9)+(6*8)+(5*9)+(4*9)+(3*7)+(2*6)+(1*3)=228
228 % 10 = 8
So 98997-63-8 is a valid CAS Registry Number.

98997-63-8Downstream Products

98997-63-8Relevant articles and documents

Sustainable Carboxylation of Diamines with Hydrogen Carbonate

Forte, Gianpiero,Chiarotto, Isabella,Richter, Frank,Trieu, Vinh,Feroci, Marta

, p. 1323 - 1327 (2018/09/21)

A protocol for the carboxylation of diamines employing quaternary ammonium hydrogen carbonates as C1 source is presented. The approach is used to obtain industrially relevant bis-O-alkyl carbamates with diverse structural features in very high yield, even on gram scale. The quaternary ammonium salts, formally acting as "transporters" of the carboxylating agent, can be recovered after the reaction, and recycled with high efficiency. Regeneration of the hydrogen carbonates on ion-exchange resin grants excellent atom economy in the process.

Preparation method of spiro quaternary ammonium tetrafluoroborate

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Paragraph 0038, (2017/01/23)

The invention discloses a preparation method of spiro quaternary ammonium tetrafluoroborate. The method comprises steps as follows: (1) an acetonitrile solvent, carbonate, a bromine catalyst, pyrrolidine and 1,4-dichlorobutane are added to a reaction kettle to have a reaction, and a chlorinated spiro quaternary ammonium salt solution is obtained; potassium tetrafluoroborate is added to an acetonitrile solution of chlorinated spiro quaternary ammonium salt, the mixture has a reaction and then is subjected to ion exchange and filtration, carbonate is added to a filtrate, the mixture is stirred, filtered and subjected to reduced-pressure distillation, and a crude spiro quaternary ammonium tetrafluoroborate product is obtained; (2) high-purity spiro quaternary ammonium tetrafluoroborate is obtained with a series of purification methods such as extraction, reduced-pressure distillation, recrystallization, drying and the like. The yield and the purity of spiro quaternary ammonium tetrafluoroborate prepared with the method are relatively high, the content of halide ions and water is low, and spiro quaternary ammonium tetrafluoroborate has the remarkable performance advantage when used as a supercapacitor electrolyte.

Synthesis of oxygen-containing spirobipyrrolidinium salts for high conductivity room temperature ionic liquids

Higashiya, Seiichiro,Devarajan, Thamarai Selvi,Rane-Fondacaro, Manisha V.,Dangler, Christopher,Snyder, Jeremy,Haldar, Pradeep

experimental part, p. 1600 - 1609 (2009/10/16)

Synthesis of ionic liquids (IL) based on oxygen-containing spirobipyrrolidinium salts with BF4 , BF3C 2F5 , and NTf2 as counterions was undertaken. Their physical and electrochemical properties were evaluated for suitability for Room Temperature Ionic Liquids (RTIL) application. Reduction in melting point occurred upon exchange of C(2) by an O-atom of spirobipyrrolidinium, without sacrificing the electrochemical stability; while introduction of alkyl groups between the N- and O-atoms led to incorporation of asymmetry, and hence reduced the melting points, and viscosity.

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