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158817-74-4

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158817-74-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158817-74-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,8,1 and 7 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 158817-74:
(8*1)+(7*5)+(6*8)+(5*8)+(4*1)+(3*7)+(2*7)+(1*4)=174
174 % 10 = 4
So 158817-74-4 is a valid CAS Registry Number.

158817-74-4Upstream product

158817-74-4Downstream Products

158817-74-4Relevant articles and documents

Organoboryl Sulfates - Preparation and Characterisation

Koester, Roland,Schuessler, Wilhelm,Blaeser, Dieter,Boese, Roland

, p. 1593 - 1598 (2007/10/02)

Triethylborane (3) reacts with sulfuric acid to form the sulfate Et2BOS(O2)OBEt2 (1a), which can also be prepared from (Et2B)2O (4a) and SO3.Sulfate 1a reacts with (C8H14B)2O (4b) to give the solid sulfate C8H14BOS(O2)OBC8H14 (1b) and 4a.Compound 1b is also obtained by treating 4b with SO3.The reaction of 4a with sulfuric acid leads to the crystalline cyclic sulfate (2a) (X-ray structure analysis). 2a is also available from triethylboroxin (5) on reaction with SO3.The diboroxanes 4a and 4b and H2SO4 form insoluble 1:1 addition complexes 4a*H2SO4 and 4b*H2SO4, which react on heating at about 60 deg C to yield the cyclic sulfates 2a and (2b), respectively. - Key Words: Boryl sulfates, diethyl-, 9-BBN- / Sulfatoboranes / Ethylboronic acid, sulfuric acid, mixed anhydrides of / Sulfatization of boranes / Diboroxane, cyclic

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