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172288-49-2

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172288-49-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172288-49-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,2,8 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 172288-49:
(8*1)+(7*7)+(6*2)+(5*2)+(4*8)+(3*8)+(2*4)+(1*9)=152
152 % 10 = 2
So 172288-49-2 is a valid CAS Registry Number.

172288-49-2Upstream product

172288-49-2Relevant articles and documents

Preparation of esters of phosphorus acids

-

, (2008/06/13)

Esters of phosphorus acids are prepared by an improved process whereby aromatic alcohols and phosphorus halides are reacted at specified temperatures in the presence of amine catalysts thereby providing high yields of substantially pure esters and allowing preparation of selected halogen-containing mono- and di-esters of phosphorus acids wherein halogen is directly bonded to phosphorus having substantially no side reactant contamination. The phosphorus esters are useful as intermediates in the preparation of plasticizers, oil additives and functional fluids.

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