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25809-29-4

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25809-29-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25809-29-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,8,0 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 25809-29:
(7*2)+(6*5)+(5*8)+(4*0)+(3*9)+(2*2)+(1*9)=124
124 % 10 = 4
So 25809-29-4 is a valid CAS Registry Number.

25809-29-4Downstream Products

25809-29-4Relevant articles and documents

Ashless additives for lubricating compositions

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, (2008/06/13)

Superior ashless additives for lubricants are prepared by a process comprising first introducing a petroleum sulfonic acid and a polyamine to a reaction zone and subsequently introducing a cyclic anhydride of a dicarboxylic acid into the reaction zone. In another embodiment, the solids content of the additives is reduced to acceptable levels by removal of free SO2 from the petroleum sulfonic acid prior to preparing the additive. Lubricating oil compositions containing these ashless additives are also provided.

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