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431-81-2

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431-81-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 431-81-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,3 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 431-81:
(5*4)+(4*3)+(3*1)+(2*8)+(1*1)=52
52 % 10 = 2
So 431-81-2 is a valid CAS Registry Number.

431-81-2Relevant articles and documents

Method for preparing 3,3,3-trichloro-1,1,1-trifluoropropane through gas-phase catalytic chlorination

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Paragraph 0032-0043, (2021/06/22)

The invention discloses a method for preparing 3,3,3-trichloro-1,1,1-trifluoropropane through gas-phase catalytic chlorination through gas-phase catalytic chlorination. The method comprises the following step: under the action of a catalyst, subjecting 3,3-dichloro-1,1,1-trifluoropropane and chlorine serving as raw materials to a gas-phase catalytic chlorination reaction in a catalyst bed layer, wherein the catalyst is a molecular sieve, and the molecular sieve is at least one selected from ZSM-5, 5A, MCM-41, a beta type molecular sieve and a Y type molecular sieve. The molecular sieve which is cheap and easy to obtain is used as the catalyst, the reaction is carried out under a gas phase condition, and the method has the advantages of high space time yield, simple process, safe operation, low production cost and the like.

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