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153991-51-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 153991-51-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,3,9,9 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 153991-51:
156 % 10 = 6
So 153991-51-6 is a valid CAS Registry Number.

153991-51-6Upstream product

153991-51-6Relevant articles and documents

Reactions of 2,2,4-Trimethyl-2H-benzopyran and 2,2,4-Trimethyl-2H-naphthopyran with Bromine

Bradley, Eric,Cotterill, W. David,Livingstone, Robert,O'Donnell, Patrick A.

, p. 2101 - 2124 (2007/10/02)

The reaction between 2,2,4-trimethyl-2H-benzopyran and an excess of bromine gave a mixture of 3,6,8-tribromo-4-bromomethyl-2,2-dimethyl-2H-benzopyran and 3,6,8-tribromo-4-dibromomethyl-2,2-dimethyl-2H-benzopyran.The mixture had the same m.p. as t

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