Cas 151803-99-5,2-butyl-7-phenoxypyrazolanthrone

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Check Digit Verification of cas no

The CAS Registry Mumber 151803-99-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,1,8,0 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 151803-99:
(8*1)+(7*5)+(6*1)+(5*8)+(4*0)+(3*3)+(2*9)+(1*9)=125
125 % 10 = 5
So 151803-99-5 is a valid CAS Registry Number.

151803-99-5Upstream product

82-21-3 1,5-diphenoxyanthracene-9,10-dione

151803-99-5Downstream Products

151803-99-5Relevant articles and documents

SYNTHESIS AND PHOTOCHEMICAL PROPERTIES OF peri-PHENOXY DERIVATIVES OF 6H-ANTHRA-6-PYRAZOLONE (PYRAZOLANTHRONE)

Sokolyuk, N. T.,Pisulina, L. P.,Kozhevnikova, E. I.

, p. 1761 - 1768 (2007/10/02)

5- and 7-Phenoxy-substituted 6H-anthra-6-pyrazolones (pyrazolanthrones) and their 2-butyl and 2-acetyl derivatives were synthesized; 2-acetyl-5-phenoxypyrazolanthrone is photochromic.The photochromism of 7-phenoxypyrazolanthrones is complicated by

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151803-99-5