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90997-25-4

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90997-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90997-25-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,9,9 and 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 90997-25:
(7*9)+(6*0)+(5*9)+(4*9)+(3*7)+(2*2)+(1*5)=174
174 % 10 = 4
So 90997-25-4 is a valid CAS Registry Number.

90997-25-4Downstream Products

90997-25-4Relevant articles and documents

PORPHYRINS AND THEIR DERIVATIVES. I. SYNTHESIS AND CHARACTERISTICS OF STERICALLY SCREENED PORPHYRINS

Bogat-skii, A. V.,Zhilina, Z. I.,Krasnoshchekaya, S. P.,Zakharova, R. M.

, p. 2035 - 2039 (2007/10/02)

meso-Tetra(o-nitrophenyl)porphyrin was obtained by the acid condensation of o-nitrobenzaldehyde and pyrrole, and its reduction with stannous chloride led to meso-tetra(o-aminophenyl)porphyrin.The α,α,α,α-isomer of meso-tetra(o-aminophenyl)porphyrin was is

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