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20227-12-7

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20227-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20227-12-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,2 and 7 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20227-12:
(7*2)+(6*0)+(5*2)+(4*2)+(3*7)+(2*1)+(1*2)=57
57 % 10 = 7
So 20227-12-7 is a valid CAS Registry Number.

20227-12-7Upstream product

20227-12-7Relevant articles and documents

Isolation and structural characterization of a novel galactomannan from Eremurus anisopterus (Ker. et Kir) Regel roots

Hu, Changfeng,Kong, Qingjun,Yang, Deyu,Pan, Yuanjiang

experimental part, p. 402 - 406 (2012/02/03)

A novel galactomannan was obtained from the roots of Eremurus anisopterus (Ker. et Kir) Regel, an ephemeroid plant in the Gurbantunggut Desert in Xinjiang. The crude polysaccharide was extracted following the usual separation procedure, including water dissolution, centrifugation and precipitation with ethanol. The crude polysaccharide was then applied to anion-exchange chromatography and gel filtration to obtain a homogeneous polysaccharide E 1. The average molecular weight of E1 was estimated to be 6 kDa according to the calibration curve. On the basis of composition analysis, methylation analysis, periodate oxidation analysis, Smith degradation, infrared spectra (IR) and nuclear magnetic resonance (NMR) experiments, E1 is a novel linear galactomannan with a main chain composed of (1 → 6)-linked α-d-Galp and (1 → 2)-α-d-Manp at a relative molar ratio of 1:3.

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