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16020-34-1

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16020-34-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16020-34-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,0,2 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 16020-34:
(7*1)+(6*6)+(5*0)+(4*2)+(3*0)+(2*3)+(1*4)=61
61 % 10 = 1
So 16020-34-1 is a valid CAS Registry Number.

16020-34-1Downstream Products

16020-34-1Relevant articles and documents

On the photodegradation of some 2H-chromene derivatives in fluid solution or in polyurethane matrix

Alberti, Angelo,Campredon, Mylene,Demadrille, Renaud

experimental part, p. 552 - 561 (2011/06/25)

The time profile of the optical density was monitored during the photodegradation of three derivatives of 2,2-diphenyl-2H-naphtho[1,2-b]pyran (1), namely 2,2-bis(4-methoxyphenyl)-5,6-dimethyl-2H-naphtho[1,2-b]pyran (2), 2,2-diphenyl-5-[(ethoxycarbonyl)methoxycarbonyl]-8-methyl-2H-naphtho[1,2-b] pyran (3), and 3,3-bis(4-methoxyphenyl)-6,11-dimethyl-13-hydroxy-13-isopropyl- 3H-indeno[2,1-f ]naphtho[1,2-b]pyran (4) either in toluene solution or in a polyurethane matrix. The photoproducts were identified using HPLC, GC/MS, and direct insertion MS techniques. High molecular weight oxygenated derivatives and new photoproducts deriving from a secondary oxidative pathway were characterized along with expected degradation derivatives. Some of the photoproducts considered responsible for the yellowing of the examined materials were identified. The effect exerted by two additives generally considered to have an inhibiting action toward radical processes was also evaluated.

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