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137920-57-1

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137920-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137920-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,2 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 137920-57:
(8*1)+(7*3)+(6*7)+(5*9)+(4*2)+(3*0)+(2*5)+(1*7)=141
141 % 10 = 1
So 137920-57-1 is a valid CAS Registry Number.

137920-57-1Downstream Products

137920-57-1Relevant articles and documents

Discovery of novel UV-filters with favorable safety profiles in the 5-arylideneimidazolidine-2,4-dione derivatives group

Popió?, Justyna,Gunia-Krzyzak, Agnieszka,Piska, Kamil,Zelaszczyk, Dorota,Koczurkiewicz, Paulina,S?oczynska, Karolina,Wójcik-Pszczo?a, Katarzyna,Krupa, Anna,Kryczyk-Poprawa, Agata,Zes?awska, Ewa,Nitek, Wojciech,Zmudzki, Pawe?,Marona, Henryk,Pekala, Elzbieta

, (2019)

Effective protection from the harmful effects of UV radiation may be achieved by using sunscreens containing organic or inorganic UV filters. The number of currently available UV filters is limited and some of the allowed molecules possess limitations such as systemic absorption, endocrine disruption properties, contact and photocontact allergy induction, and low photostability. In the search for new organic UV filters we designed and synthesized a series consisting of 5-benzylidene and 5-(3-phenylprop-2-en-1-ylidene)imidazolidine-2,4-dione (hydantoin) derivatives. The photoprotective activity of the tested compounds was confirmed in methanol solutions and macrogol formulations. The most promising compounds possessed similar UV protection parameter values as selected commercially available UV filters. The compound diethyl 2,20-((Z)-4-((E)-3-(4-methoxyphenyl)allylidene)-2,5-dioxoimidazolidine-1,3-diyl)diacetate (4g) was characterized as an especially efficient UVA photoprotective agent with a UVA PF of 6.83 ± 0.05 and favorable photostability. Diethyl 2,20-((Z)-4-(4-methoxybenzylidene)-2,5-dioxo-imidazolidine-1,3-diyl)diacetate (3b) was the most promising UVB-filter, with a SPFin vitro of 3.07 ± 0.04 and very good solubility and photostability. The main photodegradation products were geometric isomers of the parent compounds. These compounds were also shown to be non-cytotoxic at concentrations up to 50 μM when tested on three types of human skin cells and possess no estrogenic activity, according to the results of a MCF-7 breast cancer model.

REACTIONS OF CHLOROSULFONYLBENZYLIDENE HYDANTOINS

Cremlyn, Richard,Jethwa, Sanjay,Joiner, Graham,White, David

, p. 99 - 110 (2007/10/02)

5-(Benzylidene- and o-chlorobenzylidene-) and cinnamylidene-hydantoins reacted with chlorosulfonic acid to give the corresponding p-sulfonyl chlorides (1, 35, 44).These were converted into 49 derivatives by reaction with amines, hydrazines and azide ion.

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