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54917-70-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54917-70-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,9,1 and 7 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 54917-70:
143 % 10 = 3
So 54917-70-3 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017


1.1 GHS Product identifier

Product name [4-(5,7,8-triacetyloxy-4-oxochromen-2-yl)phenyl] acetate

1.2 Other means of identification

Product number -
Other names 4',5,7,8-Tetraacetoxyflavon

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:54917-70-3 SDS

54917-70-3Downstream Products

54917-70-3Relevant articles and documents

Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. VI. Demethylation of 8-Hydroxy-5,7-dimethoxyflavones with Anhydrous Aluminum Chloride or Bromide in Acetonitrile

Horie, Tokunaru,Kourai, Hiroki,Fujita, Nobuhisa

, p. 3773 - 3780 (2007/10/02)

The demethylation of seven 8-hydroxy-5,7-dimethoxyflavones with anhydrous aluminum chloride or bromide in acetonitrile was studied and the following results were obtained. (1) Anhydrous aluminum chloride in acetonitrile selectively split the 5-methoxyl group without cleavage of the 7-methoxyl group, and seven 5,8-dihydroxy-7-methoxy-flavones were quantitatively synthesized by the demethylation. (2) In the demethylation with anhydrous aluminum bromide, the 5- and 7-methoxyl groups on 4',5,7-trimethoxy- and 3',4',5,7-tetramethoxy-8-hydroxyflavone were selectively split to give the corresponding 5,7,8-trihydroxyflavones in good yield.However, the demethylation was not accessible to the synthesis of 5,7,8-trihydroxy-3',4',5'-trimethoxyflavone, 4',5,7,8-tetrahydroxy-3'-methoxy-, and 3',5,7,8-tetrahydroxy-4'-methoxyflavone, because of the cleavage of the methoxyl groups on the B ring.The synthesized flavones were employed for the identification of the two natural flavones, which were proposed to be 4',5,8-trihydroxy-7-methoxyflavone and 4',5,8-trihydroxy-3',7-dimethoxyflavone.The former, salvitin, was revised to 4',5,7-trihydroxy-6-methoxyflavone and the latter seemed to be 4',5,7-trihydroxy-3',8-dimethoxyflavone.

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