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9-Hydroxy-1,8-naphthalide, also known as 9-hydroxy-1,8-dihydroxy-3,4-dioxonaphthalene, is a chemical compound with the molecular formula C10H6O4. It is a white crystalline solid that is soluble in organic solvents and has a melting point of 220-222°C. 9-HYDROXY-1,8-NAPHTHALIDE is primarily used as an intermediate in the synthesis of various pharmaceuticals, dyes, and pigments. It is also known for its potential applications in the production of fluorescent brightening agents and other specialty chemicals. The compound is synthesized through various methods, including the condensation of phthalic anhydride with salicylaldehyde in the presence of a catalyst. Due to its reactivity and potential applications, 9-hydroxy-1,8-naphthalide is an important compound in the field of organic chemistry and chemical engineering.

5656-90-6

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5656-90-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5656-90-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,5 and 6 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5656-90:
(6*5)+(5*6)+(4*5)+(3*6)+(2*9)+(1*0)=116
116 % 10 = 6
So 5656-90-6 is a valid CAS Registry Number.
InChI:InChI=1/C12H8O3/c13-11-8-5-1-3-7-4-2-6-9(10(7)8)12(14)15-11/h1-6,11,13H

5656-90-6SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name 9-Hydroxy-1,8-naphthalide

1.2 Other means of identification

Product number -
Other names EINECS 227-104-0

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:5656-90-6 SDS

5656-90-6Relevant academic research and scientific papers

Ozonolyses of cycloalkenes in the presence of carbonyl compounds

Shin, Hyea Sook,Lee, Chi Won,Lee, Joo Yeon,Huh, Tae Sung

, p. 335 - 348 (2007/10/03)

Ozonolysis reactions of a series of cyclic olefins 1 in the presence of carbonyl compounds 6 provided the corresponding cross-ozonides 42. Further reactions of ozonides 42 with the independently prepared carbonyl oxide +CH2-OO- gave diozonides of structure 43. All of the new ozonides have been isolated as pure substances and characterized by their 1H- and 13C- NMR spectra.

Perilithiation and the synthesis of 8-substituted-1-naphthamides

Clayden, Jonathan,Frampton, Christopher S.,McCarthy, Catherine,Westlund, Neil

, p. 14161 - 14184 (2007/10/03)

Attempted perilithiation of 1-naphthamides with their 2-positions blocked leads only to nucleophilic attack on the aromatic ring, but perilithiation of naphthalenes bearing 1-substituents such as -NMe2 or CH2NMe2 allows the synthesis of 8-substituted-1-naphthamldes. The 8- CH2NMe2 substituents can be converted to carbonyl groups by Polonovski reactions; other 8-substituents may be introduced by using naphthalic anhydride as a starting material.

Ring-chain tautomerism. Part 10 +. The reaction of oxocarboxylic acids with diazodiphenylmethane

Bowden, Keith,Misic-Vukovic, Milica M.,Ranson, Richard J.

, p. 1601 - 1606 (2007/10/03)

The rate coefficients for the esterification of a series of oxocarboxylic acids with diazodiphenylmethane have been determined in ethanol or 2-methoxyethanol at 30.0°C. These and the rates of reaction with model compounds have been used to estimate the equilibrium constants for ring-chain tautomerism for the oxocarboxylic acids.

New Modified Heterocyclic Phenylalanine Derivatives. Incorporation into Potent Inhibitors of Human Renin

Ocain, Timothy D.,Deininger, David D.,Russo, Ralph,Senko, Nancie A.,Katz, Alan,et al.

, p. 823 - 832 (2007/10/02)

Modified heterocyclic phenylalanine analogues designed as replacements for the P3-P4 region were synthesized and incorporated into renin inhibitors.These inhibitors were found to have significant activity versus human recombinant renin, as well as in vivo activity.The compounds proved to be very resistant to chymotrypsin degradation, as exemplified by compound 8, which remained greater than 60percent intact after a 24-h exposure to chymotrypsin.In contrast, the Boc-Phe analogue was nearly completely degraded after 1 h.Compound 6 proved to be the most potent renin inhibitor with an IC50=8.9 nM.These stable cyclized phenylalanines should prove to be generally useful as a substitute for Boc-Phe in protease inhibitors.

Synthetic Photochemistry. XVIII. A Sensitizer Dependence in the Photooxidation of Indene and Acenaphthylene. The Occurrence of cis-1,2-Glycol Formation in a Rose Bengal-sensitized Reaction

Hatsui, Toshihide,Takeshita, Hitoshi

, p. 2655 - 2658 (2007/10/02)

Upon Rose Bengal-sensitized photooxygenation, indene and acenaphthylene afforded substantial amounts of the expected cis-glycols by means of the reduction of the intermediate dioxetanes.The formerly proposed structure of one of the isomeric methoxy hydroperoxides was revised on the basis of the chemical and spectral evidence.

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