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116143-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 116143-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,1,4 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 116143-54:
95 % 10 = 5
So 116143-54-5 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 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name 9-fluorenone dimethyl acetal

1.2 Other means of identification

Product number -
Other names .fluoren-9-one-dimethylacetal

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:116143-54-5 SDS

116143-54-5Upstream product

116143-54-5Relevant articles and documents

Addition of 9-Diazofluorene to Unsubstituted and Chloro-Substituted 1,4-Benzoquinones. A Comparison with the Addition of Diphenyldiazomethane

Oshima, Takumi,Nagai, Toshikazu

, p. 2580 - 2584 (1989)

Unsubstituted 1,4-benzoquinine (1a) reacted at the C=C double bond with 9-diazofluorene (9-DF) to give norcarene dione 2a and 4,7-dihydroxy-3H-indazole 4a.Similarly, the reaction of 2-chloro-1,4-benzoquinone (1b) with 9-DF yielded norcarene dione 2b and 4,7-dihydroxy-3H-indazole 4b, together with tricyclic dione 3b. 2,3-dichloro-1,4-benzoquinone (1c) and 9-DF produced norcarene dione 2c, 4,7-dihydroxy-3H-indazole 4c, and its fluorenyl ether 5c.Reactions of 2,5- and 2,6-dichloro- and trichloro-1,4-benzoquinones (1d, 1e, and 1f) with 9-DF provided norcarene diones 2d, 2e, and 2f and tricyclic diones 3d and 3e, respectively.On the other hand, tetrachloro-1,4-benzoquinone (1g) converted 9-DF into 9,9'-bifluorenylidene possibly via a 1 : 1 betaine intermediate arising from the C=O double bond addition.These results were markedly different from those of the previous diphenyldiazomethane reactions and are discussed in terms of structural changes of these diazoalkanes.

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