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2,2,5,5-Tetramethylcyclopentanone (TMCP) is an organic compound with the chemical formula C9H16O. It is a colorless liquid with a strong, pungent odor and is used as a synthetic intermediate in the production of various chemicals, including pharmaceuticals, agrochemicals, and fragrances. TMCP is synthesized through the reaction of acetone and isopropyl alcohol in the presence of an acid catalyst. It is also known as 2,2,5,5-tetramethyl-2-cyclopenten-1-one or 2,2,5,5-tetramethylcyclopentan-1-one. Due to its reactivity and potential health risks, proper handling and safety measures are essential when working with TMCP.

4541-35-9

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4541-35-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4541-35-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,5,4 and 1 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 4541-35:
(6*4)+(5*5)+(4*4)+(3*1)+(2*3)+(1*5)=79
79 % 10 = 9
So 4541-35-9 is a valid CAS Registry Number.
InChI:InChI=1/C9H16O/c1-8(2)5-6-9(3,4)7(8)10/h5-6H2,1-4H3

4541-35-9SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name 2,2,5,5-tetramethylcyclopentan-1-one

1.2 Other means of identification

Product number -
Other names 2,2,5,5-Tetramethyl-cyclopentanon

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:4541-35-9 SDS

4541-35-9Relevant academic research and scientific papers

Highly regioselective alkylation at the more hindered α-site of unsymmetrical ketones by use of their potassium enolates. A comparative study with lithium enolates

Quesnel, Yannick,Bidois-Sery, Laure,Poirier, Jean-Marie,Duhamel, Lucette

, p. 413 - 415 (2007/10/03)

Alkylation of regioisomeric potassium enolates 4 and 6 obtained from corresponding silyl enol ethers 2 and 3 occurs at the most substituted site affording ketones 8. Alkylation of corresponding lithium enolates 5 and 7 occurs at the expected site affording ketones 8 or 9. As an application the one pot synthesis of spiroketones 13 from silyl enol ethers 12 is described.

(E/Z) Equilibria, 16. Lone Electron Pair Donor Quality of the Imino Function: Synthesis and Reactivity of Sterically Strongly Congested Iminocyclopentanes

Knorr, Rudolf,Hintermeyer-Hilpert, Monika,Mehlstaeubl, Johann,Hoang, Thi Phung,Neuner, Brigitte,Boehrer, Petra

, p. 211 - 216 (2007/10/02)

2,6-Dimethyl-N-(2,2,5,5-tetramethylcyclopentylidene)aniline (4h) is obtained by permethylation; it forms salts (5) by N-protonation.Its CN double bond is strongly shielded against nucleophilic attack and cannot be hydrolyzed.Nitration and bromination occur smoothly in the aromatic p-position (12, 13), showing the directing power of the lone electron pair of the imino function.This ?-donor quality is assessed by probing weaker electrophiles and by qualitative competition experiments. Key Words: Imines / Permethylation / Substitution, electrophilic aromatic / Steric shielding

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