tert-butyl (2-methyl-5-oxocyclopentyl)carbamate

(2-甲基-5-氧代环戊基)-氨基甲酸叔丁酯

Also known as: (2-methyl-5-oxo-cyclopentyl)-carbamic acid tert-butyl ester, carbamic acid, (2-methyl-5-oxocyclopentyl)-, 1,1-dimethylethyl ester, tert-butyl N-(2-methyl-5-oxocyclopentyl)carbamate, carbamic acid, (2-methyl-5-oxocyclopentyl)-, 1,1-dimethylethyl ester, (1S-trans)- (9CI)

tert-butyl (2-methyl-5-oxocyclopentyl)carbamate (CAS 138871-73-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H19NO3 and a molecular weight of 213.27300 g/mol. It is also known as (2-methyl-5-oxo-cyclopentyl)-carbamic acid tert-butyl ester, carbamic acid, (2-methyl-5-oxocyclopentyl)-, 1,1-dimethylethyl ester and tert-butyl N-(2-methyl-5-oxocyclopentyl)carbamate. Key properties include a boiling point of 325.9ºC at 760mmHg, a density of 1.05g/cm3 and a flash point of 150.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
138871-73-5
Jingsj CID
J-1331304-5
Molecular Formula
C11H19NO3
Chinese Name
(2-甲基-5-氧代环戊基)-氨基甲酸叔丁酯
Molecular Weight
213.27300 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point325.9ºC at 760mmHg
Density1.05g/cm3
Flash Point150.9ºC

Frequently Asked Questions

What is the CAS number of tert-butyl (2-methyl-5-oxocyclopentyl)carbamate?

The CAS number of tert-butyl (2-methyl-5-oxocyclopentyl)carbamate is 138871-73-5.

What are the molecular formula and molecular weight of tert-butyl (2-methyl-5-oxocyclopentyl)carbamate?

tert-butyl (2-methyl-5-oxocyclopentyl)carbamate has molecular formula C11H19NO3 and molecular weight 213.27300 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "tert-butyl (2-methyl-5-oxocyclopentyl)carbamate (CAS 138871-73-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1331304-5 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.