(S)-3-Aminoazepan-2-one

Also known as: (S)-3-Amino-2-azepanone, (3S)-3-Aminoazepan-2-one, (3S)-3-Aminohexahydro-2H-azepin-2-one, (S)-3-Aminohexahydro-2-azepinone, L-α-Amino-ε-caprolactam, L-2-Aminohexano-6-lactam, L-Lysine lactam, L-Lys-lactam, L-2-Amino-cycloheptalactam, (S)-α-Amino-ω-caprolactam, 2H-Azepin-2-one, 3-aminohexahydro-, (3S)-, MFCD00064476

(S)-3-Aminoazepan-2-one (CAS 21568-87-6) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6H12N2O and a molecular weight of 128.172 g/mol. Key properties include a boiling point of 315.1±35.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 144.4±25.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21568-87-6
Jingsj CID: J-1110000-8
Molecular Formula: C₆H₁₂N₂O
Molecular Weight: 128.172 g/mol
Category: Ketones
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point	315.1±35.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	144.4±25.9 °C
Exact Mass	128.094955
PSA	55.12000
LogP	-1.64
Vapor Pressure	0.0±0.7 mmHg at 25°C
Refractive Index	1.470
Storage Conditions	−20°C

Customs & Trade Information

HS Code	2933790090
Summary	2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of (S)-3-Aminoazepan-2-one?

The CAS number of (S)-3-Aminoazepan-2-one is 21568-87-6.

What are the molecular formula and molecular weight of (S)-3-Aminoazepan-2-one?

(S)-3-Aminoazepan-2-one has molecular formula C6H12N2O and molecular weight 128.172 g/mol.

What are the upstream and downstream products of (S)-3-Aminoazepan-2-one?

For (S)-3-Aminoazepan-2-one, Upstream Products: L-Lysine hydrochloride, 2,2-Dimethoxypropane, 3-Amino-2-azepanone; Downstream Products: (3S)-Hexahydro-3-[(2-methylpropyl)amino]-2H-azepin-2-one, Caprolactam, (S)-tert-Butyl (2-oxoazepan-3-yl)carbamate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "(S)-3-Aminoazepan-2-one (CAS 21568-87-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1110000-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.