L-Lysine

Also known as: (S)-2,6-Diaminohexanoic acid, 2,6-Diaminocaproic acid, H-Lys-OH, L-2,6-Diaminohexanoic acid, L-Lysine base, L-Lys, L-(+)-Lysine, Lysine, Lysine acid, 2,6-Diaminohexanoic acid, (S)-2,6-Diaminocaproic acid, (S)-(+)-Lysine, 6-Amino-L-norleucine, FEMA 3847

L-Lysine (CAS 56-87-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H14N2O2 and a molecular weight of 146.188 g/mol. Key properties include a melting point of 215 °C (dec.)(lit.), a boiling point of 311.5±32.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 142.2±25.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 56-87-1
Jingsj CID: J-49361-8
Molecular Formula: C₆H₁₄N₂O₂
Molecular Weight: 146.188 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	215 °C (dec.)(lit.)
Boiling Point	311.5±32.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	142.2±25.1 °C
Exact Mass	146.105530
PSA	89.34000
LogP	-1.04
Vapor Pressure	0.0±1.4 mmHg at 25°C
Refractive Index	1.503
Additional Property	H2O: 0.1 g/mL, clear, colorless

Activity & Biological Data

Target	L-lysine (150 mg/kg) promotes, but not initiates, bladder cancer. The administration of L-lysine to rats submitted to colovesical cystoplasty accelerates the development of transitional metaplasia of the intestinal epithelium[1]. L-lysine (10 mg/kg) treatment attenuates pancreatic tissue injury induced by L-arginine by inhibiting the release of the inflammatory cytokine IL-6 and enhance antioxidant activity[2].
Additional Information	[1]. Santos AMD, et al. Transitional metaplasia in intestinal epithelium of rats submitted to intestinal cystoplasty and treatment with L -lysine. Acta Cir Bras. 2017 Apr;32(4):297-306. [2]. Al-Malki AL. Suppression of acute pancreatitis by L-lysine in mice. BMC Complement Altern Med. 2015 Jun 23;15:193.

Target

L-lysine (150 mg/kg) promotes, but not initiates, bladder cancer. The administration of L-lysine to rats submitted to colovesical cystoplasty accelerates the development of transitional metaplasia of the intestinal epithelium[1]. L-lysine (10 mg/kg) treatment attenuates pancreatic tissue injury induced by L-arginine by inhibiting the release of the inflammatory cytokine IL-6 and enhance antioxidant activity[2].

Additional Information

[1]. Santos AMD, et al. Transitional metaplasia in intestinal epithelium of rats submitted to intestinal cystoplasty and treatment with L -lysine. Acta Cir Bras. 2017 Apr;32(4):297-306. [2]. Al-Malki AL. Suppression of acute pancreatitis by L-lysine in mice. BMC Complement Altern Med. 2015 Jun 23;15:193.

Customs & Trade Information

HS Code	2922411000
Summary	HS: 2922411000. 2,6-diaminohexanoic acid. VAT:17.0%. tax rebate rate:9.0%. supervision conditions:ab(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tarrif:5.0%. general tariff:20.0%

Frequently Asked Questions

What is the CAS number of L-Lysine?

The CAS number of L-Lysine is 56-87-1.

What are the molecular formula and molecular weight of L-Lysine?

L-Lysine has molecular formula C6H14N2O2 and molecular weight 146.188 g/mol.

What are the upstream and downstream products of L-Lysine?

For L-Lysine, Upstream Products: DL-Lysine, N2,N6-bis[(phenylmethoxy)carbonyl]-L-lysine, N-[(Benzyloxy)carbonyl]-L-lysine; Downstream Products: Biocytin, 2,3-dimethylpyrazine, 2-Ethyl-3,6-dimethylpyrazine.

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. "L-Lysine (CAS 56-87-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49361-8 (accessed 2026-11-09).

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