N-Acetyl-D-cysteine

N-乙酰基-D-半胱氨酸

Also known as: Ac-D-Cys-OH, D-N-Acetylcysteine, N-Acetyl-(S)-cysteine, D-Cysteine, N-acetyl-, Acetylcysteine Impurity 5, Acetylcysteine Impurity F, Cysteine, N-acetyl-, D- (8CI), (2R)-2-acetamido-3-sulfanylpropanoic acid, Einecs 247-470-5

N-Acetyl-D-cysteine (CAS 26117-28-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H9NO3S and a molecular weight of 163.195 g/mol. It is also known as Ac-D-Cys-OH, D-N-Acetylcysteine and N-Acetyl-(S)-cysteine. Key properties include a boiling point of 407.7±40.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 200.4±27.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 26117-28-2
Jingsj CID: J-1958512-1
Molecular Formula: C₅H₉NO₃S
Chinese Name: N-乙酰基-D-半胱氨酸
Molecular Weight: 163.195 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	407.7±40.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	200.4±27.3 °C
Exact Mass	163.030319
PSA	108.69000
LogP	-0.15
Vapor Pressure	0.0±2.0 mmHg at 25°C
Refractive Index	1.519

Activity & Biological Data

Additional Information	[1]. Maika Deffieu, et al. Glutathione Participates in the Regulation of Mitophagy in Yeast.J Biol Chem. 2009 May 29;284(22):14828-37. [2]. B K Wong,et al. Selective Effects of N-acetylcysteine Stereoisomers on Hepatic Glutathione and Plasma Sulfate in Mice. Toxicol Appl Pharmacol [3]. Suparna Qanungo, et al. N-Acetyl-L-cysteine Enhances Apoptosis Through Inhibition of Nuclear factor-kappaB in Hypoxic Murine Embryonic Fibroblasts. J Biol Chem

Additional Information

[1]. Maika Deffieu, et al. Glutathione Participates in the Regulation of Mitophagy in Yeast.J Biol Chem. 2009 May 29;284(22):14828-37. [2]. B K Wong,et al. Selective Effects of N-acetylcysteine Stereoisomers on Hepatic Glutathione and Plasma Sulfate in Mice. Toxicol Appl Pharmacol [3]. Suparna Qanungo, et al. N-Acetyl-L-cysteine Enhances Apoptosis Through Inhibition of Nuclear factor-kappaB in Hypoxic Murine Embryonic Fibroblasts. J Biol Chem

Customs & Trade Information

HS Code	2930909090
Summary	2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of N-Acetyl-D-cysteine?

The CAS number of N-Acetyl-D-cysteine is 26117-28-2.

What are the molecular formula and molecular weight of N-Acetyl-D-cysteine?

N-Acetyl-D-cysteine has molecular formula C5H9NO3S and molecular weight 163.195 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "N-Acetyl-D-cysteine (CAS 26117-28-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1958512-1 (accessed 2026-10-28).

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