Cisatracurium besylate

Also known as: cisatracurium besilate, Nimbex, 51w89, (1R,1'R,2R,2'R)-2,2'-[1,5-pentanediylbis[oxy(3-oxo-3,1-propanediyl)]]bis[1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-isoquinolinium] dibenzenesulfonate, (1R,2R,1'R,2'R)-2,2'-{1,5-Pentanediylbis[oxy(3-oxo-3,1-propanediyl)]}bis[1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolinium] bisbenzenesulfonate, UNII:Y78PS7MEDE

Cisatracurium besylate (CAS 96946-42-8) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C65H82N2O18S2 and a molecular weight of 1243.479 g/mol. Key property: a melting point of 90-93ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 96946-42-8
Jingsj CID: J-1984296-9
Molecular Formula: C₆₅H₈₂N₂O₁₈S₂
Molecular Weight: 1243.479 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	90-93ºC
Exact Mass	1242.500366
PSA	257.60000
LogP	11.32610

GHS Safety & Compliance

Acute ToxicitySignal word: Danger

H301 — Toxic if swallowed
H319 — Causes serious eye irritation

Activity & Biological Data

Additional Information	[1]. Dear, G.J., et al., Identification of urinary and biliary conjugated metabolites of the neuromuscular blocker 51W89 by liquid chromatography/mass spectrometry. Rapid Commun Mass Spectrom, 1995. 9(14): p. 1457-64. [2]. Serra, C.S. and A.C. Oliveira, Cisatracurium: myographical and electrophysiological studies in the isolated rat muscle. Fundam Clin Pharmacol, 2006. 20(3): p. 291-8.

Customs & Trade Information

HS Code	2914509090
Summary	HS:2914509090 other ketones with other oxygen function VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Cisatracurium besylate?

The CAS number of Cisatracurium besylate is 96946-42-8.

What are the molecular formula and molecular weight of Cisatracurium besylate?

Cisatracurium besylate has molecular formula C65H82N2O18S2 and molecular weight 1243.479 g/mol.

Is Cisatracurium besylate hazardous?

Cisatracurium besylate has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H319 — Causes serious eye irritation.

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. "Cisatracurium besylate (CAS 96946-42-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1984296-9 (accessed 2026-11-07).

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