Atracurium Besylate

Catalog No.S1832 Synonyms: BW 33A, 51W89

For research use only.

Atracurium Besylate (BW 33A, 51W89) is a neuromuscular blocking agent with ED95 of 0.2 mg/kg.

Atracurium Besylate Chemical Structure

CAS No. 64228-81-5

Purity & Quality Control

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Biological Activity

Description Atracurium Besylate (BW 33A, 51W89) is a neuromuscular blocking agent with ED95 of 0.2 mg/kg.

Protocol (from reference)

Solubility (25°C)

In vitro

Chemical Information

Molecular Weight 1243.48


CAS No. 64228-81-5
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles C[N+]1(CCC2=CC(=C(C=C2C1CC3=CC(=C(C=C3)OC)OC)OC)OC)CCC(=O)OCCCCCOC(=O)CC[N+]4(CCC5=CC(=C(C=C5C4CC6=CC(=C(C=C6)OC)OC)OC)OC)C.C1=CC=C(C=C1)S(=O)(=O)[O-].C1=CC=C(C=C1)S(=O)(=O)[O-]

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

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Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Molarity Calculator

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT05231525 Recruiting Device: WiTOF|Device: TOFscan Neuromuscular Residual Curarization Poitiers University Hospital March 9 2022 Not Applicable
NCT03558516 Completed Drug: Magnesium group|Drug: Normal saline group Meningioma Mahidol University August 1 2018 Phase 3
NCT03319563 Completed Drug: Local anesthetic-epinephrine|Drug: Saline Posterior Spine Surgery Mansoura University April 11 2017 Not Applicable
NCT02546947 Completed Other: Train of four monitoring Acute Respiratory Distress Syndrome Centre Chirurgical Marie Lannelongue June 2015 Not Applicable

(data from, updated on 2022-08-01)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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