Racecadotril (acetorphan)

Alias: Acetorphan; Racecadotril
Cat No.:V1278 Purity: ≥98%
Racecadotril (also called acetorphan) is a potent and peripherally acting enkephalinase inhibitor used as an antidiarrheal medication.
Racecadotril (acetorphan) Chemical Structure CAS No.: 81110-73-8
Product category: Opioid Receptor
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
250mg
500mg
1g
2g
5g
Other Sizes

Other Forms of Racecadotril (acetorphan):

  • Racecadotril-d5 (Acetorphan-d5)
Official Supplier of:
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description

Racecadotril (also called acetorphan) is a potent and peripherally acting enkephalinase inhibitor used as an antidiarrheal medication. It has an IC50 of 4.5 μM against enkephalinase and prevents the degradation of endogenous enkephalins. Racecadotril has an antisecretory effect; unlike other opioid medications used to treat diarrhea, it lessens the secretion of water and electrolytes into the intestine while also reducing intestinal motility.

Biological Activity I Assay Protocols (From Reference)
Targets
Opioid receptor
ln Vivo
Racecadotril is quickly converted to Thiorphan in mice after intravenous injection; as a result, 30 minutes after the injection, only Thiorphan is found in the kidney and not the parent compound, Racecadotril[1].
In rats, radioactively labeled racecadotril at a single dose of 10 mg/kg is eliminated in 24 hours in 92% of cases[1].
Racecadotril is an inhibitor of neutral endopeptidase (NEP) that has been shown to have antidiarrheal properties in animals. Racecadotril (100 mg/kg) given orally exhibits effectiveness in a rat model of diarrhea brought on by castor oil[2].
Animal Protocol
6-to-7-week-old male Wistar rats
100 mg/kg
A single oral treatment; 30 minutes before castor oil administration.
References

[1]. A comprehensive review of the pharmacodynamics, pharmacokinetics, and clinical effects of the neutral endopeptidase inhibitor Racecadotril. Front Pharmacol. 2012 May 30;3:93.

[2]. Pharmacologic Comparison of Clinical Neutral Endopeptidase Inhibitors in a Rat Model of Acute Secretory Diarrhea. J Pharmacol Exp Ther. 2016 May;357(2):423-31.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C21H23NO4S
Molecular Weight
385.48
Exact Mass
385.13
Elemental Analysis
C, 65.43; H, 6.01; N, 3.63; O, 16.60; S, 8.32
CAS #
81110-73-8
Related CAS #
Racecadotril-d5; 1246815-11-1
Appearance
Solid powder
SMILES
CC(=O)SCC(CC1=CC=CC=C1)C(=O)NCC(=O)OCC2=CC=CC=C2
InChi Key
ODUOJXZPIYUATO-UHFFFAOYSA-N
InChi Code
InChI=1S/C21H23NO4S/c1-16(23)27-15-19(12-17-8-4-2-5-9-17)21(25)22-13-20(24)26-14-18-10-6-3-7-11-18/h2-11,19H,12-15H2,1H3,(H,22,25)
Chemical Name
benzyl 2-[[2-(acetylsulfanylmethyl)-3-phenylpropanoyl]amino]acetate
Synonyms
Acetorphan; Racecadotril
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: 22~77 mg/mL (57.1~199.8 mM)
Water: <1 mg/mL
Ethanol: ~77 mg/mL (~199.8mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (6.49 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: 2.5 mg/mL (6.49 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (6.49 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.5942 mL 12.9708 mL 25.9417 mL
5 mM 0.5188 mL 2.5942 mL 5.1883 mL
10 mM 0.2594 mL 1.2971 mL 2.5942 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

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What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
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What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution 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 stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Clinical Trial Information
NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT05600062 Recruiting Drug: Placebo
Drug: Racecadotril 100 milligram
(MG) Oral Capsule
Acute Respiratory Distress
Syndrome
Queen Mary University of
London
August 24, 2023 Not Applicable
NCT01577043 Completed Drug: Racecadotril
Drug: Placebo
Acute Diarrhea
Acute Gastroenteritis
Centro Pediatrico Albina de
Patino
September 2011 Phase 4
NCT05216822 Completed Drug: Racecadotril Acute Watery Diarrhea Assiut University June 1, 2018 Phase 1
NCT01153854 Completed Drug: Racecadotril
Drug: Placebo groups
Diarrhea National Institute of
Pediatrics, Mexico
January 2007 Phase 3
NCT03473561 Completed Drug: Racecadotril plus ORS Diarrhea, Infantile Abbott August 25, 2018 Phase 3
Biological Data
  • Incidence of adverse events (upper panel) and rebound constipation (lower panel) in controlled studies with racecadotril in the treatment of acute diarrhea in adults. Front Pharmacol . 2012 May 30:3:93.
  • Incidence of adverse events in controlled studies with racecadotril in the treatment of acute diarrhea in children. Front Pharmacol . 2012 May 30:3:93.
  • PK and PD comparison of sacubitril and racecadotril. J Pharmacol Exp Ther . 2016 May;357(2):423-31.
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