2. Anti-infection
  3. Bacterial Antibiotic
  4. Retapamulin

Retapamulin  (Synonyms: SB-275833)

Cat. No.: HY-17010 Purity: ≥98.0%
COA Handling Instructions

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Retapamulin(SB-275833) is a topical antibiotic, which binds to both E.

For research use only. We do not sell to patients.

Retapamulin Chemical Structure

Retapamulin Chemical Structure

CAS No. : 224452-66-8

Size Price Stock Quantity
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Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 117 In-stock
Solution
10 mM * 1 mL in DMSO USD 117 In-stock
Solid
5 mg USD 68 In-stock
10 mg USD 106 In-stock
50 mg USD 140 In-stock
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Based on 2 publication(s) in Google Scholar

Retapamulin Related Antibodies

Top Publications Citing Use of Products

View All Antibiotic Isoform Specific Products:

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Aminoglycoside Glycopeptide Lipopeptide Macrolide Oxazolidinone Quinolone Tetracycline β-lactam

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

Retapamulin(SB-275833) is a topical antibiotic, which binds to both E. coli and S. aureus ribosomes with similar potencies with Kd of 3 nM. IC50 Value: 3 nM(Kd, E.coli) Target: Antibacterial Retapamulin is a topical antibiotic developed by GlaxoSmithKline. Retapamulin(SB-275833) is the first drug in the new class of pleuromutilin antibiotics to be approved for human use.Retapamulin(SB-275833) is marketed as an ointment under the brand names Altabax and Altargo. Retapamulin(SB-275833) is useful for Antibiotics.

Clinical Trial
Molecular Weight

517.76

Formula

C30H47NO4S
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

C[C@@H]1[C@]23[C@](C(CC3)=O)([H])[C@]([C@H](OC(CS[C@@H]4C[C@@H]5N(C)[C@@H](CC5)C4)=O)C[C@](C=C)(C)[C@H]1O)([C@H](C)CC2)C
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

4°C, protect from light

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)

Solvent & Solubility
In Vitro: 

DMSO : 110 mg/mL (212.45 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.9314 mL 9.6570 mL 19.3140 mL
5 mM 0.3863 mL 1.9314 mL 3.8628 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.75 mg/mL (5.31 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.75 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (27.5 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.75 mg/mL (5.31 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.75 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (27.5 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
% 
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light)

The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation

Purity: ≥98.0%

COA (254 KB) HNMR (200 KB)

Handling Instructions (2659 KB)
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 1.9314 mL 9.6570 mL 19.3140 mL 48.2849 mL
5 mM 0.3863 mL 1.9314 mL 3.8628 mL 9.6570 mL
10 mM 0.1931 mL 0.9657 mL 1.9314 mL 4.8285 mL
15 mM 0.1288 mL 0.6438 mL 1.2876 mL 3.2190 mL
20 mM 0.0966 mL 0.4828 mL 0.9657 mL 2.4142 mL
25 mM 0.0773 mL 0.3863 mL 0.7726 mL 1.9314 mL
30 mM 0.0644 mL 0.3219 mL 0.6438 mL 1.6095 mL
40 mM 0.0483 mL 0.2414 mL 0.4828 mL 1.2071 mL
50 mM 0.0386 mL 0.1931 mL 0.3863 mL 0.9657 mL
60 mM 0.0322 mL 0.1609 mL 0.3219 mL 0.8047 mL
80 mM 0.0241 mL 0.1207 mL 0.2414 mL 0.6036 mL
100 mM 0.0193 mL 0.0966 mL 0.1931 mL 0.4828 mL
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Retapamulin Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Retapamulin224452-66-8SB-275833SB275833SB 275833BacterialAntibioticInhibitorinhibitorinhibit

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