CAS No. 72559-06-9
Batch:
Purity:99.99
Chemical Structure
Check the
Rifabutin (LM427)
product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.
Chemical Information
| IUPAC Name | [2,15,17,32-tetrahydroxy-11-methoxy-3,7,12,14,16,18,22-heptamethyl-1'-(2-methylpropyl)-6,23-dioxospiro[8,33-dioxa-24,27,29-triazapentacyclo[23.6.1.14,7.05,31.026,30]tritriaconta-1(31),2,4,9,19,21,25(32),26,29-nonaene-28,4'-piperidine]-13-yl] acetate | |
|---|---|---|
| CAS Number | 72559-06-9 | |
| Molecular Formula |
C46H62N4O11 |
|
| Molecular Weight (MW) | 847 | |
| SMILES | CC1C=CC=C(C(=O)N=C2C(=C3C(=C4C2=NC5(N4)CCN(CC5)CC(C)C)C6=C(C(=C3O)C)OC(C6=O)(OC=CC(C(C(C(C(C(C1O)C)O)C)OC(=O)C)C)OC)C)O)C | |
| InChIKey | AZFBLLCNOQPJGJ-UHFFFAOYSA-N |
Biological Activity
Rifabutin (LM427) is a semisynthetic ansamycin antibiotic that acts as a potent inhibitor of bacterial DNA-dependent RNA polymerase. By binding to bacterial RNA polymerase, it suppresses the initiation of RNA chain formation, resulting in the inhibition of RNA transcription and synthesis. This suppression of transcription disrupts bacterial protein expression, leading to potent antimycobacterial activity against Mycobacterium species. [1]
How to Prepare Stock Solution?
|
Concentration
Volume
Mass
|
|---|
Solubility
Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
| Solvent | Solubility & Note |
|---|---|
| DMSO |
100 mg/mL
(118.06 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.) |
| Ethanol | 100 mg/mL |
| Water | Insoluble |
| DMSO |
60 mg/mL
(70.83 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.) |
| Ethanol | 40 mg/mL |
| Water | Insoluble |
| DMSO |
100 mg/mL
(118.06 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.) |
| Ethanol | 100 mg/mL |
| Water | Insoluble |
| DMSO |
100 mg/mL
(118.06 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.) |
| Ethanol | 100 mg/mL |
| Water | Insoluble |
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
- Preheat media/saline to 37°C.
- Mix rapidly (pipette/vortex) upon addition.
- For complex mixes, always add the aqueous phase last.
- Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).
Pre-aliquoted for Longevity: Solid-state aliquots offer longer shelf life compared to stock solutions.
Looking for a specific aliquot size? Contact your local sales representative or orders@selleckchem.com.
Reference
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Note: Technical data last updated: Sep 1, 2026.