CAS No. 144-82-1

Batch: Purity:99.92
Sulfamethizole  Chemical Structure
Chemical Structure
Check the Sulfamethizole product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

CAS Number 144-82-1
Molecular Formula

C9H10N4O2S2

Molecular Weight (MW) 270.33
SMILES CC1=NN=C(S1)NS(=O)(=O)C2=CC=C(C=C2)N

Ordering Information

Biological Activity

Sulfamethizole is a sulfonamide antibacterial agent that acts as a competitive inhibitor of bacterial dihydropteroate synthetase (DHPS) by competing with para-aminobenzoic acid (PABA). By blocking DHPS activity, sulfamethizole disrupts the bacterial folate synthesis pathway, thereby preventing the downstream production of purines, pyrimidines, and amino acids required for nucleic acid and protein synthesis. Consequently, this inhibition leads to the suppression of bacterial DNA replication and cell proliferation. [1]

How to Prepare Stock Solution?

Concentration Volume Mass
🧮 Molarity Calculator

Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 54 mg/mL (199.75 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 10 mg/mL
Water Insoluble
FAQ
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).

Aliquotting Service

Free Aliquotting Service

Pre-aliquoted for Longevity: Solid-state aliquots offer significantly longer shelf life compared to stock solutions, ensuring maximum stability for every use.

Looking for a specific aliquot size? Reach out to your local sales representative or contact us at orders@selleckchem.com.

Note: Technical data last updated: Sep 1, 2026.