Molecular Weight: 380.40 g/mol

Trimethoprim (lactate) Chemical Structure
Chemical Structure
Check the Trimethoprim (lactate) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 76 mg/mL (199.78 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water 36.5 mg/mL (超声加热五分钟 )
Ethanol 12 mg/mL
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).

Chemical Information

IUPAC Name 2-hydroxypropanoic acid;5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine
CAS Number 23256-42-0
Molecular Formula

C14H18N4O3.C3H6O3

Molecular Weight (MW) 380.40
InChIKey IIZVTUWSIKTFKO-UHFFFAOYSA-N
Note: Technical data last updated: Sep 1, 2026.