Solutions prepared in DMSO at 50 mg/mL may be stored in working aliquots at -20°C for up to 1 year. Avoid repeated freeze/thaw cycles.
92131
Trimethoprim
≥99.0% (HPLC)
Promotion Available
Synonym(s):
2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine, NSC 106568
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| Size/SKU | Availability | Price |
|---|---|---|
1 g | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $50.90 |
5 g | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $177.00 |
25 g | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $698.00 |
About This Item
Empirical Formula (Hill Notation):
C14H18N4O3
CAS Number:
Molecular Weight:
290.32
UNSPSC Code:
51285203
NACRES:
NA.85
PubChem Substance ID:
EC Number:
212-006-2
Beilstein/REAXYS Number:
625127
MDL number:
biological source
synthetic
Quality Segment
assay
≥99.0% (HPLC)
form
powder
color
white to light yellow
mp
≥199.0 °C
antibiotic activity spectrum
Gram-negative bacteria, Gram-positive bacteria, mycobacteria
mode of action
DNA synthesis | interferes, enzyme | inhibits
storage temp.
2-8°C
SMILES string
COc1cc(Cc2cnc(N)nc2N)cc(OC)c1OC
InChI
1S/C14H18N4O3/c1-19-10-5-8(6-11(20-2)12(10)21-3)4-9-7-17-14(16)18-13(9)15/h5-7H,4H2,1-3H3,(H4,15,16,17,18)
InChI key
IEDVJHCEMCRBQM-UHFFFAOYSA-N
Gene Information
human ... DHFRP1(573971), KCNH1(3756)
rat ... Dhfr(24312)
General description
Chemical structure: pyrimidine
Application
Trimethoprim is primarily used as an antibacterial agent. It is used in susceptibility studies of Mycobacterium tuberculosis and mechanism of resistance studies in Haemophilus influenzae .
Primarily used as an antibacterial agent. Dihydrofolate reductase inhibitor with selectivity for the prokaryote enzyme.
Biochem/physiol Actions
Inhibits the synthesis of tetrahydrofolate by procaryote specific dihydrofolate reductase (DHFR).
Trimethoprim is a dihydrofolate reductase inhibitor with selectivity for the prokaryote enzyme.
Packaging
1g,5g,25g
Other Notes
Keep container tightly closed in a dry and well-ventilated place.Light sensitive. Store under inert gas. Moisture sensitive. Product is sensitive to light and moisture.
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This Item | |||
|---|---|---|---|
| description ≥99.0% (HPLC) | description ≥98.5% | description VETRANAL®, analytical standard | description certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland |
| mode of action enzyme | inhibits, DNA synthesis | interferes | mode of action DNA synthesis | interferes, enzyme | inhibits | mode of action DNA synthesis | interferes, enzyme | inhibits | mode of action - |
| antibiotic activity spectrum Gram-positive bacteria, Gram-negative bacteria, mycobacteria | antibiotic activity spectrum mycobacteria, Gram-negative bacteria, Gram-positive bacteria | antibiotic activity spectrum mycoplasma, Gram-negative bacteria, Gram-positive bacteria | antibiotic activity spectrum - |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 300 |
| form powder | form powder | form - | form - |
| assay ≥99.0% (HPLC) | assay ≥98.5% | assay - | assay - |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C |
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signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Repr. 2
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Upon dilution in DMSO, what is the best storage condition for trimethoprim (fridge/freezer, how long is it stable for)?
1 answer-
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Is Trimethoprim soluble in DMSO or water?
1 answer-
The solubility of this product is not analyzed on a lot-to-lot basis. The compound is expected to be soluble in water at 0.4 mg/ml, ethanol at 2.6 mg/ml, methanol at 12.1 mg/ml, chloroform at 22.2 mg/ml, and DMSO at 50 mg/ml.
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What is the Department of Transportation shipping information for this product?
1 answer-
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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Is Trimethoprim stable in solution?
1 answer-
Triemethoprim in a solution of 52% N,N dimethylacetamide:48% propylene glycol at 50 mg/ml is stable when stored at 25° C. There is only a 10% degradation of trimethoprim under these conditions after 885 days.
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