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ChemicalBook >> CAS DataBase List >> Trimethoprim

Trimethoprim

Trimethoprim price.
  • $6 - $2900
  • Product name: Trimethoprim
  • CAS: 738-70-5
  • MF: C14H18N4O3
  • MW: 290.32
  • EINECS:212-006-2
  • MDL Number:MFCD00036761
  • Synonyms:TRIMETHOPRIMRESEARCH GRADE;TRIMETHOPRIMMICRONIZED;5-[(3,4,5-TriMethoxyphenyl)Methyl]-;TriMethopriM COS;TriMethopriM 0;TMP (triMethopriM);Trimethoprim solution,1000ppm;Trimethoprim Solution, 100ppm
139 prices
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  • aablocks
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Package
  • 50mg
  • 100mg
  • 10mM*1mLinDMSO(Solid+Solvent)
  • 25mg
  • 10mM*1mLinDMSO(Solution)
  • 250mg
  • 500mg
  • 300mg
  • y0000684
  • 1ml
  • 1g
  • 500ul
  • t2200000
  • 10mM(in1mLDMSO)
  • 2.5g
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  • 5g
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  • 1 mL
  • 25gm:
  • 50 mg
  • Manufactureraablocks
  • Product numberAA0032W0
  • Product description2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine ≥99%
  • Packaging1g
  • Price$10
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0032W0
  • Product description2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine ≥99%
  • Packaging5g
  • Price$11
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0032W0
  • Product description2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine ≥99%
  • Packaging25g
  • Price$17
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0032W0
  • Product description2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine 98%
  • Packaging100g
  • Price$38
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA0032W0
  • Product description2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine 98%
  • Packaging500g
  • Price$109
  • Updated2026-05-28
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ95120
  • Product description2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95%
  • Packaging500g
  • Price$200
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberH148
  • Product descriptionTrimethoprim 98%
  • Packaging500g
  • Price$280
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ95120
  • Product description2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95%
  • Packaging100g
  • Price$57
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ10046
  • Product descriptionTrimethoprim 99%(HPLC)
  • Packaging1g
  • Price$68
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberH148
  • Product descriptionTrimethoprim 98%
  • Packaging100g
  • Price$80
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ10046
  • Product descriptionTrimethoprim
  • Packaging25mg
  • Price$19.8
  • Updated2021-12-16
  • Buy
  • ManufacturerAK Scientific
  • Product numberH148
  • Product descriptionTrimethoprim 98%
  • Packaging5g
  • Price$16
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ95120
  • Product description2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95%
  • Packaging25g
  • Price$22
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ10046
  • Product descriptionTrimethoprim 99%(HPLC)
  • Packaging100mg
  • Price$28
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberH148
  • Product descriptionTrimethoprim 98%
  • Packaging25g
  • Price$29
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ95120
  • Product description2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95%
  • Packaging5g
  • Price$12
  • Updated2026-06-04
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA0032W0 2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine ≥99% 1g $10 2026-05-28 Buy
aablocks AA0032W0 2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine ≥99% 5g $11 2026-05-28 Buy
aablocks AA0032W0 2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine ≥99% 25g $17 2026-05-28 Buy
aablocks AA0032W0 2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine 98% 100g $38 2026-05-28 Buy
aablocks AA0032W0 2,4-Diamino-5-(3,4,5-Trimethoxybenzyl)Pyrimidine 98% 500g $109 2026-05-28 Buy
AK Scientific J95120 2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95% 500g $200 2026-06-04 Buy
AK Scientific H148 Trimethoprim 98% 500g $280 2026-06-04 Buy
AK Scientific J95120 2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95% 100g $57 2026-06-04 Buy
AK Scientific J10046 Trimethoprim 99%(HPLC) 1g $68 2026-06-04 Buy
AK Scientific H148 Trimethoprim 98% 100g $80 2026-06-04 Buy
AK Scientific J10046 Trimethoprim 25mg $19.8 2021-12-16 Buy
AK Scientific H148 Trimethoprim 98% 5g $16 2026-06-04 Buy
AK Scientific J95120 2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95% 25g $22 2026-06-04 Buy
AK Scientific J10046 Trimethoprim 99%(HPLC) 100mg $28 2026-06-04 Buy
AK Scientific H148 Trimethoprim 98% 25g $29 2026-06-04 Buy
AK Scientific J95120 2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine 95% 5g $12 2026-06-04 Buy

Properties

Melting point :199-203 °C
Boiling point :432.41°C (rough estimate)
Density :1.1648 (rough estimate)
refractive index :1.6000 (estimate)
storage temp. :2-8°C
solubility :DMSO: soluble
form :white powder
pka :6.6(at 25℃)
color :colorless or white
biological source :synthetic
Water Solubility :<0.1 g/100 mL at 24 ºC
Merck :14,9709
BRN :625127
Henry's Law Constant :4.1×108 mol/(m3Pa) at 25℃, HSDB (2015)
BCS Class :2
Stability :Stable. Incompatible with strong oxidizing agents, acids.
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)
InChIKey :IEDVJHCEMCRBQM-UHFFFAOYSA-N
SMILES :COc1cc(Cc2cnc(N)nc2N)cc(OC)c1OC
CAS DataBase Reference :738-70-5(CAS DataBase Reference)
NIST Chemistry Reference :Trimethoprim(738-70-5)
EPA Substance Registry System :Trimethoprim (738-70-5)

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
Precautionary statements:
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P501 Dispose of contents/container to..…

Description

Trimethoprim is a synthetic antibiotic that inhibits dihydrofolate reductase (DHFR), which is necessary for the synthesis of purines, amino acids, and thymidylic acid. Trimethoprim shows prominent selectivity for bacterial DHFR over mammalian DHFR (IC50s = 5 and 30,000 nM, respectively). Trimethoprim, commonly used in combination with sulfamethoxazole to minimize acquired resistance, has long been used against urinary tract infections. It may also have prophylactic applications, for example in patients receiving biologic agents during inflammation.

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