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ChemicalBook >> CAS DataBase List >> Leflunomide

Leflunomide

Leflunomide price.
  • $6 - $1504.5
  • Product name: Leflunomide
  • CAS: 75706-12-6
  • MF: C12H9F3N2O2
  • MW: 270.21
  • EINECS:616-254-6
  • MDL Number:MFCD00867593
  • Synonyms:LEFLUNOMIDE;HWA 486;ALPHA,ALPHA,ALPHA-TRIFLUORO-5-METHYL-4-ISOXAZOLECARBOXY-P-TOLUIDIDE;5-METHYLISOXAZOLE-4-(4-TRIFLUOROMETHYLCARBOXANILIDE);5-METHYL-N-[4-(TRIFLUOROMETHYL)PHENYL]-4-ISOXAZOLECARBOXAMIDE;N-(4-TRIFLUOROMETHYLPHENYL)-5-METHYLISOXAZOL-4-CARBOXAMIDE;5-methylisoxazole-4-carboxylicacid(4-trifluoromethyl)anilide ;5-methyl-n-(4-(trifluoromethyl)phenyl)-4-isoxazolecarboxamid
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Package
  • 200MG
  • 500mg
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  • 10mM*1mLinDMSO(Solution)
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  • 10mM(in 1mL DMSO)
  • 10mM*1mLinDMSO(Solid+Solvent)
  • y0000674
  • y0000654
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  • 10mM(in1mLDMSO)
  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging1mg
  • Price$8
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging10mg
  • Price$10
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide ≥98%
  • Packaging50mg
  • Price$10
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging100mg
  • Price$16
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging250mg
  • Price$22
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging1g
  • Price$36
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging5g
  • Price$76
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA005IR9
  • Product descriptionLeflunomide 98%
  • Packaging25g
  • Price$352
  • Updated2026-05-28
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  • ManufacturerACHEMBLOCK
  • Product numberZ238165
  • Product descriptionLeflunomide 98%
  • Packaging25G
  • Price$375
  • Updated2026-05-27
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  • ManufacturerACHEMBLOCK
  • Product numberZ238165
  • Product descriptionLeflunomide 98%
  • Packaging5G
  • Price$120
  • Updated2026-05-27
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  • ManufacturerAHH
  • Product numberAPI-1149
  • Product descriptionLeflunomide 98%
  • Packaging10g
  • Price$660
  • Updated2021-12-16
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  • ManufacturerAHH
  • Product numberAPI-1149
  • Product descriptionLeflunomide 97%
  • Packaging10g
  • Price$660
  • Updated2026-05-26
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  • ManufacturerAK Scientific
  • Product numberH527
  • Product descriptionLeflunomide 98%(HPLC)
  • Packaging25g
  • Price$988
  • Updated2026-06-04
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  • ManufacturerAK Scientific
  • Product numberH527
  • Product descriptionLeflunomide 98%(HPLC)
  • Packaging5g
  • Price$247
  • Updated2026-06-04
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  • ManufacturerAK Scientific
  • Product numberJ40005
  • Product descriptionLeflunomide
  • Packaging25mg
  • Price$76.5
  • Updated2021-12-16
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  • ManufacturerAK Scientific
  • Product numberH527
  • Product descriptionLeflunomide
  • Packaging100mg
  • Price$70
  • Updated2021-12-16
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA005IR9 Leflunomide 98% 1mg $8 2026-05-28 Buy
aablocks AA005IR9 Leflunomide 98% 10mg $10 2026-05-28 Buy
aablocks AA005IR9 Leflunomide ≥98% 50mg $10 2026-05-28 Buy
aablocks AA005IR9 Leflunomide 98% 100mg $16 2026-05-28 Buy
aablocks AA005IR9 Leflunomide 98% 250mg $22 2026-05-28 Buy
aablocks AA005IR9 Leflunomide 98% 1g $36 2026-05-28 Buy
aablocks AA005IR9 Leflunomide 98% 5g $76 2026-05-28 Buy
aablocks AA005IR9 Leflunomide 98% 25g $352 2026-05-28 Buy
ACHEMBLOCK Z238165 Leflunomide 98% 25G $375 2026-05-27 Buy
ACHEMBLOCK Z238165 Leflunomide 98% 5G $120 2026-05-27 Buy
AHH API-1149 Leflunomide 98% 10g $660 2021-12-16 Buy
AHH API-1149 Leflunomide 97% 10g $660 2026-05-26 Buy
AK Scientific H527 Leflunomide 98%(HPLC) 25g $988 2026-06-04 Buy
AK Scientific H527 Leflunomide 98%(HPLC) 5g $247 2026-06-04 Buy
AK Scientific J40005 Leflunomide 25mg $76.5 2021-12-16 Buy
AK Scientific H527 Leflunomide 100mg $70 2021-12-16 Buy

Properties

Melting point :166.5 °C
Boiling point :289.3±40.0 °C(Predicted)
Density :1.392±0.06 g/cm3(Predicted)
storage temp. :2-8°C
solubility :Practically insoluble in water, freely soluble in methanol, sparingly soluble in methylene chloride.
form :Solid
pka :10.8(at 25℃)
color :White
Merck :14,5432
Henry's Law Constant :8.0×104 mol/(m3Pa) at 25℃, HSDB (2015)
Stability :Stable for 2 years from date of purchase as supplied. Solutions in DMSO or ethanol may be stored at -20° for up to 1 month.
Major Application :pharmaceutical
pharmaceutical small molecule InChI :1S/C12H9F3N2O2/c1-7-10(6-16-19-7)11(18)17-9-4-2-8(3-5-9)12(13,14)15/h2-6H,1H3,(H,17,18)
InChIKey :VHOGYURTWQBHIL-UHFFFAOYSA-N
SMILES :Cc1oncc1C(=O)Nc2ccc(cc2)C(F)(F)F
CAS DataBase Reference :75706-12-6(CAS DataBase Reference)

Safety Information

Symbol(GHS): Skull and Crossbones (GHS06)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P302+P352 IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Description

Leflunomide is a synthetic isoxazol derivative that regulates T lymphocyte progression through the cell cycle by selectively inhibiting de novo pyrimidine synthesis. As a prodrug, it is rapidly converted to its active open ring metabolite, A-771726 , which inhibits human lymphocyte proliferation with an IC50 value of 12.5 μM, in vitro. Leflunomide has been evaluated in phase II and III clinical trials for efficacy in slowing the disease progression of rheumatoid arthritis. It has also been used as an immunosuppressant agent to prevent rejection of transplant allografts and xenografts.

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