Leflunomide EP Impurity C

Name: Leflunomide EP Impurity C
Brand: Vaqora Chemicals
SKU: VQ-022938

About Leflunomide EP Impurity C

Leflunomide EP Impurity C (CAS 61643-23-0) is a pharmacopeial impurity of Leflunomide offered by Vaqora Chemicals. Formula C12H9F3N2O2, molecular weight 270.21 g/mol. Systematically, it is named 5-methyl-N-[3-(trifluoromethyl)phenyl]-1,2-oxazole-4-carboxamide. Alternative names: Leflunomide - Impurity C and Leflunomide Impurity C.

It is supplied as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

As a characterised impurity of Leflunomide, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

We offer Leflunomide EP Impurity C in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Pharmacopeial method verification
Impurity profiling
QC release testing
ANDA / DMF filings

Industries

Related to Leflunomide

View every impurity, metabolite and intermediate we list for Leflunomide.

Leflunomide impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Leflunomide EP Impurity C
Catalogue No.	VQ-022938
CAS Number	61643-23-0
IUPAC name	5-methyl-N-[3-(trifluoromethyl)phenyl]-1,2-oxazole-4-carboxamide
Molecular formula	C₁₂H₉F₃N₂O₂
Molecular weight	270.21 g/mol
Exact mass	270.0616
Grade	Reference Standard
HSN code	38229090
InChIKey	KBFQQKBZIFSAMY-UHFFFAOYSA-N
SMILES	CC1=C(C=NO1)C(=O)NC2=CC=CC(=C2)C(F)(F)F
PubChem CID	7314718

Physical properties
Physical form	Solid
LogP (XLogP3)	2.5
H-bond donors / acceptors	1 / 6
TPSA	55.1 Å²
Synonyms	Leflunomide - Impurity C, 5-Methyl-N-(3-(trifluoromethyl)phenyl)isoxazole-4-carboxamide, 4-Isoxazolecarboxamide, 5-methyl-N-(3-(trifluoromethyl)phenyl)-, 5-Methyl-N-[3-(trifluoromethyl)phenyl]isoxazole-4-carboxamide, Leflunomide Impurity C, Leflunomide 3-Isomer, 5-methyl-N-[3-(trifluoromethyl)phenyl]-4-isoxazolecarboxamide

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Leflunomide EP Impurity C?

The CAS Registry Number of Leflunomide EP Impurity C is 61643-23-0. It is also known as Leflunomide - Impurity C, 5-Methyl-N-(3-(trifluoromethyl)phenyl)isoxazole-4-carboxamide, 4-Isoxazolecarboxamide, 5-methyl-N-(3-(trifluoromethyl)phenyl)-.

What is the molecular formula and molecular weight of Leflunomide EP Impurity C?

Leflunomide EP Impurity C has the molecular formula C12H9F3N2O2 and a molecular weight of 270.21 g/mol. Its IUPAC name is 5-methyl-N-[3-(trifluoromethyl)phenyl]-1,2-oxazole-4-carboxamide.

What is Leflunomide EP Impurity C used for?

Leflunomide EP Impurity C is supplied as a characterised reference material related to Leflunomide. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Leflunomide EP Impurity C can I order?

We supply Leflunomide EP Impurity C in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Leflunomide EP Impurity C?

Yes. Every lot of Leflunomide EP Impurity C is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Leflunomide EP Impurity C be shipped internationally?

Yes. Leflunomide EP Impurity C is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.