Niclosamide

Name: Niclosamide
Brand: Vaqora Chemicals
SKU: VQ-003977

About Niclosamide

Vaqora Chemicals supplies Niclosamide (IP/BP/USP grade), an anti-infective API registered under CAS number 50-65-7 with a typical assay of 99%. With the molecular formula C13H8Cl2N2O4, it has a molar mass of 327.12 g/mol. The IUPAC name is 5-chloro-N-(2-chloro-4-nitrophenyl)-2-hydroxybenzamide. It is also known as Bayluscid or 2′,5-Dichloro-4′-nitrosalicylanilide.

The material typically appears as a yellowish powder. Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

As an active pharmaceutical ingredient within our antiviral, antifungal and antiparasitic APIs range, it is offered in IP/BP/USP grade for formulation development, generic drug programmes and commercial manufacturing. Typical end-use sectors are pharmaceutical manufacturing.

Standard pack sizes are 1 kg, 5 kg and 25 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Anti-infective formulations
Generic drug development
Formulation R&D

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Niclosamide
Catalogue No.	VQ-003977
CAS Number	50-65-7
IUPAC name	5-chloro-N-(2-chloro-4-nitrophenyl)-2-hydroxybenzamide
Molecular formula	C₁₃H₈Cl₂N₂O₄
Molecular weight	327.12 g/mol
Exact mass	325.9861
Grade	IP/BP/USP
Purity / assay	99%
HSN code	2933
InChIKey	RJMUSRYZPJIFPJ-UHFFFAOYSA-N
SMILES	C1=CC(=C(C=C1[N+](=O)[O-])Cl)NC(=O)C2=C(C=CC(=C2)Cl)O
PubChem CID	4477

Physical properties
Physical form	Powder
Appearance	Yellowish powder
LogP (XLogP3)	4
H-bond donors / acceptors	2 / 4
TPSA	95.2 Å²
Synonyms	Bayluscid, 2′,5-Dichloro-4′-nitrosalicylanilide, 2-Hydroxy-5-chloro-N-(2-chloro-4-nitrophenyl)benzamide, 5-Chloro-2′-chloro-4′-nitrosalicylanilide, 5-Chloro-N-(2-chloro-4-nitrophenyl)salicylamide, Niclocide, Tredemine, Fenasal, Phenasal, Devermin, Devermine, Helmiantin

Safety & hazard information (GHS)

Environmental hazard

Signal word: Warning

Hazard statements

H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary statements: P273, P391, 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

Other grades of CAS 50-65-7

Niclosamide, 98%

CAS: 50-65-7
Formula: C₁₃H₈Cl₂N₂O₄
MW: 327.12 g/mol

VQ-003742

Frequently asked questions

What is the CAS number of Niclosamide?

The CAS Registry Number of Niclosamide is 50-65-7. It is also known as Bayluscid, 2′,5-Dichloro-4′-nitrosalicylanilide, 2-Hydroxy-5-chloro-N-(2-chloro-4-nitrophenyl)benzamide.

What is the molecular formula and molecular weight of Niclosamide?

Niclosamide has the molecular formula C13H8Cl2N2O4 and a molecular weight of 327.12 g/mol. Its IUPAC name is 5-chloro-N-(2-chloro-4-nitrophenyl)-2-hydroxybenzamide.

Which grade and pack sizes of Niclosamide can I order?

We supply Niclosamide in IP/BP/USP (99%) grade, in 1 kg, 5 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Niclosamide?

Yes. Every lot of Niclosamide 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 Niclosamide be shipped internationally?

Yes. Niclosamide 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.