Montelukast

Name: Montelukast
Brand: Vaqora Chemicals
SKU: VQ-004178

About Montelukast

Montelukast is a respiratory / antiallergic API (IP/BP/USP grade) carrying the CAS registry number 158966-92-8, specified at ≥99.0% purity. The compound has the formula C35H36ClNO3S, corresponding to a molecular weight of 586.2 g/mol. It is also known as cis-Montelukast or Montelukast (INN).

The material typically appears as a white or off-white powder. Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

As an active pharmaceutical ingredient within our respiratory and antiallergic 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

Pharmaceutical formulation
Generic drug development

Industries

Related to Montelukast

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

Montelukast impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Montelukast
Catalogue No.	VQ-004178
CAS Number	158966-92-8
IUPAC name	2-[1-[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(2-hydroxypropan-2-yl)phenyl]propyl]sulfanylmethyl]cyclopropyl]acetic acid
Molecular formula	C₃₅H₃₆ClNO₃S
Molecular weight	586.2 g/mol
Exact mass	585.2104
Grade	IP/BP/USP
Purity / assay	≥99.0%
HSN code	2933
InChIKey	UCHDWCPVSPXUMX-TZIWLTJVSA-N
SMILES	CC(C)(C1=CC=CC=C1CC[C@H](C2=CC=CC(=C2)/C=C/C3=NC4=C(C=CC(=C4)Cl)C=C3)SCC5(CC5)CC(=O)O)O
PubChem CID	5281040

Physical properties
Physical form	Powder
Appearance	White or off-white powder
LogP (XLogP3)	7.7
H-bond donors / acceptors	2 / 5
TPSA	95.7 Å²
Synonyms	cis-Montelukast, Montelukast (INN), Montelukast racemate, C35H36ClNO3S, Brondilat (TN), MK0476 (free acid), ?-Hydroxy montelukast, Montelukast (Standard), Montelukast - Bio-X trade mark

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H332Harmful if inhaled

Precautionary statements: P261, P264, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P317, P321, P330, P362 + P364, 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 158966-92-8

Reference Standard

Montelukast

CAS: 158966-92-8
Formula: C₃₅H₃₆ClNO₃S
MW: 586.2 g/mol

In stock

Frequently asked questions

What is the CAS number of Montelukast?

The CAS Registry Number of Montelukast is 158966-92-8. It is also known as cis-Montelukast, Montelukast (INN), Montelukast racemate.

What is the molecular formula and molecular weight of Montelukast?

Montelukast has the molecular formula C35H36ClNO3S and a molecular weight of 586.2 g/mol. Its IUPAC name is 2-[1-[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(2-hydroxypropan-2-yl)phenyl]propyl]sulfanylmethyl]cyclopropyl]acetic acid.

What is Montelukast used for?

Montelukast is supplied as a characterised reference material related to Montelukast. 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 Montelukast can I order?

We supply Montelukast in IP/BP/USP (≥99.0%) 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 Montelukast?

Yes. Every lot of Montelukast 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 Montelukast be shipped internationally?

Yes. Montelukast 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.