Colistin III

Name: Colistin III
Brand: Vaqora Chemicals
SKU: VQ-047866

About Colistin III

Listed under CAS 1271111-95-5, Colistin III is a process intermediate or related compound of Colistin available from Vaqora Chemicals. With the molecular formula C53H100N16O13, it has a molar mass of 1169.5 g/mol. Common synonyms include Circulin A and Circulin A (Bacillus circulans).

The product is provided as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. Handle it with standard laboratory precautions and appropriate personal protective equipment.

Process chemists and analysts use it when developing synthetic routes to Colistin, tracking process-related impurities and validating analytical methods. It is used across pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Colistin III is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

API route development
Impurity fate & purge studies
Analytical method development

Industries

Related to Colistin

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

Colistin impurities

Specifications & identifiers

Chemical identifiers
Product name	Colistin III
Catalogue No.	VQ-047866
CAS Number	1271111-95-5
IUPAC name	(6S)-N-[(2S)-4-amino-1-[[(2S,3R)-1-[[(2S)-4-amino-1-oxo-1-[[(3S,6S,9S,12S,15R,18S,21S)-6,9,18-tris(2-aminoethyl)-12-[(2S)-butan-2-yl]-3-[(1R)-1-hydroxyethyl]-15-(2-methylpropyl)-2,5,8,11,14,17,20-heptaoxo-1,4,7,10,13,16,19-heptazacyclotricos-21-yl]amino]butan-2-yl]amino]-3-hydroxy-1-oxobutan-2-yl]amino]-1-oxobutan-2-yl]-6-methyloctanamide
Molecular formula	C₅₃H₁₀₀N₁₆O₁₃
Molecular weight	1169.5 g/mol
Exact mass	1168.7656
HSN code	2933
InChIKey	CQLCVUOURZVYSE-DWPOUDBJSA-N
SMILES	CC[C@H](C)CCCCC(=O)N[C@@H](CCN)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCN)C(=O)N[C@H]1CCNC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@H](NC(=O)[C@@H](NC1=O)CCN)CC(C)C)[C@@H](C)CC)CCN)CCN)[C@@H](C)O
PubChem CID	124220553

Physical properties
Physical form	Solid
LogP (XLogP3)	-2.8
H-bond donors / acceptors	18 / 18
TPSA	491 Å²

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 Colistin III?

The CAS Registry Number of Colistin III is 1271111-95-5. It is also known as Circulin A, Circulin A (Bacillus circulans).

What is the molecular formula and molecular weight of Colistin III?

Colistin III has the molecular formula C53H100N16O13 and a molecular weight of 1169.5 g/mol.

What is Colistin III used for?

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

We supply Colistin III, 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 Colistin III?

Yes. Every lot of Colistin III 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 Colistin III be shipped internationally?

Yes. We export Colistin III worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.