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Polymyxin B2

Also known as Polysporin (TN), Polymyxin B sulphate?

CAS 34503-87-2Formula C55H96N16O13Molar mass 1,189.47 g/mol
Polymyxin B2 chemical structure, C55H96N16O13, CAS 34503-87-2
2D chemical structure

Key facts

What buyers check first

CAS number
34503-87-2
Formula
C55H96N16O13
Molar mass
1,189.47 g/mol
HS code
294190
Category
Peptides

What is Polymyxin B2?

Plain description, key identifiers and synonyms

Polymyxin B2 is a polymyxin.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
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)-15-benzyl-3-[(1R)-1-hydroxyethyl]-12-(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-methylheptanamide
CAS number
34503-87-2 CAS number cross-checked
Molecular formula
C55H96N16O13
UNII
99SJO09VH2
InChIKey
SGPYLFWAQBAXCZ-RUDZPDEXSA-N
InChI
InChI=1S/C55H96N16O13/c1-30(2)12-10-11-15-43(74)62-35(16-22-56)50(79)71-45(33(6)73)55(84)67-38(19-25-59)47(76)66-40-21-27-61-54(83)44(32(5)72)70-51(80)39(20-26-60)64-46(75)36(17-23-57)65-52(81)41(28-31(3)4)68-53(82)42(29-34-13-8-7-9-14-34)69-48(77)37(18-24-58)63-49(40)78/h7-9,13-14,30-33,35-42,44-45,72-73H,10-12,15-29,56-60H2,1-6H3,(H,61,83)(H,62,74)(H,63,78)(H,64,75)(H,65,81)(H,66,76)(H,67,84)(H,68,82)(H,69,77)(H,70,80)(H,71,79)/t32-,33-,35+,36+,37+,38+,39+,40+,41+,42-,44+,45+/m1/s1
Canonical SMILES
CC(C)CCCCC(=O)NC(CCN)C(=O)NC(C(=O)NC(CCN)C(=O)NC1CCNC(=O)C(C(C)O)NC(=O)C(CCN)NC(=O)C(CCN)NC(=O)C(CC(C)C)NC(=O)C(Cc2ccccc2)NC(=O)C(CCN)NC1=O)C(C)O
Isomeric SMILES
C[C@H]([C@H]1C(=O)NCC[C@@H](C(=O)N[C@H](C(=O)N[C@@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N1)CCN)CCN)CC(C)C)CC2=CC=CC=C2)CCN)NC(=O)[C@H](CCN)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CCN)NC(=O)CCCCC(C)C)O

Synonyms

  • Polysporin (TN)
  • Polymyxin B sulphate?

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
1,189.47 g/molcalc.
Exact mass
1,188.7343 Dacalc.
LogP (octanol/water)
-5.63calc.
Topological polar surface area
490.7 Ųcalc.
Hydrogen bond donors
18calc.
Hydrogen bond acceptors
18calc.
Rotatable bonds
28calc.
Heavy atoms
84calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.69calc.
Formal charge
0calc.
Stereocentres
12calc.
Lipinski rule of five
Fails (3 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1CCCNC(=O)CNC(=O)CNC(=O)CNC(=O)CNC(=O)C(Cc2ccccc2)NC(=O)CN1

O=C1CCCNC(=O)CNC(=O)CNC(=O)CNC(=O)CNC(=O)C(Cc2ccccc2)NC(=O)CN1

2 rings, 37 atoms.

33 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Polymyxin B2 suppliers

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All 22 suppliers
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Polymyxin B2 price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Pharmacology

Polymyxin B2 is a polypeptide obtained from Bacillus polymyxa strains with antimicrobial activity. Polymyxin B2 exerts its antimicrobial effect through its cationic detergent action on cell membranes. Specifically, this antibiotic binds to the negatively charged site in the lipopolysaccharide layer of the bacterial cell membrane via electrostatic affinity with the positively charged amino groups in the cyclic peptide portion. Subsequently, the fatty acid portion of polymyxin B2 dissolves in the hydrophobic region of the bacterial cell membrane. This results in an alteration in cell membrane structure, disruption of cell wall integrity and an increase in permeability for water and molecules. This will eventually lead to bacterial cell death.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Polymyxin B2 is traded under.

HS 2941.90Indicative HS code

Antibiotics, other

World exports in 2024
$6.39B
+2.3% vs 2023, imports $6.97B
2019 to 2024
Top exporters
  1. China39.7%
  2. United States11.3%
  3. Switzerland * partner reported10.9%
Top importers
  1. Italy15.0%
  2. India * partner reported12.0%
  3. China8.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Polymyxin B2 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Polymyxin B2, based on the data on this page

What is Polymyxin B2?

Polymyxin B2 is a polymyxin.

What is the CAS number of Polymyxin B2?

The CAS registry number of Polymyxin B2 is 34503-87-2.

What is the molecular formula and weight of Polymyxin B2?

The molecular formula of Polymyxin B2 is C55H96N16O13 and its molar mass is 1,189.47 g/mol.

Is Polymyxin B2 hazardous?

No GHS hazard classification for Polymyxin B2 is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Polymyxin B2?

Polymyxin B2 is usually classified under HS code 294190 (Antibiotics, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Polymyxin B2?

CompoundList lists 22 suppliers of Polymyxin B2 in China, India, United States, Canada and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Polymyxin B2 in India?

4 suppliers in India list Polymyxin B2 on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Polymyxin B2?

Suppliers quote Polymyxin B2 on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Polymyxin B2

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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