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Peptides

Bradykinin

Also known as L-Bradykinin, Kallidin I, Callidin I

CAS 58-82-2Formula C50H73N15O11Molar mass 1,060.23 g/molEC 200-398-8
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Bradykinin chemical structure, C50H73N15O11, CAS 58-82-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
58-82-2
Formula
C50H73N15O11
Molar mass
1,060.23 g/mol
EC number
200-398-8
HS code
293399
Category
Peptides

What is Bradykinin?

Plain description, key identifiers and synonyms

Bradykinin is a linear nonapeptide messenger belonging to the kinin group of proteins, with amino acid sequence RPPGFSPFR. Enzymatically produced from kallidin in the blood, it is a powerful vasodilator that causes smooth muscle contraction, and may mediate inflammation. It has a role as a vasodilator agent and a human blood serum metabolite. It is a conjugate base of a bradykinin(2+).

Bradykinin is a peptide hormone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[2-[[(2S)-1-[(2S)-1-[(2S)-2-amino-5-(diaminomethylideneamino)pentanoyl]pyrrolidine-2-carbonyl]pyrrolidine-2-carbonyl]amino]acetyl]amino]-3-phenylpropanoyl]amino]-3-hydroxypropanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid
CAS number
58-82-2 CAS number cross-checked
EC number
200-398-8
Molecular formula
C50H73N15O11
UNII
S8TIM42R2W
MDL number
MFCD00076258
InChIKey
QXZGBUJJYSLZLT-FDISYFBBSA-N
InChI
InChI=1S/C50H73N15O11/c51-32(16-7-21-56-49(52)53)45(72)65-25-11-20-39(65)47(74)64-24-9-18-37(64)43(70)58-28-40(67)59-34(26-30-12-3-1-4-13-30)41(68)62-36(29-66)46(73)63-23-10-19-38(63)44(71)61-35(27-31-14-5-2-6-15-31)42(69)60-33(48(75)76)17-8-22-57-50(54)55/h1-6,12-15,32-39,66H,7-11,16-29,51H2,(H,58,70)(H,59,67)(H,60,69)(H,61,71)(H,62,68)(H,75,76)(H4,52,53,56)(H4,54,55,57)/t32-,33-,34-,35-,36-,37-,38-,39-/m0/s1
Canonical SMILES
NC(N)=NCCCC(N)C(=O)N1CCCC1C(=O)N1CCCC1C(=O)NCC(=O)NC(Cc1ccccc1)C(=O)NC(CO)C(=O)N1CCCC1C(=O)NC(Cc1ccccc1)C(=O)NC(CCCN=C(N)N)C(=O)O
Isomeric SMILES
C1C[C@H](N(C1)C(=O)[C@@H]2CCCN2C(=O)[C@H](CCCN=C(N)N)N)C(=O)NCC(=O)N[C@@H](CC3=CC=CC=C3)C(=O)N[C@@H](CO)C(=O)N4CCC[C@H]4C(=O)N[C@@H](CC5=CC=CC=C5)C(=O)N[C@@H](CCCN=C(N)N)C(=O)O

Synonyms

  • L-Bradykinin
  • Kallidin I
  • Callidin I
  • Kallidin-9
  • Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg
  • Arg Pro Pro Gly Phe Ser Pro Phe Arg
  • Synthetic bradykinin
  • Kallidin 9
  • Bradykinin (synthetic)
  • Rppgfspfr
  • BRS 640
  • PRS 640
  • Bradykinin Trifluoroacetic Acid
  • L-arginyl-L-prolyl-L-prolylglycyl-L-phenylalanyl-L-seryl-L-prolyl-L-phenylalanyl-L-arginine
  • Arg1-Pro2-Pro3-Gly4-Phe5-Ser6-Pro7-Phe8-Arg9
  • bradykinine
  • [3H]-bradykinin
  • kinin 9
  • L-arginyl-L-prolyl-L-prolylglycyl-L-phenylalanyl-L-seryl-L-prolyl-L-phenylalanyl-L-arginine Trifluoroacetic Acid
  • Bradykinin (8CI,9CI)
  • [3H]BK (human, mouse, rat)
  • [3H]-BK
  • (BK) H-Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg-OH
  • L-Arg-L-Pro-L-Pro-Gly-L-Phe-L-Ser-L-Pro-L-Phe-L-Arg
  • H-L-Arg-L-Pro-L-Pro-Gly-L-Phe-L-Ser-L-Pro-L-Phe-L-Arg-OH
Show all 27 synonyms
  • Arginine, N2-[N-[1-[N-[N-[N-[1-(1-arginyl-L-prolyl)-L-prolyl]glycyl]-3-phenylalanyl]seryl]prolyl]-3-phenylalanyl]- (6CI)
  • L-Arginine, L-arginyl-L-prolyl-L-prolylglycyl-L-phenylalanyl-L-seryl-L-prolyl-L-phenylalanyl-

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
1,060.23 g/molcalc.
Exact mass
1,059.5614 Dacalc.
LogP (octanol/water)
-3.99calc.
Topological polar surface area
418.8 Ųcalc.
Hydrogen bond donors
12calc.
Hydrogen bond acceptors
13calc.
Rotatable bonds
27calc.
Heavy atoms
76calc.
Rings
5calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.54calc.
Formal charge
0calc.
Stereocentres
8calc.
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=C(CNC(=O)C1CCCN1C(=O)C1CCCN1)NC(Cc1ccccc1)C(=O)NCC(=O)N1CCCC1C(=O)NCCc1ccccc1

O=C(CNC(=O)C1CCCN1C(=O)C1CCCN1)NC(Cc1ccccc1)C(=O)NCC(=O)N1CCCC1C(=O)NCCc1ccccc1

5 rings, 49 atoms.

36 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.

Bradykinin suppliers

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All 31 suppliers
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Where suppliers are based

31 suppliers in 9 countries

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Bradykinin 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

Pharmacological actions

  • Vasodilator Agents

Roles

  • animal metabolite
  • cardiovascular drug
  • eukaryotic metabolite
  • human blood serum metabolite
  • human metabolite
  • mammalian metabolite
  • metabolite
  • pharmaceutical
  • vasodilator agent

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 Bradykinin is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Bradykinin, based on the data on this page

What is Bradykinin?

Bradykinin is a linear nonapeptide messenger belonging to the kinin group of proteins, with amino acid sequence RPPGFSPFR. Enzymatically produced from kallidin in the blood, it is a powerful vasodilator that causes smooth muscle contraction, and may mediate inflammation.

What is the CAS number of Bradykinin?

The CAS registry number of Bradykinin is 58-82-2.

What is the molecular formula and weight of Bradykinin?

The molecular formula of Bradykinin is C50H73N15O11 and its molar mass is 1,060.23 g/mol.

What is Bradykinin used for?

Known uses and roles of Bradykinin include animal metabolite, cardiovascular drug, eukaryotic metabolite, human blood serum metabolite, human metabolite and 5 more.

Is Bradykinin hazardous?

No GHS hazard classification for Bradykinin 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 Bradykinin?

Bradykinin is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Bradykinin?

CompoundList lists 31 suppliers of Bradykinin in United States, China, United Kingdom, Hong Kong and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Bradykinin?

Suppliers quote Bradykinin 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 Bradykinin

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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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