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B5507 Sigma-Aldrich

Bleomycin sulfate from Streptomyces verticillus

crystalline, 1.5-2.0 U/mg

Synonym: Blenoxane, Bleo, Blexane



Related Categories Antibiotics, Antibiotics A to Z, Antibiotics by Application, Antibiotics by Mechanism of Action, Antibiotics  A-F,
Quality Level   200
form   crystalline
color   white
solubility   H2O: 20 mg/mL
cation traces   Cu: ≤0.10%
Mode of action   DNA synthesis | interferes
antibiotic activity spectrum   fungi
storage temp.   2-8°C
SMILES string   [O-]S([O-])(=O)=O.C[C@@H](O)[C@@H](NC(=O)[C@@H](C)[C@H](O)[C@@H](C)NC(=O)[C@H](NC(=O)c1nc(nc(N)c1C)[C@H](CC(N)=O)NC[C@H](N)C(N)=O)[C@@H](O[C@@H]2O[C@@H](CO)[C@@H](O)[C@H](O)[C@@H]2O[C@@H]3O[C@H](CO)[C@@H](O)[C@@H](OC(N)=O)[C@@H]3O)c4c[nH]cn4)C(=O)NCCc5nc(cs5)-c6ncc(s6)C(=O)NCCC[S+](C)C.C[C@@H](O)[C@@H](NC(=O)[C@@H](C)[C@H](O)[C@@H](C)NC(=O)[C@H](NC(=O)c7nc(nc(N)c7C)[C@H](CC(N)=O)NC[C@H](N)C(N)=O)[C@@H](O[C@@H]8O[C@@H](CO)[C@@H](O)[C@H](O)[C@@H]8O[C@@H]9O[C@H](CO)[C@@H](O)[C@@H](OC(N)=O)[C@@H]9O)c%10c[nH]cn%10)C(=O)NCCc%11nc(cs%11)-c%12ncc(s%12)C(=O)NCCC[S+](C)C
InChI   1S/2C55H83N17O21S3.H2O4S/c2*1-20-33(69-46(72-44(20)58)25(12-31(57)76)64-13-24(56)45(59)82)50(86)71-35(41(26-14-61-19-66-26)91-54-43(39(80)37(78)28(16-73)90-54)92-53-40(81)42(93-55(60)88)38(79)29(17-74)89-53)51(87)67-22(3)36(77)21(2)47(83)70-34(23(4)75)49(85)63-10-8-32-68-27(18-94-32)52-65-15-30(95-52)48(84)62-9-7-11-96(5)6;1-5(2,3)4/h2*14-15,18-19,21-25,28-29,34-43,53-54,64,73-75,77-81H,7-13,16-17,56H2,1-6H3,(H13-,57,58,59,60,61,62,63,66,67,69,70,71,72,76,82,83,84,85,86,87,88);(H2,1,2,3,4)/t2*21-,22+,23+,24-,25-,28-,29+,34+,35+,36-,37+,38+,39-,40-,41-,42+,43-,53-,54-;/m00./s1


General description

Bleomycin Sulfate is an antineoplastic antibiotic isolated from Streptomyces verticillus. It is recommended for use as a cell culture agent at 10-100 μg/mL.

Chemical structure: glycopeptide


Bleomycin sulfate from Streptomyces verticillus has been used:
• to study the impact of telomere shortening in lung fibrosis
• to induce lung injury and study its effect on CEACAM6 expression
• as a DNA-alkylating agent to induce lung injury
• study its effect on CEACAM6 expression
• to cause lung injury
• subsequent fibrosis in animals


15 units in serum bottle

Biochem/physiol Actions

Bleomycin sulfate binds to DNA, causes ssDNA scission at specific base sequences and inhibits DNA synthesis. This inhibitory action requires bleomycin to bind oxygen and a metal ion. It can also cleave RNA, to a lesser degree but more selectively. It acts as an inducer and regulator of apoptosis and inhibits tumor angiogenesis.

Features and Benefits

This compound is a featured product for Apoptosis research. Click here to discover more featured Apoptosis products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.


This product is a mixture of glycopeptides antibiotics containing Bleomycin A2 (70%) and B2(30%). Bleomycins differ from each other in the terminal amine and show varying biological activity.


This product should be stored at 2-8°C.

Preparation Note

The product is soluble in water in water at 20 mg/mL and is active for several days. A solution of 2 units/mL in 0.1 M neutral potassium phosphate should be used within 14 days. A solution is active for three months at 3 units/mL in normal saline.

Other Notes

Keep container tightly closed in a dry and well-ventilated place, strongly hygroscopic

Safety & Documentation

Safety Information

GHS08  GHS08
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


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Damage to cellular DNA is involved in mutagenesis and the development of cancer. The DNA in a human cell undergoes several thousand to a million damaging events per day, generated by both external (e...
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Discover Bioactive Small Molecules for Apoptosis

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Discover Bioactive Small Molecules for Cell Cycle Research

In proliferating cells, the cell cycle consists of four phases. Gap 1 (G1) is the interval between mitosis and DNA replication that is characterized by cell growth. Replication of DNA occurs during t...
Keywords: Apoptosis, Bioactive small molecules, Cancer, Cell division, Cell proliferation, DNA replication, Diseases, Genetic

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