Impurity Reference Standard - Products

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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Methylene Blue and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Methylene Blue impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Methylene Blue-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

Methylene Blue

CAT No: CL-MYB-01 CAS No: 122965-43-9 Mol Wt: 284.4 : 35.5 : 18.0 Mol F: C16H18N3S : Cl : H2O Inv Status: Custom Synthesis

Chemical Name: 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride hydrate

Methylene Blue Impurity 1

CAT No: CL-MYB-02 CAS No: NA Mol Wt: 318.8 : 35.5 Mol F: C16H17ClN3S : Cl Inv Status: Custom Synthesis

Chemical Name: 1-Chloro-3,7-bis(dimethylamino)phenothiazin-5-ium chloride

Methylene Blue Impurity 2

CAT No: CL-MYB-03 CAS No: 65517-31-9 Mol Wt: 232.3 Mol F: C8H12N2O2S2 Inv Status: Custom Synthesis

Chemical Name: 2-Amino-5-(dimethylamino)benzenesulfonothioic O-acid

Benzoyl Leuco Methylene Blue

CAT No: CL-MYB-04 CAS No: 1249-97-4 Mol Wt: 389.5 Mol F: C23H23N3OS Inv Status: Custom Synthesis

Chemical Name: (3,7-Bis(dimethylamino)-10H-phenothiazin-10-yl)(phenyl)methanone

Hydroxy Methylene Blue

CAT No: CL-MYB-05 CAS No: NA Mol Wt: 301.4 Mol F: C16H19N3OS Inv Status: Custom Synthesis

Chemical Name: 3,7-Bis(dimethylamino)-10H-phenothiazin-10-ol

Leucomethylene Blue

CAT No: CL-MYB-06 CAS No: 613-11-6 Mol Wt: 285.4 Mol F: C16H19N3S Inv Status: Custom Synthesis

Chemical Name: N3,N3,N7,N7-Tetramethyl-10H-phenothiazine-3,7-diamine

Methylene Blue Impurity 3

CAT No: CL-MYB-07 CAS No: 43035-11-6 Mol Wt: 248.3 Mol F: C8H12N2O3S2 Inv Status: Custom Synthesis

Chemical Name: S-(2-Amino-5-(dimethylamino)phenyl) O-hydrogen sulfurothioate

Methylene Blue Impurity 4

CAT No: CL-MYB-08 CAS No: 1698876-57-1 Mol Wt: 365.5 Mol F: C16H19N3O3S2 Inv Status: Custom Synthesis

Chemical Name: S-(5-(Dimethylamino)-2-((4-(dimethyliminio)cyclohexa-2,5-dien-1-ylidene)amino)phenyl) sulfurothioate

Methylene Blue Impurity 5

CAT No: CL-MYB-09 CAS No: NA Mol Wt: 257.3 : 35.5 Mol F: C14H13N2OS : Cl Inv Status: Custom Synthesis

Chemical Name: 3-(Dimethylamino)-7-hydroxyphenothiazin-5-ium chloride

Methylene Violet

CAT No: CL-MYB-10 CAS No: [2516-05-4] Mol Wt: 256.3 Mol F: C14H12N2OS Inv Status: Custom Synthesis

Chemical Name: 7-(Dimethylamino)-3H-phenothiazin-3-one

Thionine Chloride

CAT No: CL-MYB-11 CAS No: 581-64-6 Mol Wt: 228.3 : 35.5 Mol F: C12H10N3S : Cl Inv Status: Custom Synthesis

Chemical Name: 3,7-Diaminophenothiazin-5-ium chloride

Thiosulfonic Acid Bindschedler Green (V)

CAT No: CL-MYB-12 CAS No: 15967-15-4 Mol Wt: 365.5 Mol F: C16H19N3O3S2 Inv Status: Custom Synthesis

Chemical Name: (Z)-S-(6-((4-(dimethylamino)phenyl)imino)-3-(dimethyliminio)cyclohexa-1,4-dien-1-yl) sulfothioate

Azure A Impurity

CAT No: CL-MYB-13 CAS No: 531-53-3 Mol Wt: 256.3 : 35.5 Mol F: C14H14N3S : Cl Inv Status: Custom Synthesis

Chemical Name: 3-Amino-7-(dimethylamino)phenothiazin-5-ium chloride

Azure A Isomer

CAT No: CL-MYB-14 CAS No: 34185-21-2 Mol Wt: 256.3 : 35.5 Mol F: C14H14N3S : Cl Inv Status: Custom Synthesis

Chemical Name: 3,7-Bis(methylamino)phenothiazin-5-ium chloride

Azure B Impurity

CAT No: CL-MYB-15 CAS No: 531-55-5 Mol Wt: 270.4 : 35.5 Mol F: C15H16N3S : Cl Inv Status: Custom Synthesis

Chemical Name: 3-(Dimethylamino)-7-(methylamino)phenothiazin-5-ium chloride

Azure C Impurity

CAT No: CL-MYB-16 CAS No: 531-57-7 Mol Wt: 242.3 : 35.5 Mol F: C13H12N3S : Cl Inv Status: Custom Synthesis

Chemical Name: 3-Amino-7-(methylamino)phenothiazin-5-ium chloride

Type:Impurity Reference Standard

Total Products: 16

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