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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Cimetidine and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Cimetidine 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 Cimetidine-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.

N-Nitroso Cimetidine A
CAT No: CL-CMTD-NO-01 CAS No: NA Mol Wt: 281.34 Mol F: C10H15N7OS Inv Status: Custom Synthesis
Chemical Name: (E)-2-cyano-1-methyl-3-(2-(((5-methyl-1-nitroso-1H-imidazol-4-yl)methyl)thio)ethyl)guanidine
N-Nitroso Cimetidine B
CAT No: CL-CMTD-NO-02 CAS No: NA Mol Wt: 281.34 Mol F: C10H15N7OS Inv Status: Custom Synthesis
Chemical Name: (E)-2-cyano-3-methyl-1-(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)-1-nitrosoguanidine
N-Nitroso Cimetidine C
CAT No: CL-CMTD-NO-03 CAS No: NA Mol Wt: 281.34 Mol F: C10H15N7OS Inv Status: Custom Synthesis
Chemical Name: (Z)-2-cyano-1-methyl-3-(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)-1-nitrosoguanidine
N-Nitroso Cimetidine D
CAT No: CL-CMTD-NO-04 CAS No: NA Mol Wt: 310.34 Mol F: C10H14N8O2S Inv Status: Custom Synthesis
Chemical Name: (E)-2-cyano-3-methyl-1-(2-(((5-methyl-1-nitroso-1H-imidazol-4-yl)methyl)thio)ethyl)-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity A
CAT No: CL-CMTD-NO-05 CAS No: NA Mol Wt: 298.38 Mol F: C10H14N6OS2 Inv Status: Custom Synthesis
Chemical Name: Methyl (Z)-N'-cyano-N-(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)-N-nitrosocarbamimidothioate
N-Nitroso Cimetidine Impurity B
CAT No: CL-CMTD-NO-06 CAS No: NA Mol Wt: 282.32 Mol F: C10H14N6O2S Inv Status: Custom Synthesis
Chemical Name: Methyl (Z)-N'-cyano-N-(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)-N-nitrosocarbamimidate
N-Nitroso Cimetidine Impurity C
CAT No: CL-CMTD-NO-07 CAS No: NA Mol Wt: 299.35 Mol F: C10H17N7O2S Inv Status: Custom Synthesis
Chemical Name: (E)-1-(((2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)(nitroso)amino)(methylamino)methylene)urea
N-Nitroso Cimetidine Impurity E (Possibility 1)
CAT No: CL-CMTD-NO-08 CAS No: NA Mol Wt: 297.34 Mol F: C10H15N7O2S Inv Status: Custom Synthesis
Chemical Name: (Z)-2-cyano-1-methyl-3-(2-(((5-methyl-1H-imidazol-4-yl)methyl)sulfinyl)ethyl)-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity E (Possibility 2)
CAT No: CL-CMTD-NO-09 CAS No: NA Mol Wt: 297.34 Mol F: C10H15N7O2S Inv Status: Custom Synthesis
Chemical Name: (E)-2-cyano-3-methyl-1-(2-(((5-methyl-1H-imidazol-4-yl)methyl)sulfinyl)ethyl)-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity F
CAT No: CL-CMTD-NO-10 CAS No: NA Mol Wt: 421.54 Mol F: C16H23N9OS2 Inv Status: Custom Synthesis
Chemical Name: (Z)-2-cyano-1,3-bis(2-(((5-methyl-1H-imidazol-4-yl)methyl)thio)ethyl)-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity G (Possibility 1)
CAT No: CL-CMTD-NO-11 CAS No: NA Mol Wt: 141.13 Mol F: C4H7N5O Inv Status: Custom Synthesis
Chemical Name: (E)-2-cyano-1,3-dimethyl-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity G (Possibility 2)
CAT No: CL-CMTD-NO-12 CAS No: NA Mol Wt: 141.13 Mol F: C4H7N5O Inv Status: Custom Synthesis
Chemical Name: (Z)-2-cyano-1,3-dimethyl-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity H (Possibility 1)
CAT No: CL-CMTD-NO-13 CAS No: NA Mol Wt: 343.43 Mol F: C10H17N9OS2 Inv Status: Custom Synthesis
Chemical Name: (E)-2-cyano-1-(2-((2-((E)-2-cyano-3-methylguanidino)ethyl)disulfaneyl)ethyl)-3-methyl-1-nitrosoguanidine
N-Nitroso Cimetidine Impurity H (Possibility 2)
CAT No: CL-CMTD-NO-14 CAS No: NA Mol Wt: 343.43 Mol F: C10H17N9OS2 Inv Status: Custom Synthesis
Chemical Name: (Z)-2-cyano-3-(2-((2-((E)-2-cyano-3-methylguanidino)ethyl)disulfaneyl)ethyl)-1-methyl-1-nitrosoguanidine
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