Micafungin impurities and related standards
Micafungin is held here as a working collection of 73 reference materials across 11 CAS numbers. Within the range, numbered impurities go up to 25. 58 of the entries are impurity-type materials of the parent, 5 are salt or counter-ion variants. 10 entries carry a verified structure drawing, a coverage of 14%; the rest are listed without a structure rather than with an unverified one. 10 of them sit in tier A or B, meaning the data behind the page is complete enough to be indexed and quoted directly, while 63 remain tier C and are kept for search coverage. Storage behaviour differs across a series like this even when the parent is stable. The N-oxides and the hydroxylated analogues are the ones that drift upward on standing, and a certificate that states storage conditions without saying which degradant was monitored leaves the user unable to tell whether a rise on stability is the material or the handling. Anyone comparing two suppliers on this parent should ask the same three questions of each: which letters are held, what the content basis is, and whether the structure on the page was verified against the name rather than copied from it.
Sources: DailyMed (US NLM) - MICAFUNGIN IN SODIUM CHLORIDE INJECTION [BAXTER HEALTHCARE CORPORATION].
11 reference standards related to Micafungin held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.
In this group: 4 pharmaceutical intermediates · 2 fine chemicals · 2 drug metabolite standards · 2 impurity reference standards. CAS numbers are listed for 11 of 11; 11 entries carry a structure drawing.
On this page
11 reference standards
All entries — structure, identifiers and pack sizes
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Micafungin
CUSTOM SYNTHESISRS-U094213 -
Micafungin sodium
IN STOCKRS-P140044 -
1-Eth-1-ynyl-4-(pentyloxy)benzene
CUSTOM SYNTHESISRS-Z401L0M -
2-Methyl-4-(4-(pentyloxy)phenyl)but-3-yn-2-ol
IN STOCKRS-P011274 -
4-N-Amyloxybromobenzene
IN STOCKRS-P025354 -
FR 179642
BACK ORDERRS-I016021 -
Methyl 4-(3-oxo-3-(4-(pentyloxy)phenyl)propanoyl)benzoate
IN STOCKRS-P140126 -
Micafungin Sodium Stereoisomer
BACK ORDERRS-U094162 -
Micafungin Impurity 25
BACK ORDERRS-M346002
11 reference standards
Frequently asked
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Cannot find the impurity you need? Non-compendial impurities can be quoted from a structure — a CAS number is not required. Write to sales@rssechem.com.





![Chemical structure of 5-((1S,2S)-2-((2R,6S,9S,11R,12S,14aS,15S,16S,20S,23S,25aS)-20-((R)-3-Amino-1-hydroxy-3-oxopropyl)-2,11,12,15-tetrahydroxy-6-((R)-1-hydroxyethyl)-16-methyl-5,8,14,19,22,25-hexaoxo-9-(4-(5-(4-(pentyloxy)phenyl)isoxazol-3-yl)benzamido)tetracosahydro-1H-dipyrrolo[2,1-c:2',1'-l][1,4,7,10,13,16]hexaazacyclohenicosin-23-yl)-1,2-dihydroxyethyl)-2-hydroxyphenyl Hydrogen Sulfate](/structures/w4/PIEUQSKUWLMALL-NJVYOUANSA-N.webp?v=9)



![Chemical structure of rel-5-((2S)-2-((6S,23S)-9-Amino-20-(3-amino-1-hydroxy-3-oxopropyl)-2,11,12,15-tetrahydroxy-6-((R)-1-hydroxyethyl)-5,8,14,19,22,25-hexaoxotetracosahydro-1H-dipyrrolo[2,1-c:2',1'-l][1,4,7,10,13,16]hexaazacyclohenicosin-23-yl)-1,2-dihydroxyethyl)-2-hydroxyphenyl Hydrogen Sulfate](/structures/w4/IOVXPEHBNYQSGV-FHZKTDPRSA-N.webp?v=9)
