Active ingredientRifamycin SodiumCat. No. P-R054-001CAS 14897-39-3
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Impurity or related compound · Rifamycin family
Pharmaceutical analytical standardRifamycin Impurity 11
Synonyms: (7S,9E,11S,12R,13R,14R,15R,16R,17S,18S,19E,21Z)-2,11,13,15,17-Pentahydroxy-3,7,12,14,16,18,22-heptamethyl-8,30-dioxa-24-azatetracyclo[23.3.1.14,7.05,28]triaconta-1(28),2,4,9,19,21,25-heptaene-6,23,27,29-tetrone, 25-O-deacetyl-27-O-demethyl Rifamycin S
- Cat. No.
- P-R054-020
- CAS
- 57518-92-0
- Alternative CAS
- N/A
- Formula
- C34H41NO11
- Molecular weight
- 639.70 g/mol
- Category
- Impurity or related compound
Family: Rifamycin
A family of antibiotics discovered in 1957 in Milan by Piero Sensi and Maria Teresa Timbal, with Israeli scientist Pinhas Margalith, in a soil bacterium now called Amycolatopsis rifamycinica; it includes rifampicin, key against tuberculosis and leprosy.
Did you know?The name was inspired by the 1955 French film 'Rififi'; the bacterium had been isolated from a soil sample collected near Saint-Raphaël, in the south of France.
The two levels compared
| Level 1 Mass balance | Level 2 Mass balance + qNMR | |
|---|---|---|
| Identity (IR, MS, 1H and 13C-NMR; peptides: ESI-MS, MALDI-TOF and IR) | ✓ | ✓ |
| HPLC purity (min. 95%) | ✓ | ✓ |
| Content by mass balance (min. 90%; peptides: for information only)* | ✓ | ✓ |
| Content verified by qNMR (small molecules only) | · | ✓ |
| Suitable to qualify it as an in-house primary standard (ICH Q7) | · | ✓ |
* Mass balance is performed on every molecule. The only exceptions are cases where the chemistry of the molecule prevents it, for example oils and highly volatile substances, on which some of the required measurements cannot be made: in those cases the CoA states how the content was assigned.
What you receive
The analytical standard
Shipped under controlled temperature when the molecule requires it.
Certificate of analysis (CoA)
For every lot: identity, purity and assay, with the supporting spectra and chromatograms.
Safety data sheet (SDS)
Sent with every order.
Tracked shipment
Follow your shipment live, from our warehouse to your lab.
More products in the Rifamycin family
Active ingredientRifamycin SodiumCat. No. P-R054-001CAS 14897-39-3
Impurity25-Deacetyl Rifamycin OCat. No. P-R054-002
Impurity4-Methylpiperazine-1-yl-imino Rifamycin OCat. No. P-R054-003
ImpurityDesacetyl RifamycinCat. No. P-R054-004
ImpurityRifamycin BCat. No. P-R054-005CAS 13929-35-6
ImpurityRifamycin Impurity 1Cat. No. P-R054-006
ImpurityRifamycin Impurity 2Cat. No. P-R054-007
ImpurityRifamycin Impurity 3Cat. No. P-R054-009Frequently asked questions
Is mass balance always performed?
Yes, on every molecule. The only exceptions are cases where the chemistry of the molecule prevents it: for example oils and highly volatile substances, on which some measurements (such as thermogravimetry) cannot be made. In those cases the CoA states which method was used to assign the content.
Can I ask for a different quantity?
Yes. The quantities are only suggestions: choose "Other" and enter the milligrams or grams you need.
Which level should I choose?
Level 1 is enough for most routine testing. Level 2 adds an independent qNMR content value and is meant for labs that need to qualify an in-house primary standard. For peptides and similar molecules, Level 2 is not available.
When will I get the quote?
Within 24 working hours, with price, availability and delivery time.
Need a molecule you cannot find?
Custom synthesis of impurities, metabolites and labelled compounds, with the same characterisation level.