Active ingredientEprinomectinCat. No. P-E071-001CAS 123997-26-2
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Impurity or related compound · Eprinomectin family
Pharmaceutical analytical standardEprinomectin B1a
Synonyms: Eprinomectin component B1a, Eprinomectin component B1, Avermectin a1a, 4 sup(2)-(acetylamino)-5-o-demethyl-4 sup(2)-deoxy-, (4 sup(2)r)-, Avermectin A1a, 4''-(acetylamino)-5-O-demethyl-4''-deoxy-, (4''R)-, Avermectin A(sub 1a), 4''-(acetylamino)-5-O-demethyl-4''-deoxy-, (4''R)-
- Cat. No.
- P-E071-003
- CAS
- 133305-88-1
- Alternative CAS
- N/A
- Formula
- C50H75NO14
- Molecular weight
- 914.14 g/mol
- Category
- Impurity or related compound
Family: Eprinomectin
An antiparasitic of the avermectin family, introduced in the second half of the 1990s for beef and dairy cattle: it is poured along the animal's back (pour-on formulation) and acts against worms and external parasites.
Did you know?Only tiny amounts pass into milk, less than 1% of the dose, a feature that makes it suitable for dairy cows as well.
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 Eprinomectin family
Active ingredientEprinomectinCat. No. P-E071-001CAS 123997-26-2
ImpurityEprinomectin B1bCat. No. P-E071-004CAS 133305-89-2
ImpurityEprinomectin Impurity 1Cat. No. P-E071-005CAS 172842-97-6Frequently 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.