Active ingredientLynestrenolCat. No. P-L116-001CAS 52-76-6
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Pharmacopoeial impurity · Lynestrenol family
Pharmaceutical analytical standardLynestrenol EP Impurity B
Synonyms: 19-Norpregn-4-en-20-yn-17-ol, Lynestrenol impurity b (ep impurity), Lynestrenol impurity B
- Cat. No.
- P-L116-003
- CAS
- 58311-09-4
- Alternative CAS
- N/A
- Formula
- C20H28O
- Molecular weight
- 284.44 g/mol
- Category
- Pharmacopoeial impurity (EP/USP)
Family: Lynestrenol
A synthetic progestin discovered in the late 1950s, patented in the Netherlands in 1957 and in medical use since 1961; it is used in the contraceptive pill and for menstrual disorders.
Did you know?On its own it is inactive: it is a prodrug that the liver converts almost completely into norethisterone. In 1962 it became part of the first Dutch contraceptive pill.
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 Lynestrenol family
Active ingredientLynestrenolCat. No. P-L116-001CAS 52-76-6
Pharmacopoeial impurityLynestrenol EP Impurity ACat. No. P-L116-002
Pharmacopoeial impurityLynestrenol EP Impurity CCat. No. P-L116-004CAS 5225-38-7Frequently 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.