Active ingredientStearic AcidCat. No. P-S362-001CAS 57-11-4
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Impurity or related compound
Pharmaceutical analytical standardMethyl Stearate
Synonyms: methyl octadecanoate, Stearic acid methyl ester, Kemester 9718, Methyl n-octadecanoate, Metholene 2218, Kemester 9018, n-Octadecanoic acid methyl ester, NSC 9418, Methyl stearate (ii), Methyl stearate (usp-rs), Octadecanoic acid, methyl ester, Methyl-d3Stearate, Kemester 4516, Methyl ester of octadecanoic acid, Methyl ester stearic acid, Methyl stearate CRS, Methyl Stearate (Granulated), Octadecanoic acid methyl ester (FAME MIX)
- Cat. No.
- P-S362-014
- CAS
- 112-61-8
- Alternative CAS
- N/A
- Formula
- C19H38O2
- Molecular weight
- 298.51 g/mol
- Category
- Impurity or related compound
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.
Pharmacopoeial standards available
The official European Pharmacopoeia standards for this molecule, supplied with EDQM documentation.
- Methyl stearateEP M1770200
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Isotopically labelledStearic Acid-d2Cat. No. P-S362-004CAS 19905-58-9
Isotopically labelledStearic Acid-d3Cat. No. P-S362-005CAS 62163-39-7
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Impurity5-Doxyl Stearic Acid, free radicalCat. No. P-S362-007CAS 29545-48-0
Impurity9,10-Dihydroxystearic AcidCat. No. P-S362-008CAS 120-87-6Frequently 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.