Tryptophan impurities and related standards
10 reference standards related to Tryptophan held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.
In this group: 9 impurity reference standards · 1 pharmaceutical intermediate. CAS numbers are listed for 10 of 10; 9 entries carry a structure drawing.
| Compound | CAS No. | Catalogue No. | Formula | MW |
|---|---|---|---|---|
| Tryptophan Impurity 8 (Tryptophan EP Impurity E) | 3978-11-8 | RS-T073006 | C11H12N2O4 | 236.23 |
| Tryptophan Impurity 1 | 4350-09-8 | RS-T073008 | C11H12N2O3 | 220.22 |
| Tryptophan Impurity 15 | 54-16-0 | RS-T073009 | C10H9NO3 | 191.19 |
| Tryptophan Impurity 17 | 852391-45-8 | RS-T073010 | C11H11BrN2O2 | 283.12 |
| Tryptophan EP Impurity A | 132685-02-0 | RS-T073001 | C24H26N4O4 | 434.49 |
| Tryptophan EP Impurity F | 145545-23-9 | RS-T073002 | C9H12N2O2 | 180.2 |
| Tryptophan EP Impurity K | 149724-31-2 | RS-T073003 | C20H19N3O2 | 333.38 |
| Tryptophan EP Impurity J | 164068-19-3 | RS-T073004 | C22H23N3O4 | 393.44 |
| α-Methyl-L-tryptophan | 16709-25-4 | RS-T073005 | -- | 218.25 |
| Tryptophan Impurity 24 | 4299-70-1 | RS-T073007 | C12H14N2O2 | 218.26 |
Structures
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Tryptophan Impurity 8 (Tryptophan EP Impurity E)
COA per lot -
Tryptophan Impurity 1
COA per lot -
Tryptophan Impurity 15
COA per lot -
Tryptophan Impurity 17
COA per lot -
Tryptophan EP Impurity A
COA per lot -
Tryptophan EP Impurity F
COA per lot -
Tryptophan EP Impurity K
COA per lot -
Tryptophan EP Impurity J
COA per lot
Frequently asked
How many Tryptophan-related reference standards do you hold?
10 standards are listed on this page as of the latest catalogue build. CAS numbers are published for 10 of them and 9 entries carry a structure drawing. The catalogue is extended as new lots are released.
Can you supply a Tryptophan impurity that is not listed here?
Yes. Non-compendial impurities can be quoted from a structure — a CAS number is not required. Send the structure, a SMILES string or the parent drug substance with your enquiry and we will come back with availability.
What documentation is supplied with Tryptophan impurities?
Every lot ships with its own certificate of analysis. The certificate records the catalogue number, the batch number, the tests performed, the specification applied and the result obtained for that lot. A safety data sheet is supplied with the shipment.
Do you publish prices or a lead time for Tryptophan impurities?
No price list is published: quotations are prepared per enquiry, because availability and packing depend on the lot and the quantity you need. Send the catalogue number and the quantity and a technical contact will answer with availability and a quotation.
Cannot find the impurity you need? Non-compendial impurities can be quoted from a structure — a CAS number is not required. Write to [email protected].