Active ingredient
Pharmaceutical analytical standardPigment Red 57
Synonyms: D & C Red No. 6, Lithol rubin B, Lithol Rubine, Siloton Rubine B, Vynamon Claret Y, Irgalite Red 4B, Isol Ruby BK, Segnale Red 3R, Isol Ruby BKS, Permanent Red 4B, Plastol Rubine BC, Lithol Rubine BNA, Siloton Rubine 2B, Irgalite Rubine PB, Resamine Rubine BC, Silotermo Carmine G, Isol Bona Rubine BK, Permanent Red F 6R, Japan Red 201, Isol Bona Rubine BKS, Isol Bona Rubine KBK, Kromon Permanent Red 4B, Dye dc red no. 6, fd&c red no. 6 (delisted), Disodium 3-hydroxy-4-((4-methyl-2-sulphonatophenyl)azo)-2-naphthoate, d&c red no. 6 (ii), Disodium 3-hydroxy-4-((e)-(4-methyl-2-sulfonatophenyl)diazenyl)-2-naphthoate, Litholrubinbca, Lithol Rubine B, Lithol rubine BCA
- Cat. No.
- P-P701-001
- CAS
- 5858-81-1
- Alternative CAS
- 16014-23-6 (free acid)
- 93923-95-6 (potassium salt)
- 62103-78-0 (magnesium salt)
- 6280-74-6 (calcium salt)
- 5281-04-9 (calcium salt)
- 5281-09-4 (calcium salt)
- Formula
- C18H14N2Na2O6S
- Molecular weight
- 432.36 g/mol
- Category
- Active ingredient (API)
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
Shipped under controlled temperature when the molecule requires it.
For every lot: identity, purity and assay, with the supporting spectra and chromatograms.
Sent with every order.
Follow your shipment live, from our warehouse to your lab.
Frequently 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.