Tartrazine Impurity 3 CAS 1934-22-1
| CAS No. | 1934-22-1 |
| Molecular Formula | C16H10N4O6S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Tartrazine Impurity 3 (CAS 1934-22-1), a pharmacopoeial impurity reference standard (molecular formula C16H10N4O6SNa, MW 409.33 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Tartrazine Impurity 3 (C16H10N4O6SNa) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C16H10N4O6S 2*Na |
| Molecular Weight | 409.33 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Tartrazine Standards
Recommended Standards
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- 5-Chloro-2-(difluoromethyl)-1,3-difluorobenzene (CAS 1204296-04-7)
- 4,6-Bis(trifluoromethyl)-N-[3-(trifluoromethyl)phenyl]pyridine-2-carboxamide (CAS 1092345-06-6)
- Liothyronine EP Impurity A-13C9-15N (CAS 1431868-11-9)
- 2-amidino-Acetamide (CAS 29604-68-0)
- Insulin Degludec Impurity 3 (CAS CATO-C4X-21573)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com