Tartrazine CAS 1934-21-0
| CAS No. | 1934-21-0 |
| Molecular Formula | C16H9N4O9S2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 488.38 g/mol gives Tartrazine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Tartrazine (CAS 1934-21-0) is a high-purity analytical reference standard with the molecular formula C16H9N4O9S2Na and a molecular weight of 488.38 g/mol.
Tartrazine (C16H9N4O9S2Na) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Tartrazine meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C16H9N4O9S2 3*Na |
| Molecular Weight | 488.38 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) | 14.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 2 |
Related Tartrazine Standards
Recommended Standards
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- 3-[2-(3,4-Dichlorophenoxy)ethyl]piperidinehydrochloride (CAS 1220037-25-1)
- 2-Bromo-1-(2-fluoro-4-methoxyphenyl)propan-1-one (CAS 1156358-86-9)
- Methyl 4-(4-methylphenoxy)benzoate (CAS 21120-72-9)
- 3-(Prop-2-yn-1-yl)tetrahydrofuran-3-carboxylic acid (CAS 1526588-44-2)
- Ethyl 4-(4-Pyridyl)-2-thiazolecarboxylate (CAS 216867-38-8)
- 4-(3-Carboxyphenyl)-2-methylphenol (CAS 1261976-44-6)
- 1-(2-Methoxyphenyl)-3-(2-((5-(pyrrolidin-1-yl)pyridazin-3-yl)amino)ethyl)urea (CAS 1797662-10-2)
- Mycophenolic Acid-d3 β-D-Glucuronide (CAS CATO-C4X-21227)
- Semaglutide impurity 28 (CAS CATO-C4X-222628)
Why CATO?
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