4-(3,5-Dibromo-2-pyridylazo)-N-ethyl-N-(3-sulfo-propyl)aniline sodium salt monohydrate CAS 100743-65-5
| CAS No. | 100743-65-5 |
| Molecular Formula | C16H18Br2N4O3S |
| Molecular Weight | 506.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 4-(3,5-Dibromo-2-pyridylazo)-N-ethyl-N-(3-sulfo-propyl)aniline sodium salt monohydrate (CAS 100743-65-5), a certified reference material (molecular formula C16H18Br2N4O3S, MW 506.21 g/mol) for analytical method development and quality control.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, 4-(3,5-Dibromo-2-pyridylazo)-N-ethyl-N-(3-sulfo-propyl)aniline sodium salt monohydrate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 506.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C16H18Br2N4O3S |
| Molecular Weight | 506.21 g/mol |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Dibromo Standards
- 11-(3,5-Dibromo-4-hydroxyphenyl)-3,3,8-trimethyl-2,3,4,5,10,11-hexahydro-1H-dibenzo[b,e][1,4]diazepin-1-one (CAS 1024232-75-4)
- (11bS)-2,6-Dibromo-4-hydroxydinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepine 4-oxide (CAS 1644121-35-6)
- (R)-2,6-Dibromo-4-hydroxydinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepine 4-oxide (CAS 861909-33-3)
- 1,2-Dibromo-1h,1h,2h-perfluorooctane (CAS 51249-62-8)
- (E)-[(5,7-Dibromo-1-benzofuran-2-yl)(phenyl)methylidene]amino thiophene-2-carboxylate (CAS 477858-33-6)
- 2,7-Dibromo-9-(tridecan-7-yl)-9H-carbazole (CAS 1256704-63-8)
- 2,6-Dibromo-4,4-dihexyl-4H-cyclopenta[2,1-b:3,4-b’]dithiophene (CAS 528570-55-0)
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Recommended Standards
- Abiraterone Impurity 82 (CAS 1268610-38-3)
- P7C3A20, 97% (CAS 1235481-90-9)
- (((2R,3S,5R)-5-(2,6-Diamino-9H-purin-9-yl)-3-hydroxytetrahydrofuran-2-yl)methyl)triphosphoric acid (CAS 81503-63-1)
- Fluazuron (CAS 86811-58-7)
- cis-(+)-3-Methyl-4-(phenylamino)-1-(2-phenylethyl)-4-piperidinecarboxylic Acid Methyl Ester (CAS 61380-35-6)
- 4-bromo-N-(3,4-dimethoxyphenyl)benzenesulfonamide (CAS 332354-59-3)
- N-(2,5-Dimethoxyphenyl)-3-ethyl-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7-amine (CAS 899975-28-1)
- Dapagliflozin Impurity 41 (CAS 1079083-63-8)
- 2,2-Dimethylpiperazine (CAS 84477-72-5)
- 1-Allyl-3-(4-phenoxyphenyl)thiourea (CAS 433253-68-0)
- 3-[(3-bromophenyl)methyl]-5-(chloromethyl)-1,2,4-oxadiazole (CAS 1156169-39-9)
- 2-((2-(Azepan-1-yl)-2-oxoethyl)thio)-6-(trifluoromethyl)pyrimidin-4(3H)-one (CAS 899990-70-6)
- Tri-o-methyl-d-glucal (CAS 16740-98-0)
- Semaglutide Impurity 185 (CAS CATO-C4X-2226185)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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