3-Chloro-2-methyl-4-nitrophenol CAS 55289-28-6
| CAS No. | 55289-28-6 |
| Molecular Formula | C7H6ClNO3 |
| Molecular Weight | 187.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Chloro-2-methyl-4-nitrophenol is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 3-Chloro-2-methyl-4-nitrophenol (CAS 55289-28-6), a certified reference material (molecular formula C7H6ClNO3, MW 187.58 g/mol) for analytical method development and quality control.
3-Chloro-2-methyl-4-nitrophenol (C7H6ClNO3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
As a certified reference material (CRM), 3-Chloro-2-methyl-4-nitrophenol 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 | C7H6ClNO3 |
| Molecular Weight | 187.58 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 5-Chloro-4-methyl-2-nitrophenol (CAS 100278-74-8)
- N-(6-Chloro-3-oxo-2,3-dihydropyridazin-4-yl)acetamide (CAS 100367-79-1)
- 3-Chloro-4-methyl-5-nitropyridin-2-amine (CAS 1003710-31-3)
- 2-Chloro-5-nitroanisole (CAS 1009-36-5)
- 2-Chloro-4-methyl-5-nitrophenol (CAS 100959-50-0)
- 5-Chloro-1-methyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid (CAS 101384-60-5)
- 4-Chloro-5-methoxypicolinic acid (CAS 103878-33-7)
- 2-Chloro-5-methoxyisonicotinic acid (CAS 1060801-70-8)
Recommended Standards
- 3-Amino-5-chloro-2-hydroxybenzoic acid (CAS 7180-80-5)
- 3-CHloro-2-methyl-6-nitrophenol (CAS 83577-91-7)
- 3-Amino-4-chloro-5-hydroxybenzoic acid (CAS 93561-97-8)
- 3-Chloro-5-methoxyisonicotinic Acid (CAS 214976-36-0)
- N-(5-(4-((2-Hydroxyethyl)amino)phenoxy)pentyl)benzamide (CAS 103387-97-9)
- 5-isopropyl-2-methyl-thiophen-3-amine;hydrochloride (CAS 2567558-61-4)
- Ethyl 2-(4-Fluoro-3-indolyl)-2-oxoacetate (CAS 849630-89-3)
- 5-Bromo-3-fluoro-2-methylbenzoic acid (CAS 1427433-28-0)
- 2-Cyano-2-(hydroxyimino)acetic Acid (CAS 78325-18-5)
- 4-Cyano-2-hydroxybenzyl amine (CAS 741670-77-9)
- 2-(Piperazin-1-yl)-N-(p-tolyl)acetamide (CAS 89473-82-5)
- Ethyl 2-(1-(chlorosulfonyl)cyclopropyl)acetate (CAS 1461708-73-5)
- 5,7-Dimethylbenzofuran (CAS 64965-91-9)
- Acetyl tetrapeptide-3 (CAS 827306-88-7)
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