2,3-Dihydroxybenzoyl chloride CAS 66168-85-2
| CAS No. | 66168-85-2 |
| Molecular Formula | C7H5ClO3 |
| Molecular Weight | 172.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2,3-Dihydroxybenzoyl chloride (CAS 66168-85-2), a certified reference material (molecular formula C7H5ClO3, MW 172.57 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 2,3-Dihydroxybenzoyl chloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 172.57 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures 2,3-Dihydroxybenzoyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H5ClO3 |
| Molecular Weight | 172.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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; 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.) | 1975 |
| Halogen Content | Cl-containing |
Related Dihydroxybenzoyl Standards
- 2,6-Dihydroxybenzoyl chloride (CAS 116615-34-0)
- 3,5-Dihydroxybenzoyl chloride (CAS 41696-97-3)
- (2,3-Dihydroxybenzoyl)glycine (CAS 16414-49-6)
- 2-(2,5-Dihydroxybenzoyl)benzoic acid (CAS 6272-39-5)
- (E)-4-(2-(3,5-dihydroxybenzoyl)hydrazinyl)-4-oxobut-2-enoic acid (CAS 304455-10-5)
- (E)-2-(3,4-Dihydroxybenzoyl)-3-(3,4-dihydroxyphenyl)acrylonitrile (CAS 133550-18-2)
- 2-((3,4-Dihydroxybenzoyl)oxy)-4,6-dihydroxybenzoic Acid (CAS 30048-34-1)
Recommended Standards
- 2-(Chloromethyl)-5-nitropyridine (CAS 887588-15-0)
- 2-Amino-4-chloronicotinic acid (CAS 605661-83-4)
- 2-(Chloromethyl)-4-nitropyridine (CAS 312321-71-4)
- 2-Amino-5-chloroisonicotinic acid (CAS 929302-26-1)
- 3-(4-Fluorophenyl)-6,7-dihydro-1H-indazol-4(5H)-one (CAS 155590-18-4)
- 3,5-Difluoro-4-methylbenzonitrile (CAS 170572-50-6)
- 2,6-Dihydroxy-3-nitrobenzonitrile, tech (CAS 233585-04-1)
- [(2R,3S,5R)-2-(hydroxymethyl)-5-[5-[2-(1H-indol-3-yl)ethylcarbamoyl]-2,4-dioxo-pyrimidin-1-yl]tetrahydrofuran-3-yl] acetate (CAS 1219931-00-6)
- (3S,5R)-5-aminotetrahydropyran-3-ol (CAS 1932174-95-2)
- Benzene-1,3-dicarbonyloxysuccinimide (CAS 1799788-29-6)
- Topiroxostat Impurity 6 (CAS 54-85-3)
- 3-Chloro-2-phenylimidazo[1,2-a]pyridine (CAS 64413-91-8)
- Methyl 2-(4-Isobutoxyphenyl)acetate (CAS 61904-54-9)
- Tirzepatide Impurity 23 X TFA Salt (CAS CATO-C4X-324023)
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