Pyridine Hydroiodide CAS 18820-83-2
| CAS No. | 18820-83-2 |
| Molecular Formula | HI |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Pyridine Hydroiodide (CAS 18820-83-2), a certified reference material (molecular formula HIC5H5N, MW 207.01 g/mol) for analytical method development and quality control.
Structurally, Pyridine Hydroiodide (HIC5H5N) contains a nitrile group, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 207.01 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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), Pyridine Hydroiodide 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 | HI C5H5N |
| Molecular Weight | 207.01 g/mol |
| Appearance | 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 tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 1 |
Related Pyridine Standards
- 2,2'-(Pyridine-2,6-diyl)bis(propan-2-ol) (CAS 100055-21-8)
- 2-(Pyridine-4-carbonyl)cyclohexan-1-one (CAS 100192-17-4)
- Pyridine, 3,3'-[5',5''-bis[3-(3-pyridinyl)phenyl][1,1':3',1'':3'',1'''-quaterphenyl]-3,3'''-diyl]bis- (CAS 1009033-94-6)
- Pyridine-3-sulfinic acid (CAS 101084-77-9)
- Pyridine-4-sulfinic acid (CAS 101084-78-0)
- Pyridine-3,5-diyldiboronic acid (CAS 1012085-48-1)
- Pyridine, 2-chloro-3-methoxy-4-nitro-, 1-oxide (CAS 101664-57-7)
- Pyridine-3,4-diol (CAS 10182-48-6)
Recommended Standards
- 6-Methyl-2-(2-((1E,2E)-3-phenylallylidene)hydrazinyl)pyrimidin-4(3H)-one (CAS 64792-21-8)
- tert-Butyl 7-benzyl-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate (CAS 227940-71-8)
- Methyl 5-bromo-1-methyl-1H-benzo[d]imidazole-6-carboxylate (CAS 2092791-54-1)
- (3R,4S)-1,1,2,2,3,4-hexafluorocyclobutane (CAS 22819-47-2)
- (3S,4S,5R,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (CAS 51008-88-9)
- 2-Phenyl-2H-benzo[d][1,2,3]triazole 1-oxide (CAS 51750-18-6)
- Emorfazone Impurity 6 (CAS 67911-02-8)
- Naldemedine (CAS 916072-89-4)
- 1-(1,3-Dimethyl-1H-pyrazol-4-yl)-N-((1,3-dimethyl-1H-pyrazol-5-yl)methyl)methanamine hydrochloride (CAS 1856040-93-1)
- DAPK Substrate Peptide (CAS 386769-53-5)
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