5-(Methylthio)isophthalic acid CAS 1822671-24-8
| CAS No. | 1822671-24-8 |
| Molecular Formula | C9H8O4S |
| Molecular Weight | 212.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-(Methylthio)isophthalic acid is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 5-(Methylthio)isophthalic acid (CAS 1822671-24-8), a certified reference material (molecular formula C9H8O4S, MW 212.22 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H8O4S, 5-(Methylthio)isophthalic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 212.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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.
Physical & Chemical Properties
| Molecular Formula | C9H8O4S |
| Molecular Weight | 212.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Sulfur Atoms | 1 |
Related Methylthio Standards
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- 3-[4-(Methylthio)phenoxy]propionic Acid (CAS 18333-20-5)
- 2-(3-Methyl-4-(methylthio)phenoxy)acetic acid (CAS 3364-88-3)
- Ethyl 2-(2-(methylthio)pyrimidin-4-yl)acetate (CAS 582309-12-4)
- 3-Methyl-2-(methylthio)thieno[3,2-d]pyrimidin-4(3H)-one (CAS 1144479-73-1)
- 2,8-Bis(methylthio)-9H-purine (CAS 10179-95-0)
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Recommended Standards
- 2-((4-Fluorophenyl)amino)benzonitrile (CAS 18201-87-1)
- Ethyl 2-(2-fluoro-6-methoxyphenyl)acetate (CAS 1823577-21-4)
- 3-Fluoro-2-(1-methylethoxy)-benzoic acid methyl ester (CAS 1809168-62-4)
- 4-((Carboxymethyl)thio)benzoic acid (CAS 18619-34-6)
- (E)-3,4-dihydronaphthalen-1(2H)-one O-phenylsulfonyl oxime (CAS 145609-82-1)
- 2,6-Dimethyl-3-nitrobenzaldehyde (CAS 179554-17-7)
- 2,6-Bis(benzyloxy)-3-(4-bromo-2,6-difluorophenyl)pyridine (CAS 2758532-18-0)
- Iguratimod Impurity 85 2HCl (CAS CATO-C4X-182685)
- 6-(Dimethylamino)-1-methyl-3-propyl-1,3,5-triazine-2,4(1H,3H)-dione (CAS 51235-42-8)
- 2,6-Difluorobenzenesulfonamide (CAS 60230-37-7)
- 3-(Butylsulfanyl)-5-chloro-1,2,4-thiadiazole (CAS 13715-65-6)
- n-((1,5-Dimethyl-1h-pyrazol-4-yl)methyl)propan-2-amine (CAS 1152858-83-7)
- 2,2-Dimethyl-2,3-dihydro-1H-inden-1-amine (CAS 119084-51-4)
- Semaglutide Impurity 185 (CAS CATO-C4X-2226185)
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