2-Hydroxyterephthalic Acid CAS 636-94-2
| CAS No. | 636-94-2 |
| Molecular Formula | C8H6O5 |
| Molecular Weight | 182.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-Hydroxyterephthalic Acid is closely related to 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.
2-Hydroxyterephthalic Acid (CAS 636-94-2) is a high-purity analytical reference standard with the molecular formula C8H6O5 and a molecular weight of 182.13 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2-Hydroxyterephthalic Acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 182.13 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 2-Hydroxyterephthalic Acid 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 | C8H6O5 |
| Molecular Weight | 182.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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.) | 1957 |
Recommended Standards
- 2-Amino-4-Nitrobenzoic Acid (CAS 619-17-0)
- 7-(trifluoromethyl)-1,4-diazepan-5-one (CAS 1146290-50-7)
- 3,4-Dinitrotoluene (CAS 610-39-9)
- 4-Amino-1-(2,2,2-trifluoroethyl)pyrrolidin-2-one (CAS 1153905-27-1)
- 2,6-Dimethylbenzenesulfonic acid (CAS 25241-15-0)
- Methyl 3,4,6-Tri-O-acetyl-2-deoxy-2-phthalimido-1-thio-β-D-glucopyranoside (CAS 79528-48-6)
- MK-3207 (CAS 957118-49-9)
- 3,5-Dichloro-2-(difluoromethyl)isonicotinonitrile (CAS 1805998-64-4)
- 4,5,9,10-Tetrabromobenzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone (CAS 943148-76-3)
- 2,5-Dimethylquinoxaline (CAS 26941-20-8)
- methyl 10-hydroxytetradecanoate (CAS CATO-C3D-263104)
- 2-[1-(2-Methylpropyl)-1H-pyrazol-4-yl]cyclopropane-1-carboxylic acid (CAS 1707369-55-8)
- 5-(Diethylamino)-1-ethyl-6-methyl-3-phenylpyrimidine-2,4(1H,3H)-dione (CAS 33872-85-4)
- Semaglutide Impurity 10 (CAS CATO-C4X-222610)
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