tert-Butyl hydrogen phthalate CAS 33693-84-4
| CAS No. | 33693-84-4 |
| Molecular Formula | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of tert-Butyl hydrogen phthalate 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.
tert-Butyl hydrogen phthalate (CAS 33693-84-4), molecular formula C12H14O4 and molecular weight 222.24 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, tert-Butyl hydrogen phthalate (C12H14O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 222.24 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures tert-Butyl hydrogen phthalate 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 | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, 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.) | 1966 |
Recommended Standards
- Indobufen Impurity 92 (CAS CATO-C4X-179292)
- Butylphthalide Impurity 57 (CAS 2997796-75-3)
- Pemetrexed Impurity 61 (CAS CATO-C4X-172661)
- Esmolol Impurity 20 (CAS 2167848-51-1)
- 4-{[3-(2-methylcyclopropyl)-1,2,4-oxadiazol-5-yl]methyl}piperidine hydrochloride (CAS 1909318-66-6)
- cis-Methyl 3-carbamoylcyclobutanecarboxylate (CAS 142733-62-8)
- tert-Butyl cyclopropyl(3-(1-formylpyrrolidin-2-yl)pyridin-2-yl)carbamate (CAS 1352532-92-3)
- 1-(1-Aminopropan-2-yl)-2,2-dimethylcyclopentan-1-ol (CAS 1507948-23-3)
- 6-Indolecarbonitrile (CAS 15861-36-6)
- 1-Hydroxy-10-methylacridin-9(10H)-one (CAS 16584-54-6)
- 3-(1-aminoethyl)-4-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one hydrochloride (CAS 1955520-92-9)
- 5-(1-(4-ethylphenoxy)ethyl)-1,3,4-thiadiazol-2-amine (CAS 915920-35-3)
- 2-Benzamido-2-benzyl-3-hydroxypropanoic acid (CAS 185396-28-5)
- Peptide 437 (CAS CATO-CPTD788437)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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