Di-tert-butyl isophthalate CAS 33813-32-0
| CAS No. | 33813-32-0 |
| Molecular Formula | C16H22O4 |
| Molecular Weight | 278.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Di-tert-butyl isophthalate.
CATO supplies Di-tert-butyl isophthalate (CAS 33813-32-0), a certified reference material (molecular formula C16H22O4, MW 278.34 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Di-tert-butyl isophthalate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 278.34 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.
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 | C16H22O4 |
| Molecular Weight | 278.34 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
Recommended Standards
- Di-sec-butyl Phthalate (CAS 4489-61-6)
- Di-tert-butyl phthalate (CAS 30448-43-2)
- Diethyl 2-(3,4-dimethylbenzyl)malonate (CAS 289902-87-0)
- Di-tert-butyl terephthalate (CAS 28313-42-0)
- N-(2,4-dimethylphenyl)-2-((5-((4-methoxyphenoxy)methyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 332912-64-8)
- 1-(Cyclobutylmethyl)-1H-pyrazole-4-carbaldehyde (CAS 1285065-74-8)
- Ethyl 5-(2-phenylethyl)-1h-pyrazole-4-carboxylate (CAS 1186538-03-3)
- Benzene-1,2-d2 (CAS 19467-24-4)
- Methyl 3,4-dibromobenzoate (CAS 51329-16-9)
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- ethyl 4-bromo-5-methyl-1h-pyrrole-2-carboxylate (CAS 25907-29-3)
- 3-(2-methoxyethyl)-1,5-naphthyridine (CAS 2630178-56-0)
- Insulin Glargine Metabolite M2 (CAS CATO-CPTD788867)
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