Phthalic Acid, Mono-N-Butyl Ester CAS 131-70-4
| CAS No. | 131-70-4 |
| Molecular Formula | C12H14O4 |
| Molecular Weight | 222.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 222.24 g/mol gives Phthalic Acid, Mono-N-Butyl Ester distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Phthalic Acid, Mono-N-Butyl Ester (CAS 131-70-4), molecular formula C12H14O4 and molecular weight 222.24 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Phthalic Acid, Mono-N-Butyl Ester is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 222.24 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 Phthalic Acid, Mono-N-Butyl Ester 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 | >95% |
| 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.) | 1957 |
Related Phthalic Standards
- Phthalic Acid 1-Ethylpropyl Ester (CAS 106477-98-9)
- Phthalic Acid 1-(1,2-dimethylpropyl) Ester (CAS 198284-10-5)
- Phthalic Acid 4,5-cis-Dihydrodiol (CAS 130073-64-2)
- Phthalic Acid, Bis-Propyl Ester (CAS 131-16-8)
- Phthalic Acid, Bis-Isopropyl Ester (CAS 605-45-8)
- Phthalic acid, bis-propyl ester D4 (CAS 358731-29-0)
- Phthalic Acid, Mono-Methyl Ester (CAS 4376-18-5)
- Phthalic-13C6 Acid (CAS 1313734-99-4)
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Why CATO?
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