Mono(2-hydroxyisobutyl)phthalate CAS 64339-39-5
| CAS No. | 64339-39-5 |
| Molecular Formula | C12H14O5 |
| Molecular Weight | 238.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Mono(2-hydroxyisobutyl)phthalate (CAS 64339-39-5), molecular formula C12H14O5 and molecular weight 238.24 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, Mono(2-hydroxyisobutyl)phthalate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 238.24 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.
As a certified reference material (CRM), Mono(2-hydroxyisobutyl)phthalate 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 | C12H14O5 |
| Molecular Weight | 238.24 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1975 |
Related Mono Standards
- Mono(3-hydroxybutyl)phthalate (CAS 57074-43-8)
- Mono-2-hydroxybutyl Phthalate (CAS 856985-72-3)
- Mono(4-pentenyl)phthalate-d4 (CAS 1346601-95-3)
- Mono(2E-pentenyl) Phthalate-d4 (CAS 1795141-13-7)
- Mono(2-carboxyethyl) Phthalate (CAS 92569-47-6)
- 1794753-19-7 Mono(2-carboxyethyl) Phthalate-d4 (CAS 1794753-19-7)
- Mono-(2E-pentenyl) Phthalate (CAS 1334376-71-4)
- Mono(carboxymethyl) Phthalate-d4 (CAS 1346600-11-0)
Recommended Standards
- Methyl phenazine-1-carboxylate (CAS 3225-19-2)
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- N-([1,2,4]triazolo[1,5-a]pyridin-8-yl)benzamide (CAS 338406-04-5)
- 2-Cyclopropyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde (CAS 1185428-36-7)
- Methyl 6-hydroxy-2-(2-methoxy-2-oxoethyl)nicotinate (CAS 766548-57-6)
- (E)-1-(4-(2,2-difluoroethoxy)phenyl)propan-1-one oxime (CAS 1216346-67-6)
- Imidazo[1,2-a]pyrazin-8(7H)-one hydrochloride (CAS 689297-88-9)
- 1,2,3,4-Tetrabromodibenzo[b,d]furan (CAS 617707-58-1)
- 1-(4-(Trifluoromethyl)phenyl)-1H-pyrazol-3-ol (CAS 1020058-01-8)
- 2-(2-(2-METHYLCYCLOHEXYLOXY)PHENYL)ETHANOL (CAS 2089650-99-5)
- 5-Bromo-1-isopropyl-1H-pyrrolo[2,3-b]pyridine-2,3-dione (CAS 1956376-31-0)
- Bicyclo[3.1.1]Heptan-1-ylmethanamine (CAS 2091080-49-6)
- Tirzepatide Impurity 12 (CAS CATO-C4X-324012)
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