Diethyl phthalate CAS 84-66-2
| CAS No. | 84-66-2 |
| Molecular Formula | C12H14O4 |
| Molecular Weight | 222.24 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 Diethyl phthalate.
Diethyl phthalate (CAS 84-66-2) is a high-purity analytical reference standard with the molecular formula C12H14O4 and a molecular weight of 222.24 g/mol.
Structurally, Diethyl 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Diethyl 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 | 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 Diethyl Standards
- Diethyl Isophthalate (CAS 636-53-3)
- Diethyl Terephthalate (CAS 636-09-9)
- Diethyl hexylphosphonate (CAS 16165-66-5)
- Diethyl (3-methyl-2-oxobutyl)phosphonate (CAS 7751-67-9)
- 1,1-Diethyl-3-(4-methoxyphenyl)urea (CAS 56015-84-0)
- Diethyl dicyanofumarate (CAS 35234-88-9)
- Diethyl (2-oxotetrahydrofuran-3-yl)phosphonate (CAS 2907-85-9)
- 2,5-Diethyl-6-methyl-3H,4H-thieno[2,3-d]pyrimidin-4-one (CAS 1241604-49-8)
Recommended Standards
- Ferulic Acid Impurity N3 (CAS 155401-23-3)
- Monoisobutyl Phthalate（MiBP） (CAS 30833-53-5)
- Vanillin Isobutyrate (CAS 20665-85-4)
- Ac-Tyr-NH? (CAS 1948-71-6)
- 4-Morpholinopiperidine-4-carboxylic acid (CAS 883545-53-7)
- (R)-Azepane-4-sulfonamide (CAS 2165845-48-5)
- 1-Isopropylpiperazine (CAS 4318-42-7)
- 2-Bromo-5-(difluoromethyl)pyridine (CAS 1221272-81-6)
- 3,4-DICARBOXYTHIOPHENE 3,4-THIOPHENEDICARBOXYLIC ACID 4282-29-5 AS06782 Thiophene-3,4-dicarboxylic acid (CAS 4282-29-5)
- N-(9-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-6-ethoxy-9H-purin-2-yl)acetamide (CAS 105166-09-4)
- 9-Bromo-10-nitroanthracene (CAS 14789-48-1)
- Relugolix Impurity 51 (CAS CATO-C4X-242951)
- 2-(4-Chlorophenyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridine (CAS 89569-59-5)
- Des-Gln24-Tirzepatide (CAS CATO-CPTD788949)
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