Bis(2-ethylhexyl) Isophthalate CAS 137-89-3
| CAS No. | 137-89-3 |
| Molecular Formula | C24H38O4 |
| Molecular Weight | 390.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Bis(2-ethylhexyl) Isophthalate (CAS 137-89-3), molecular formula C24H38O4 and molecular weight 390.56 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, a hydroxyl group, an ether linkage, Bis(2-ethylhexyl) Isophthalate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 390.56 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).
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), Bis(2-ethylhexyl) Isophthalate 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 | C24H38O4 |
| Molecular Weight | 390.56 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Bis Standards
- 2,5-Bis((2-ethylhexyl)oxy)terephthalaldehyde (CAS 288574-72-1)
- 2-Ethylhexyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate (CAS 144429-84-5)
- Tris(2-ethylhexyl)phosphine oxide (CAS 2785-32-2)
- Bis(2-ethylhexyl) Phthalate-d4 (CAS 93951-87-2)
- Bis(2-ethylhexyl) cyclohex-4-ene-1,2-dicarboxylate (CAS 2915-49-3)
- 2-Ethylhexyl oleate (CAS 26399-02-0)
- Bis(2-ethylhexyl) phthalate-1,2,3,4,5,6-13C6 (CAS 1675732-80-5)
- bis(2-ethylhexyl) cyclohexane-1,4-dicarboxylate (CAS 84731-70-4)
Recommended Standards
- Isophthalic Acid, Bis-n-Octyl Ester (CAS 4654-18-6)
- Diethylhexyl Phthalate (DEHP) (CAS 117-81-7)
- 5-β-Cholanic Acid-3α-ol-6-one (CAS 2393-61-5)
- Di-N-Octyl Phthalate (CAS 117-84-0)
- 4-((3-(Benzyloxy)benzylidene)amino)-3-(m-tolyl)-1H-1,2,4-triazole-5(4H)-thione (CAS 478255-62-8)
- 1-(Dimethylcarbamoyl)azetidine-3-carboxylic acid (CAS 1480548-82-0)
- (S)-2-(3-Nitrophenyl)piperazine (CAS 1212802-67-9)
- Methyl 3-amino-4-chloro-5-methoxybenzoate (CAS 63603-10-1)
- Methyl 3-amino-2-chloro-4-methylbenzoate (CAS 914643-08-6)
- 5-(pyridin-3-yl)pentan-2-amine (CAS 111848-81-8)
- 3-amino-6-methyl-thieno[2,3-b]pyridine-2-carboxylic acid (CAS 59488-60-7)
- 2-(4-Acetyl-3-iodophenyl)acetic acid (CAS 2089314-99-6)
- (E)-4-((4-methoxyphenyl)diazenyl)benzene-1,3-diamine hydrochloride (CAS 68936-13-0)
- Liraglutide Impurity 19 TFA Salt (CAS CATO-C4X-199219)
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