Octadecanoic acid, 12-hydroxy-, polymer with methyl 2-methyl-2-propenoate and 2-oxiranylmethyl 2-methyl-2-propenoate CAS 26656-99-5
| CAS No. | 26656-99-5 |
| Molecular Formula | C18H36O3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Octadecanoic acid, 12-hydroxy-, polymer with methyl 2-methyl-2-propenoate and 2-oxiranylmethyl 2-methyl-2-propenoate (CAS 26656-99-5), a certified reference material (molecular formula C18H36O3C7H10O3C5H8O2, MW 542.75 g/mol) for analytical method development and quality control.
Structurally, Octadecanoic acid, 12-hydroxy-, polymer with methyl 2-methyl-2-propenoate and 2-oxiranylmethyl 2-methyl-2-propenoate (C18H36O3C7H10O3C5H8O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 542.75 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C18H36O3 C7H10O3 C5H8O2 |
| Molecular Weight | 542.75 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
Related Octadecanoic Standards
- Octadecanoic acid, octyl ester (CAS 109-36-4)
- Octadecanoic Acid Ethyl Ester (CAS 111-61-5)
- Octadecanoic acid, 2-sulfo- (CAS 1115-17-9)
- Octadecanoic Acid Methyl Ester (CAS 112-61-8)
- Octadecanoic-9,9,10,10-d4 Acid (CAS 130048-57-6)
- Octadecanoic acid, 9-(sulfooxy)-, 1-methyl ester, sodium salt (1:1) (CAS 139-99-1)
- octadecanoic acid (CAS 1957-11-4)
- Octadecanoic-2,2-d2 Acid (CAS 19905-58-9)
Recommended Standards
- 1-Butyl-4-chlorobenzene (CAS 15499-27-1)
- 198560-38-2 1H-Indole-1,2-dicarboxylic acid, 2,3-dihydro-, 1-(9H-fluoren-9-ylmethyl) ester, (2S)- (CAS 198560-38-2)
- N-(5-Acetyl-1-benzyl-6-methyl-2-oxo-1,2-dihydro-3-pyridinyl)-4-methylbenzenecarboxamide (CAS 477864-89-4)
- n-[(7-ethyl-1h-indol-3-yl)methylidene]hydroxylamine (CAS 790263-81-9)
- Nybomycin (CAS 30408-30-1)
- rac Efavirenz-d5(major) (CAS 1132642-95-5)
- endo-8-Oxabicyclo[3.2.1]octan-3-ol (CAS 343963-51-9)
- Tamsulosin Impurity 13 (CAS 35193-64-7)
- 3-Methoxyphenyl 6-bromo-2-oxo-2H-chromene-3-carboxylate (CAS 324066-42-4)
- Semaglutide impurity 78 (CAS CATO-C4X-222678)
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