cyclo-L-Trp-L-His CAS 18610-65-6
| CAS No. | 18610-65-6 |
| Molecular Formula | C17H17N5O2 |
| 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 cyclo-L-Trp-L-His (CAS 18610-65-6), a certified reference material (molecular formula C17H17N5O2C2HF3O2, MW 437.38 g/mol) for analytical method development and quality control.
Structurally, cyclo-L-Trp-L-His (C17H17N5O2C2HF3O2) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 437.38 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO manufactures cyclo-L-Trp-L-His 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 | C17H17N5O2 C2HF3O2 |
| Molecular Weight | 437.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 5 |
Related cyclo Standards
- Cyclo(-Gly-Phe) (CAS 10125-07-2)
- Cyclo(-Arg-Ala-Asp-D-Phe-Cys) trifluoroacetate salt (CAS 1055991-02-0)
- Cyclo(L-Leu-trans-4-hydroxy-L-Pro) (CAS 115006-86-5)
- Cyclo(-Arg-Ala-Asp-D-Tyr-Lys) (CAS 1193347-53-3)
- Cyclo-(L-tyrosylglycyl) (CAS 1217777-38-2)
- Cyclo(-Gln-Trp-Phe-Gly-Leu-Met) (CAS 125989-12-0)
- Cyclo(-Gly-Arg-Gly-Asp-Ser-Pro-Ala) (CAS 128857-77-2)
- Cyclo(-Ala-Ser) (CAS 13174-73-7)
Recommended Standards
- 1-methyl-2,4-dioxo-7-phenyl-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-5-carboxylic acid (CAS 889941-16-6)
- 5-Fluorobenzoxazol-2(3H)-one (CAS 13451-79-1)
- 1-Amino-3,6,9,12-tetraoxapentadecan-15-oic acid (CAS 663921-15-1)
- (3-Allyl-2,4-dioxo-1,3-thiazolidin-5-yl)acetic acid (CAS 868212-21-9)
- Methyl [2-(cyclopropylamino)-6-oxo-1,4,5,6-tetrahydropyrimidin-5-yl]acetate (CAS 1379811-77-4)
- Methyl 2-bromo-6-(methylamino)benzoate (CAS 2654087-90-6)
- Sitagliptin Impurity 75 (CAS 1334244-24-4)
- 1-Cyclopentyl-5-(propoxymethyl)-1H-pyrazole-4-sulfonyl chloride (CAS 1856019-80-1)
- Allyl crotonate (CAS 20474-93-5)
- Tirzepatide Impurity 23 X TFA Salt (CAS CATO-C4X-324023)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com