1-Ethyl-4-ethynyl-1H-pyrazole-5-carboxylic acid CAS 1354704-99-6
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 1354704-99-6 |
| Molecular Formula | C8H8N2O2 |
| Molecular Weight | 164.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-Ethyl-4-ethynyl-1H-pyrazole-5-carboxylic acid (CAS 1354704-99-6) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C8H8N2O2. Molecular weight: 164.16 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C8H8N2O2 |
| Molecular Weight | 164.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- Methyl 4-ethynyl-1-methyl-1h-pyrazole-3-carboxylate (CAS 1354704-40-7)
- 3-(4-Ethynyl-1H-pyrazol-1-yl)propanoic acid (CAS 1354704-79-2)
- 1-Ethyl-4-ethynyl-1H-pyrazole-3-carboxylic acid (CAS 1354704-82-7)
- 2-(4-Ethynyl-3-methyl-1H-pyrazol-1-yl)acetic acid (CAS 1354705-01-3)
- 2-(4-Ethynyl-5-methyl-1H-pyrazol-1-yl)acetic acid (CAS 1354706-52-7)
- Methyl 2-(4-ethynyl-1H-pyrazol-1-yl)acetate (CAS 1823783-45-4)
- Methyl 4-ethynyl-1-methyl-1H-pyrazole-5-carboxylate (CAS 1823783-51-2)
- Methyl 5-ethynyl-1-methyl-1H-pyrazole-3-carboxylate (CAS 19762-23-3)
Recommended Standards
- 3-(1-Ethyl-1h-pyrazol-3-yl)propiolic acid (CAS 1354704-55-4)
- 2-(Benzo[c][1,2,5]oxadiazol-5-yl)ethanol (CAS 136080-71-2)
- 3-Amino-4-hydroxy-5-methoxybenzonitrile (CAS 1362094-92-5)
- 4-(4-(Bis(2-chloroethyl)amino)benzylidene)-2-phenyloxazol-5(4H)-one (CAS 18776-75-5)
- Dimethyl 3-aminobenzo[b]thiophene-2,5-dicarboxylate (CAS 181282-81-5)
- 2-(5-((1,3-Dioxoisoindolin-2-yl)methyl)-1,2,4-oxadiazol-3-yl)acetamide (CAS 1809484-44-3)
- Valacyclovir-d4 Hydrochloride (CAS 1331910-75-8)
- Triethoxy(1H,1H,2H,2H-nonafluorohexyl)silane (CAS 102390-98-7)
- (4AR,6R,7R,8S,8aS)-6-methoxy-2-phenylhexahydropyrano[3,2-d][1,3]dioxine-7,8-diyl dibenzoate (CAS 53598-03-1)
- Semaglutide impurity 255 (CAS CATO-C4X-2226255)
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 13829788188 / jacky.chen@cato-chem.com