Sildenafil Citrate Intermediate CAS 139756-02-8 Purity >98.0% (HPLC)
Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer of 4-Amino-1-Methyl-3-Propyl-5-Pyrazolecarboxamide (CAS: 139756-02-8) with high quality, intermediate of Sildenafil Citrate (CAS: 171599-83-0). Ruifu Chemical can provide worldwide delivery, competitive price, excellent service, small and bulk quantities available. Purchase Sildenafil Citrate Intermediates, Please contact: alvin@ruifuchem.com
| Chemical Name | 4-Amino-1-Methyl-3-Propyl-5-Pyrazolecarboxamide |
| Synonyms | 4-Amino-1-Methyl-3-n-Propyl-5-Pyrazolecarboxamide; 4-Amino-1-Methyl-3-Propylpyrazole-5-Carboxamide; 4-Amino-1-Methyl-3-N-propyl-1H-Pyrazole-5-Carboxamide; 4-Amino-2-Methyl-5-Propyl-2H-Pyrazole-3-Carboxylic Acid Amide; Sildenafil Amide Impurity; Sildenafil Impurity 8 |
| Stock Status | In Stock, Commercial Production |
| CAS Number | 139756-02-8 |
| Molecular Formula | C8H14N4O |
| Molecular Weight | 182.22 g/mol |
| Melting Point | 98.0~101.0℃(lit.) |
| Density | 1.32±0.10 g/cm3 |
| Solubility | Soluble in Chloroform, Ethyl Acetate, Methanol |
| COA & MSDS | Available |
| Place of Origin | Shanghai, China |
| Product Categories |
Pharmaceutical Intermediates |
| Brand | Ruifu Chemical |
| Items | Specifications | Results |
| Appearance | White to Light Yellow Powder | Off-White Powder |
| Melting Point | 98.0~101.0℃ | 99.0~100.0℃ |
| Water by Karl Fischer | <0.50% | 0.08% |
| Residue on Ignition | <0.20% | <0.20% |
| Singl Impurity | <1.00% | Conforms |
| Total Impurities | <2.00% | Conforms |
| Purity / Analysis Method | >98.0% (HPLC) | 99.9% |
| Infrared Spectrum | Conforms to Structure | Conforms |
| Proton NMR Spectrum | Conforms to Structure | Conforms |
| Conclusion | The product has been tested and complies with the given specifications | |
| Application | Main Intermediate of Sildenafil Citrate (CAS: 171599-83-0) | |
Package: Fluorinated Bottle, Aluminium foil bag, 25kg/Cardboard Drum, or according to customer's requirement.
Storage Condition: Keep the container tightly closed and store in a cool, dry, well-ventilated warehouse away from incompatible substances. Keep away from sunshine; avoid fire and heat sources; avoid moisture.
Shipping: Deliver to worldwide by air, by FedEx / DHL Express. Provide fast and reliable delivery.
How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.
Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.
Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.
Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
Hazard Symbols Xi - Irritant
Risk Codes 36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36 - Wear suitable protective clothing.
WGK Germany 3
HS Code 2933199090
4-Amino-1-Methyl-3-Propyl-5-Pyrazolecarboxamide (CAS: 139756-02-8) is a multi-substituted pyrazolecarboxamide used in the synthesis of Sildenafil Citrate (CAS: 171599-83-0). It is a member of pyrazoles and a monocarboxylic acid amide.
Sildenafil Citrate is an orally active selective type 5 cgmp phosphodiesterase inhibitor that is used in the treatment of erectile dysfunction and primary pulmonary hypertension.
