Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer of 4-Chloro-7-Tosyl-7H-Pyrrolo[2,3-d]pyrimidine (CAS: 479633-63-1) with high quality, intermediate of Tofacitinib Citrate (CAS: 540737-29-9). Ruifu Chemical has been supplying pharmaceutical intermediates and APIs, fine chemicals more than 15 years. Ruifu Chemical can provide worldwide delivery, competitive price, excellent service.
Purchase Tofacitinib Citrate Intermediates or other products, please contact us by e-mail: alvin@ruifuchem.com
| Chemical Name | 4-Chloro-7-Tosyl-7H-Pyrrolo[2,3-d]pyrimidine |
| Synonyms | 4-Chloro-7-Tosyl-7H-Pyrrolo[2,3-δ]pyrimidine; 4-Chloro-7-(p-Toluenesulfonyl)-7H-Pyrrolo[2,3-d]pyrimidine; 4-Chloro-7-(p-Toluenesulfonyl)-7H-Pyrrolo[2,3-δ]pyrimidine; 4-Chloro-7-[(4-Methylbenzene)sulfonyl]-7H-Pyrrolo[2,3-d]pyrimidine; Tofacitinib Impurity R |
| Stock Status | In Stock, Commercial Production |
| CAS Number | 479633-63-1 |
| Molecular Formula | C13H10ClN3O2S |
| Molecular Weight | 307.75 g/mol |
| Melting Point | 145.0 to 155.0℃ |
| Density | 1.49 g/cm3 |
| Storage Temperature | Store Long-Term at 2-8℃ |
| Shipping Conditions | Ambient |
| COA & MSDS | Available |
| Origin of Product | Shanghai, China |
| Product Categories |
Pharmaceutical Intermediates |
| Brand | Ruifu Chemical |
| Items | Specifications | Results |
| Appearance | White to Light Yellow Powder | Off-White Powder |
| 1H NMR Spectrum | Conforms to Structure | Conforms |
| Purity / Analysis Method | >98.0% (HPLC Area) | 99.9% |
| Identified Impurity 1 | ≤0.20% (HPLC Area) | 0.004% |
| Identified Impurity 2 | ≤0.15% (HPLC Area) | 0.009% |
| Identified Impurity 3 | ≤1.50% (HPLC Area) | 0.10% |
| Total Impurities | ≤2.00% (HPLC Area) | 0.14% |
| Any Unspecified Impurity | ≤0.20% (HPLC Area) | 0.03% |
| Melting Point | 145.0~155.0℃ | 150.0~151.0℃ |
| Loss on Drying | <2.00% | 0.22% |
| Water by Karl Fischer | <1.00% | 0.09% |
| Residue on Ignition | <0.50% | 0.16% |
| Ni Metal Residue | <60ppm (Calculated on Dried Basis) | 0.05ppm |
| Conclusion | The product has been tested and complies with the given specifications | |
| Application | Intermediate of Tofacitinib Citrate (CAS: 540737-29-9) | |
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 (2~8℃), 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 | Xn - Harmful |
| Risk Codes | 22 - Harmful if swallowed |
| Hazard Class | IRRITANT |
| HS Code | 2933599099 |
4-Chloro-7-Tosyl-7H-Pyrrolo[2,3-d]pyrimidine (CAS: 479633-63-1), is an important intermediate in the synthesis of Tofacitinib Citrate (CAS: 540737-29-9).
Tofacitinib Citrate, is a king of drugs developed by the US pharmaceutical company Pfizer for treating rheumatoid arthritis, trade name Xeljanz, for the treatment of methotrexate inadequate response or intolerance to severe active rheumatoid arthritis (RA) in adult patients. This product is a Janus kinase inhibitor, administered twice daily.
November 6, 2012, the US Food and Drug Administration (FDA) and Pfizer jointly announced Tofacitinib Citrate is approved for the treatment of methotrexate inadequate response or intolerance to severe active rheumatoid joints arthritis (RA) in adult patients.