Alendronate Sodium Trihydrate CAS 121268-17-5 Assay (on Dried Basis) 98.0%~102.0%

Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer of Alendronate Sodium Trihydrate (CAS: 121268-17-5) with high quality. Ruifu Chemical can provide worldwide delivery, competitive price, excellent service, small and bulk quantities available. Purchase Alendronate Sodium Trihydrate, Please contact: alvin@ruifuchem.com

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 (-20℃) and well-ventilated warehouse away from incompatible substances. Keep away from sunshine; avoid fire and heat sources; avoid moisture. Keep away from strong oxidizing agents.
Shipping: Deliver to worldwide by air, by FedEx / DHL Express. Provide fast and reliable delivery. 

Alendronate Sodium
C4H12NNaO7P2·3H2O 325.12
Phosphonic acid, (4-amino-1-hydroxybutylidene)bis-, monosodium salt, trihydrate.
Sodium trihydrogen (4-amino-1-hydroxybutylidene)diphosphonate, trihydrate [121268-17-5].
» Alendronate Sodium contains not less than 98.0 percent and not more than 102.0 percent of C4H12NNaO7P2, calculated on the dried basis.
Packaging and storage- Preserve in well-closed containers. Store at room temperature.
USP Reference standards <11>-
USP Alendronate Sodium RS
Identification-
A: Infrared Absorption <197M>.
B: It meets the requirements of the flame test for Sodium <191>.
Loss on drying <731>- Dry it at a pressure not exceeding 5 mm of mercury at 140 to constant weight: it loses not less than 16.1% and not more than 17.1% of its weight.
Heavy metals, Method III <231>: 0.001%.
Chromatographic purity-
Borate solution and Diluent- Prepare as directed in the Assay.
Buffer solution- Transfer 5.88 g of sodium citrate dihydrate and 2.84 g of anhydrous dibasic sodium phosphate to a 2-L volumetric flask, dilute with water to volume, and mix. Adjust with phosphoric acid to a pH of 8, and pass the solution through a filter having a 0.5-µm or finer porosity.
9-Fluorenylmethyl chloroformate solution- Prepare a solution in acetonitrile containing about 4 mg of 9-fluorenylmethyl chloroformate per mL. Prepare this solution fresh just prior to use.
Solution A- Prepare a filtered and degassed mixture of Buffer solution and acetonitrile (17:3).
Solution B- Prepare a filtered and degassed mixture of acetonitrile and Buffer solution (7:3).
Mobile phase- Use variable mixtures of Solution A and Solution B as directed for Chromatographic system. Make adjustments if necessary (see System Suitability under Chromatography <621>).
Standard stock solution- Prepare a solution of USP Alendronate Sodium RS in Diluent having a known concentration of about 0.6 mg per mL.
Standard solution- Transfer 5.0 mL of the Standard stock solution to a 50-mL polypropylene, screw-cap centrifuge tube containing 5 mL of Borate solution. Add 5 mL of acetonitrile and 5 mL of 9-Fluorenylmethyl chloroformate solution, and shake for 45 seconds. Allow to stand at room temperature for 30 minutes. Add 20 mL of methylene chloride, and shake vigorously for 1 minute. Centrifuge for 5 to 10 minutes, and use a portion of the clear upper aqueous layer.
Diluted standard solution- Dilute a portion of the Standard stock solution with Diluent to obtain a solution having a known concentration of about 0.6 µg per mL. Using 5 mL of this solution, proceed as directed for the Standard solution, beginning with “to a 50-mL polypropylene, screw-cap centrifuge tube.”
Reagent blank- Using a 5.0-mL portion of Diluent, proceed as directed for Standard solution, beginning with “to a 50-mL polypropylene, screw-cap centrifuge tube.”
Test solution- Transfer about 30 mg of Alendronate Sodium, accurately weighed, to a 50-mL volumetric flask, dissolve in and dilute with Diluent to volume, and mix. Using a 5.0-mL volume of this solution, proceed as directed for Standard solution, beginning with “to a 50-mL polypropylene, screw-cap centrifuge tube.”
Chromatographic system (see Chromatography <621>)- The liquid chromatograph is equipped with a 266-nm detector and a 4.1-mm × 25-cm column that contains packing L21. The flow rate is about 1.8 mL per minute. The column temperature is maintained at about 45. The chromatograph is programmed as follows.
Time (minutes) Solution A (%) Solution B (%) Elution
0 100 0 equilibration
0-15 100→50 0→50 linear gradient
15-25 50→0 50→100 linear gradient
25-27 0→100 100→0 linear gradient
27-32 100 0 isocratic
Chromatograph the Standard solution and the Diluted standard solution, and record the peak responses as directed for Procedure: the tailing factor for the main peak in the chromatogram of the Standard solution is not more than 2.0; and the peak at that locus in the chromatogram of the Diluted standard solution is detectable with a signal-to-noise ratio of not less than 3.
Procedure- Separately inject equal volumes (about 20 µL) of the Test solution and the Reagent blank into the chromatograph, record the chromatograms, and measure the responses for all the peaks. Disregard any peak corresponding to those obtained from the Reagent blank. Calculate the percentage of each impurity in the portion of Alendronate Sodium taken by the formula:
100(ri / rs)
in which ri is the area of each impurity peak, and rs is the sum of all impurity peaks and the main peak: not more than 0.1% of any individual impurity is found, and not more than 0.5% of total impurities is found.
Assay-
Buffer solution- Transfer 14.7 g of sodium citrate dihydrate and 7.05 g of anhydrous dibasic sodium phosphate to a 1-L volumetric flask, dilute with water to volume, mix, and adjust with phosphoric acid to a pH of 8.
Diluent- Dissolve 29.4 g of sodium citrate dihydrate in water in a 1-L volumetric flask, dilute with water to volume, and mix.
Borate solution- Dissolve 19.1 g of sodium borate in water in a 1-L volumetric flask, dilute with water to volume, and mix.
9-Fluorenylmethyl chloroformate solution- Prepare a solution in acetonitrile containing about 0.5 mg of 9-fluorenylmethyl chloroformate per mL. Prepare this solution fresh just prior to use.
Mobile phase- Prepare a filtered and degassed mixture of Buffer solution, acetonitrile, and methanol (70:25:5). Make adjustments if necessary (see System Suitability under Chromatography <621>).
Standard stock preparation- Prepare a solution of USP Alendronate Sodium RS in Diluent having a known concentration of about 0.1 mg per mL. Calculate the concentration, CS, of anhydrous alendronate sodium in this solution.
Standard preparation- Transfer 5.0 mL of the Standard stock preparation to a 50-mL polypropylene, screw-cap centrifuge tube containing 5 mL of Borate solution. Add 5 mL of 9-Fluorenylmethyl chloroformate solution, and shake for 30 seconds. Allow to stand at room temperature for 25 minutes. Add 25 mL of methylene chloride, and shake vigorously for 1 minute. Centrifuge for 5 to 10 minutes. Use a portion of the clear upper aqueous layer.
Reagent blank- Using 5.0 mL of Diluent, proceed as directed for Standard preparation, beginning with “to a 50-mL polypropylene, screw-cap centrifuge tube.”
Assay stock preparation- Transfer about 25 mg of Alendronate Sodium, accurately weighed, to a 250-mL volumetric flask, dissolve in and dilute with Diluent to volume, and mix.
Assay preparation- Using 5.0 mL of the Assay stock preparation, proceed as directed for the Standard preparation, beginning with “to a 50-mL polypropylene, screw-cap centrifuge tube.”
Chromatographic system (see Chromatography <621>)- The liquid chromatograph is equipped with a 266-nm detector and a 4.1-mm × 25-cm column that contains packing L21. The flow rate is about 1.2 mL per minute. The column temperature is maintained at about 35. Chromatograph the Standard preparation, and record the peak responses as directed for Procedure: the column efficiency is not less than 1500 theoretical plates, the tailing factor is not more than 1.5, and the relative standard deviation for replicate injections is not more than 2.0%.
Procedure— Separately inject equal volumes (about 10 µL) of the Standard preparation, the Assay preparation, and the Reagent blank into the chromatograph, record the chromatograms, and measure the responses for the major peaks. Calculate the quantity, in mg, of C4H12NNaO7P2 in the portion of Alendronate Sodium taken by the formula:
DCS (rU / rS)
in which D is the dilution factor for the Assay stock preparation; CS is as defined under the Standard stock preparation; and rU and rS are the peak area responses for alendronic acid obtained from the Assay preparation and the Standard preparation, respectively.  

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. 

Risk Codes R22 - Harmful if swallowed
R36/37/38 - 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.
S60 - This material and its container must be disposed of as hazardous waste.
WGK Germany 3
RTECS SZ6523500

1. Alendronate Sodium Trihydrate (CAS: 121268-17-5) is used as a bone resorption inhibitor, farnesyl diphosphate synthase inhibitor and CD45 protein tyrosine phosphatase inhibitor. A robust inhibitor of bone resorption that induces apoptosis. Alendronate inhibits the migration and invasion of PC-3 cells (sc-2220) by interfering with the mevalonate pathway. Additionally, Alendronate, Sodium Salt is an inhibitor of CD45RC and MMP. Alendronate Sodium, an aminobisphosphonate compound, has been effectively used for the treatment of osteolysis, Paget′s disease and osteoporosis.
2. Alendronate Sodium Trihydrate is a bisphosphonate used as a bone reabsoption inhibitor
3. Alendronate Sodium Trihydrate is a dopamine receptor agonist, antiParkinsonian
4. Alendronate Sodium Trihydrate Inhibits bone resorption and increases bone density.