Levodopa 59-92-7

Details:

Product introduction:

Density	1.3075 (rough estimate)
Melting Point	276-278 °C (lit.)
Boling Point	334.28°C (rough estimate)
Specific Rotation(α)	-11.7 º (c=5.3, 1N HCl)
Flash Point	225°C
Water Solubility	Slightly soluble in water, dilute hydrochloric acid and formic acid. Insoluble in ethanol.
Solubility	Easily soluble in dilute hydrochloric acid and formic acid, soluble in water, insoluble in ethanol, benzene, chloroform and ethyl acetate
Vapor Presure	7.97E-09mmHg at 25°C
Appearance	White to milky white crystalline powder
Color	White to creamy
Merck	14,5464
BRN	2215169
pKa	2.32(at 25℃)
Storage Condition	2-8°C
Stability	Stable. Incompatible with strong oxidizing agents. Light and air sensitive.
Sensitive	Sensitive to light and air
Refractive Index	-12 ° (C=5, 1mol/L H
MDL	MFCD00002598
Physical and Chemical Properties	melting point 295°C specific optical rotation -11.7 ° (c = 5.3, 1N HCl)
Use	An effective drug for the treatment of paralysis of shock, mainly used for Parkinson's syndrome, etc

Exam

Authoritative Data Verified Data

clarity and color of acidic solution

take 0.4g of this product and add 10ml of hydrochloric acid solution (9-l00) to dissolve. The solution should be clear and colorless; If it is colored, it should be used with yellow-green or yellow -2 standard colorimetric solution (General rule 0901 first method). Comparison, not deeper.

chloride

take 0.30g of this product and check it according to law (General rule 0801). Compared with the control solution made of 6.0ml of standard sodium chloride solution, it should not be more concentrated (0.02%).

other amino acids

take this product, add hydrochloric acid solution (9-1000) to dissolve and make 10mg solution (1) and 0.10mg solution (2) per 1 mL respectively, and containing lOmg and tyrosine O. 10mg solution (3). According to the thin layer chromatography (General 0502) test, absorb 10 u1 of each of the above three solutions, respectively point on the same microcrystalline cellulose thin layer plate (microcrystalline cellulose 0.15g/10 cm2), with n-butanol-glacial acetic acid-water (2:1:1) as the developing solvent, the solvent was dispersed in air, spray with 10% ferric chloride solution and 5% potassium ferricyanide solution of equal volume mixed solution (ready to use new system), immediately check. Solution (1) should not be deeper than the main spot of solution (2) if it shows impurity spots; And solution (3) should show the respective spots of levodopa and tyrosine.

loss on drying

take this product, dry to constant weight at 105°C, weight loss shall not exceed 1.0% (General rule 0831).

ignition residue

take l.Og of this product and check it according to law (General rule 0841). The residue left shall not exceed 0.1%.

Heavy metals

The residue left under the item of taking the ignition residue shall not contain more than 10 parts per million of heavy metal when examined by law (General Principles 0821, Law II).

 

Our company specializes in processing and selling chemical raw materials, chemical products, pharmaceutical intermediates, veterinary medicine intermediates, dye intermediates, pigments, cosmetics raw materials and chemical reagents,  

Our company has a number of sales team, service and information feedback vertical integration of a sound marketing network, products are sold throughout the country and exported to South Asia, Europe, America, Africa and other more than 20 countries and regions.  

Companies adhering to the "pursuit of quality, innovation and development" business philosophy, to serve as a foundation, for the survival by the quality, seek development by science and technology, adhere to quilty comes first,fair price,good sense of customer service and responsibility. in the future hebei Nengqian import and export trade Co.,Ltd will always hold "integrity, innovation" business philosophy, to achieve honesty management, on the way of specialization, internationalization,  Keep moving!  

 

 

 

 

 

Our advantages: 

1, High quality with competitive price:

1) Standard:BP/USP/EP/Enterprise standard

2) All Purity≥99%

3) We are manufacturer and can provide high quality products with factory price.

 2, Fast and safe delivery

1) Parcel can be sent out in 24 hours after payment.Tracking number available

2) Secure and discreet shipment.Various transportation methods for your choice.

3) Customs pass rate ≥99%

4) We have our own agent/remailer/distributor who can help us ship our products very fast and safe,

and we have stock in there for transferring.

Product Packaging：

1) 1kg/bag (1kg net weight, 1.1kg gross weight, packed in an aluminum foil bag)

2) 25kg/drum (25kg net weight, 28kg gross weight; Packed in a cardboard-drum with two plastic-bags inside; Drum Size: 510mm high, 360mm diameter)

 Storage：

Stored in a cool and dry well-closed container. Keep away from moisture and strong light/heat.

Delivery：

Usually within3-5 working days after full payment.

transport：

EMS,DHL, TNT, UPS ,FEDEX, BY AIR, BY SEA

DHL Express, FedEx and EMS for quantity less than 50KG, usually called as DDU service; 

Sea shipping for quantity over 500KG; And air shipping is available for 50KG above;

For high value products, please select air shipping and DHL express for safe;

Our Service:
1. Fast Delivery: We can delivery within 24 hours upon receipt of your payment.
2. Quality can be promised. Hot sell to Worldwide.
3. Payment Terms: T/T,, t/t
4. Free Sample available at any time.
5. Tracking your order at any time. Inform your order's further new situation at any time.
6. Package: Professional packing with professional materials.

FAQ: 
1.Are you a trade company or factory   
We are a  factory with our own trading company.  

2.How do you control the quality   
Our factory is equipped with professional technicians to control quality, out inspectors take sample for testing every 2 hours to ensure the quality of our production. We also accept BV, SGS or any other Third-party inspection.   

3.How long is lead time   
We deliver goods within 3 days for small order, 7-10 days for bulk order.   

4. Where is your factory located  How can I visit the factory   
 Our factory located in HEBEI, China.

5.Can i get some samples  
  Yes, we can supply free sample, but the shipping cost be paid by our customers. 

6.How to start orders or make payments  
  Proforma invoice will be sent first after confirmation of order, enclosed our bank information.Payment by T/T,  

7. How to confirm the Product Quality before placing orders  
  You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. 
8. How long is lead time

We deliver goods within 3 days for small order, 7-10 days for bulk order.

 

9. How do you treat quality complaint

  First of all, our quality control will reduce the quality problem to near zero. If there is a realquality problem caused by us, we will send you free goods for replacement or refund your loss.