CAS NO 59-92-7 L-dopa

Basic Info

Model No.: CAS NO 59-92-7

Certification: ISO, FDA, HACCP

Assay Method: HPLC-MS, GPC, HPLC

Application Form: Other

Application: Health Care Products, Medicine

State: Powder

Extract Source: Other

CAS No.:: 59-92-7

MF:: C9H11NO4

Grade: Chemicals

MW: 197.18800

MP: 276-278 °C(lit.)

Refractive Index:: -12 ° (C=5, 1mol/L HCl)

Additional Info

Packaging:  in 25kg drum

Productivity: 10000kg per month

Brand: zhishang

Transportation: Ocean,Land,Air

Place of Origin: Shandong, China (Mainland)

Supply Ability: in stock

Certificate: ISO CE

HS Code: 59-92-7

Port: Shanghai,Tianjin,Qingdao

Product Description

CAS NO 59-92-7 L-dopa

Dopa is contained in some legumes and oxidatively polymerizes under the action of oxidase to produce melanin. The pods of some legumes turn black when they mature. Human and animal hair, squid ink law, watermelon seed coat and other melanin also belong to this type of melanin. The amino acid levodopa was extracted from the seeds of Mucuna sempervirens Hemsl. The extraction method is as follows: the quinoa crushed, with 30% ethanol and 0.1% acetic acid mixture of three times at room temperature, each time 24h. Filtration, the extract. The extract was concentrated under reduced pressure (21.3 kPa) to precipitate crystals, which were allowed to stand overnight at 0-10 ° C, filtered, and crude levodopa. The crude product was dissolved with 1N hydrochloric acid and filtered with activated charcoal. The filtrate was added with a small amount of vitamin C and neutralized with 2N ammonia to pH 3.5 to precipitate a large amount of crystals. 0-10 ℃ stand 4h, filtered. The filter cake is washed twice with distilled water containing a small amount of vitamin C and once with acetone. 60-70 ℃ dried levodopa. To soybean meal, yield of about 2%. Levodopa can also be oxidized by L-tyrosine. Tyrosine dissolved in formic acid phosphate, warmed to 40 ℃ for 12h, diluted with 20 times of distilled water. Dilution of strongly acidic styrene-based cation exchange resin adsorption of unreacted tyrosine, and then after the film manipulation of the finished product.


Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture. Store protected from light.

Product expansion

1> Cosmetic Raw Materials: Cosmetics is a variety of raw materials through a reasonable deployment of processing from the compound mixture. Cosmetics with a wide range of raw materials, different performance. According to the Raw Material properties and uses of cosmetics, can be divided into matrix materials and auxiliary raw materials in two categories.

2> Active Pharmaceutical Ingredients(API): API refers to the raw materials in the production of various types of preparations, which is the active ingredient in powder,crystal and paste for medicine use through chemical synthesis,plant extract, and preparations of biotechnology institute.

3> Fragrance And Spices: Spices are an important part of fine chemicals, it is composed of natural spices, synthetic spices and single fragrance.

4> Organic Raw Material: Intermediates are also known as organic intermediates. The use of coal tar or petroleum products as raw materials to produce dyes, resins, additives, and other intermediates.

5> Chemicals Used In Paints: Paint, the traditional Chinese name is paint. So-called coating is coated on the surface of the object that be protected or be adornment, and with the continuous film coating to form strong adhesion.

6> Pharmaceutical Intermediates: The so-called pharmaceutical intermediates, refers to the production of pharmaceutical products in the process, the use of raw materials, materials, accessories and other intermediate products.

7> Agricultural Chemicals: Research and agriculture related chemical, including pesticide, plant growth regulator, fertilizer, compound fertilizer, herbicide etc.

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