DL-Methionine 59-51-8

Details:

Product introduction:

properties	DL-methionine is a white flake crystal or crystalline powder. Special odor. The taste was slightly sweet. Melting point 281 degrees (decomposition). 10% pH of the aqueous solution 5.6-6.1. No optical rotation. Stable to heat and air. Unstable to strong acids, can lead to demethylation. Soluble in water (3.3g/100ml,25 degrees), dilute acid and dilute solution. Very difficult to dissolve in ethanol, almost insoluble in ether.
Use	DL-methionine may be used as a nutritional supplement. The physiological effect is the same as that of L-type methionine, but the L-type is low in price (L-type is produced by DL-type), so DL-methionine is generally used. In oats, rye, rice, corn, wheat, peanut flour, soybeans, potatoes, spinach and other plant-based foods to improve amino acid balance. applicable to the prevention and treatment of liver disease and arsenic or benzene poisoning, can also be used for the treatment of dysentery and chronic infectious diseases caused by protein deficiency after malnutrition This product is a feed Nutrition Fortifier. Lack of methionine in livestock and poultry will cause dysplasia, weight loss, liver and kidney function, muscle atrophy, fur deterioration and so on. Feed added 1kg methionine, equivalent to the nutritional value of 50kg fish meal. The general amount of feed is 0,05%-0.2%. nutritional supplements. The physiological effect is the same as that of L-type methionine, but the L-type is low in price (L-type is produced by DL-type), so DL-methionine is generally used. In oats, rye, rice, corn, wheat, peanut flour, soybeans, potatoes, spinach and other plant-based food belonging to the restriction of amino acids. Added to the above foods to improve the amino acid balance. Requirements vary with cystine intake. The requirement for an adult male is 1.1g/d. Sea urchin and methionine related, sea urchin sweet and glycine, alanine related, bitter and valine related, flavor and glutamic acid and so on, so these amino acids can be formulated into flavoring agent. Still used for amino acid infusion, comprehensive amino acid preparation. According to China GB 2760-86 regulations can be used as spices. The content of commercial methionine is more than or equal to 98.5%, which is one of the essential amino acids for the growth of livestock and animals, and is the "skeleton" amino acid of biosynthetic protein, which has a strong regulatory effect on the metabolism of animals, widely used in medicine, food, feed and cosmetics and other fields. Which in medicine, can be used as the main component of amino acid infusion and compound amino acids, can also be used for the synthesis of medicinal vitamins, the use of its anti-fatty liver, can be used for the production of liver preparations; In food, for food amino acid fortification and processing of food and health products, can be used as nutritional supplements, due to special odor, so only for fish cake products; In the feed industry, the largest amount of methionine, used as feed Nutrition Fortifier, make up the balance of amino acids in feed additives, amino acid nutrition feed additives in varieties, methionine 60%, lysine accounted for 30%, other amino acids accounted for about 10%. used as a Biochemical reagent biochemical studies; Used in the culture of mammalian and insect cells with mixed isomers
range of use	adult male requirement: 1G/d. Can be safely used in food. It accounts for 3.1% of the total protein in food. Not for infants and young children food.
principle of action	DL-methionine is one of the essential amino acids for human body, and deficiency can cause liver and kidney disorders. It is especially important for the protection of liver function. Can promote hair, nail growth, and detoxification and enhance muscle activity and other effects.
content analysis	a sample of approximately mg was accurately weighed and transferred into a stopcock flask. Add 100ml of water, 5g of Dipotassium hydrogen phosphate, 2g of potassium dihydrogen phosphate and 2g of potassium iodide, and mix well until dissolved. Then 50ml of 0.1mol/L iodine solution was accurately measured, and the flask was closed and mixed. After standing for 30min, the excess iodine was titrated with 0.1mol/L sodium thiosulfate. At the same time, the blank test was carried out and the necessary correction was made. Each MIM 0.1mol/L iodine solution corresponds to 7.461mg of DL-methionine (C5HllNO2S).
toxicity	L-type: LD5029mmol/kg (rat, intraperitoneal injection);D-type: LD5035mmol/kg (rat, intraperitoneal injection). Safe for use in food (FDA,§ 172.320,2000).
usage limit	FDA,§ 172.320(2000):(1) not for infant food;(2) it accounts for 3.1% of the total protein in food. FEMA: same as "01115, isoleucine".
production method	methionine can be prepared by extraction, but there are the following methods in industry: 1. Rhone-Planck process 2. The consumption quota of DL-methionine process raw materials in dpoga: acrolein 480kg/t, methyl mercaptan 400kg/t, sodium cyanide 420kg/t. methionine of the D-configuration and the L-configuration have the same physiological action, and DL-type is often used, so it is advantageous to produce it synthetically. It is generally prepared by reacting acrolein with methyl mercaptan. A synthesis method using an acrylic aldehyde as a raw material is generally used. The condensation of Propylene aldehyde and methyl mercaptan in the presence of formic acid and copper acetate produces 3-methylthiopropionaldehyde. Then mixed with sodium cyanide and ammonium bicarbonate solution. The reaction at 90 °c gave methylthioethyl hydantoin. Without separation and purification, it can be heated with 28% sodium hydroxide solution to 180 C, hydrolysis to form sodium methionine. The final methionine was obtained by neutralization with hydrochloric acid. Each ton of product consumption of acrylic aldehyde 480kg, methyl mercaptan 400kg, sodium cyanide 420kg

 

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.