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Quick Details

  • CAS No.: 59-51-8
  • Other Names: DL-METHIONINE
  • MF: C5H11NO2S
  • EINECS No.: 200-432-1
  • Place of Origin: China (Mainland)
  • Type: Feed Grade Amino Acids
  • Efficacy: Feed Preservatives
  • Brand Name: labeyond
  • Model Number: 59-51-8
  • M.P.: 284 °C (dec.)(lit.)
  • storage temp.: 0-6°C
  • Density: 1.34g/cm3
  • Water Solubility: 2.9 g/100 mL (20°C)
  • Assay: ≥ 98.5 %
  • Appearance: White crystalline powder
  • Loss on Drying: ≤ 0.50 %
  • Heavy Metals(as Pb): ≤0.002 %
  • Arsenic(as As): ≤0.0002 %
  • Chloride (as Cl): ≤0.2 %

Packaging & Delivery

Packaging Details 25KGS/BAG,DRUM
Delivery Time upon contract
Product Description



Product Name



(R,S)-2-Amino-4-methylsulfanyl-butyricacid;(RS)-2-Amino-3-methylthiobutansαure;4-Methylmercapto-2-aminobutyricacid;alpha-Amino-gamma-methylmercaptobutyric acid;Amurex;Banthionine;butanoicacid,2-amino-4-(methylthio)-,DL-;Cynaron



Molecular formula


Molecular Weight


Molecular Structure


Physical and Chemical Properties


284 °C (dec.)(lit.)

storage temp. 




Water Solubility 

2.9 g/100 mL (20 ºC)


General Description

White crystalline powder


Amino acids for Feed additives



Storage condition

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





White crystalline powder


≥ 98.5 %

Melting Point

284 °C (dec.)(lit.)

Loss on Drying

≤ 0.50 %

Heavy Metals(as Pb)   

≤0.002 %

Arsenic(as As)

≤0.0002 %

Chloride (as Cl)

≤0.2 %



Amino acids for Feed additives

Packaging & Shipping


Delivery Detail:  within 7-10 days after order confirmatio

Company Information

Labeyond Chemicals Co., Ltd. is a China-based supplier specializing in chemicals and technology import and export for years.

Established by well-experienced management, Mr Hunter Guo, Labeyond’s main business categories include APIs and Intermediates, Personal Care and Cosmetic Ingredients, Bulk Vitamins and Industrial Chemicals. Core products such as antibiotics, steroid hormones, antiseptic, UV absorbers, hair dyes and cable insulation materials are major and regular contribution to our turnover.

Our Enterprise Vision: To be a respected supplier from China, and a Preferred Source of Procuring Chemicals.

Our Enterprise Value: Commitment; Positive; Enterprising; Gratefulness.



There is no any quality claim after sale, how do you make it?

1. Our staff are all experienced and with chemistry related major background, they will study and confirm what EXACT PRODUCT YOU NEED!

2. Free sample or Pre-shipment sample are available for NEW Project of NEW customers before commercial purchasing.

3. Third Party Inspection like SGS can be arranged according to requirement.

4. On-Spot QC in our APPROVED associated production bases with necessary certification like GMP, ISO etc.

5. Routine PLANT AUDIT by techniques from us or customers.

How can you guarantee the quality we receive is same as the sample or specification?

1. Third Party like CIQ, SGS inspection before shipment upon request.

2. In Case of PSS we will hold the cargo until approval from customer side.

3. We have clear and detailed quality clause in contract with manufacturer, if any discrepancy of quality/quantity, they will take responsibility.

I put order and pay to you, how do you pack and deliver my cargo to me?

We have strict training process about SOP of Packing and Shipping.

Detailed SOP profile is available for different mode like Safe Cargo and Dangerous Cargo by

Sea, Air, Van or even Express Shipment.

How to do if my cargo fell into the sea?

That won’t happen. Haha.

If that happened, you are very lucky, you can claim a big money with the Insurance

Company, we always put Insurance on half of you before shipment.

I need the material urgently, hurry! Hurry!ok?

Let’s pray you will receive the cargo in a wink.Joking!

Don’t worry, Fast and On-time delivery are the key concerns in our mind. We always book

shipment through reputed liner even their charge are higher to us.


Will your company be missing after we pay you in advance?

We do chemicals in life! We will never get missing.

Is there a solution? That our payment are safe, and shipment proceed on time?

You can use Trade Assurance Service by Alibaba Group. Pls refer to the link for more


We don’t know you at all, how can we trust you?

You are always warm welcomed to visit us at any time.

Before we start B2B, Alibaba has audited our company on-spot and approved our credit.

Commitment is the No.1 Point of our Enterprise’s Value.


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Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
Trade Assurance
China (Mainland) | Trading Company
Transaction Level:
Supplier Assessments:
5 Transactions 1,000+
The supplier’s transactions conduted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $73,000
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