Basic Info:

  • Chemical Synonym(s): (2S,3S)-2-Amino-3-methylpentanoicacid; (2S,3S)-Ile; L-Isoieucine; Z-(s,S)-isoleucine; H-lle-OH; Expand
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  • CAS Number: 73-32-5
  • Chemical Formula:


  • MSDS: Download


Melting point
288 °C (dec.) (lit.)
1.035 g/cm3
Boiling Point
225.8ºCat 760 mmHg
Flash Point
2.32, 9.76(at 25℃)
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We help you source L-Isoleucine in China

Our Advantages:

We are currently dealing in lipoic acid, calcium gama-hydroxybutyrate and hyaluronic acid.

We have a great advantage in the supply chain of amino acids, a good amino acid plant needs to have fermentation advantages, high costs and barriers, and also high environmental requirements.

We know every amino acid plant in China and can provide you with the most accurate information.

We have a 20+ year track record of working with suppliers in China and rating reports on them, and we keep our suppliers updated with the latest news so our customers can get the latest supplier reports. We know the market well and have early warning notifications on upstream raw material prices to help you build a stable supply chain.

When selecting suppliers, our procurement specialists will audit the qualification of suppliers, conduct thorough investigations such as field visits and sample testing, and make ratings to ensure the authenticity and legality of supplier information.

We have a long-term stable cooperation with GLP laboratories, encounter customer test results and supplier test results do not match the situation, we will commission a third party to test to ensure the accuracy, authenticity and reliability of the experimental results. In this way, we can effectively control the product quality problems.

We have a long-term cooperative warehouse and can follow up packaging and labeling according to safety regulations and customer requirements. In order to effectively prevent damage to the goods in transit, we have prepared various reinforcement measures and packaging solutions.

We have a number of international freight companies with whom we have long-standing cooperation, and we can choose several route options according to the customer's requirements. For more difficult or urgent orders, we will prepare several alternative solutions to ensure safe and timely delivery.


We promise to immediately and unconditionally exchange or return the goods if they have quality problems. Our employees who deal with after-sales issues have many years of international work experience and are familiar with various processes in multinational work, so they can communicate and deal with after-sales issues without any obstacles.

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L-Isoleucine has various nicknames such as Isoleucine, Iso-Leucine, and 2-Amino-3-(3,4-dihydroxy phenyl)propanoic acid.

It is an essential amino acid that it can create from other molecules in the human body.

It has six carbon atoms with two side chains. IsoleucineIt is classified as a hydrophobic amino acid since its side chain is uncharged at physiological pH. It can find it in high concentrations in human muscle tissue, eggs, and milk products.

It is an alpha-amino acid essential in the human diet. It is synthesized from pyruvate by the enzyme L-isoleucyl-transferase. It can be manufactured by fermentation of sugars with Escherichia coli. 


L-Isoleucine is an essential amino acid that cannot be synthesized and can only be obtained from outside the body. It is available in abundant sources such as eggs, chicken, pork, beans, milk, cashews, and cereals.

It helps promote muscle recovery after training. It is a potent branched-chain amino acid that prevents muscle loss because it can be broken down and converted into glucose more quickly. Increasing glucose prevents damage to muscle tissue, making it particularly suitable for bodybuilders.

It has a role in detoxifying nitrogenous waste products such as ammonia, which is then excreted by the kidneys.

It is also essential for the production and formation of hemoglobin and the production of red blood cells.

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