Isoleucine also called "different leucine," system named "alpha amino - beta - methyl pentanoic acid".Is one of the essential amino acids, belong to a kind of aliphatic neutral amino acids.English name c6h13no2 Iloleucine - 256 this product is a 131.17 L amino - 3 - methyl - 2 - pentanoic acid.Calculated on dry goods, including C6H13NO2 shall not be less than 98.5%.This product is a white crystal or crystalline powder;Odourless and slightly bitter taste.China H&Z® L-Isoleucine is slightly soluble in water, hardly soluble in ethanol.Take this product than the curl, precision said, adding 6 mol/L HCL solution, and shi xi into each 1 ml contains 40 mg of solution, in accordance with the measurement , curl is + 38.9 ° to + 38.9 °.

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L-Isoleucine CAS:73-32-5

L-Isoleucine Chemical Properties



Melting point:288°C (dec.)(lit.)

alpha:41º(c=4, 6N HCl)

Boiling point:225.8±23.0°C(Predicted)

density:1.2930 (estimate)

refractive index:40.5°(C=4, 6mol/L HCl)


solubility:1 M HCl: 50 mg/mL

pka:2.32, 9.76(at 25℃)

PH:5.5-6.5 (40g/l, H2O, 20℃)

optical activity:[α]20/D +41.0±1°, c = 5% in 6 M HCl

Water Solubility:41.2 g/L (50ºC)

L-Isoleucine CAS:73-32-5 Introduction:

L-Isoleucine is aliphatic amino acids ,one of twenty protein amino acids and one of eight essential for human body, also is branched-chain amino acids. It can promote protein synthesis and improve the level of growth hormone and insulin, to maintain balance in the body, can increase the body's immune function, treat mental disorders, to promote an increase in appetite and the role of anti-anemia, but also with the promotion of insulin secretion. Mainly used in medicine, food industry, protect the liver, liver role in muscle protein metabolism is extremely important. If lack, there will be physical failure, such as the state of coma. Glycogenetic and ketogenic amino can be used as nutritional supplements. For the amino acid infusion or oral nutritional additives.

L-Isoleucine CAS:73-32-5 Specification:










Specific rotation[a]D20






Sulfate (SO4)






Heavy metals(Pb)



Arsenic (As)



Loss on drying



Residue on ignition



Organic Volatile impurities



Conclusion :

Passed test according to the Standard of USP36

L-Isoleucine CAS:73-32-5 Function

1. Isoleucine can be used as nutritional supplements and seasoning flavouring agent. It can be made as amino acid infusion and comprehensive amino acid preparations, fall blood sugar, plant growth promoter.

2. Isoleucine can help promting muscle recovery after training. It can effectively prevent muscle damage. It can also promt the healing of bone, skin and damaged muscle tissue ;

3. Isoleucine can repair muscle,control blood sugar and provide energy for body tissue together with Isoleucine and valine. It can improve the production of growth hormone and help burning visceral fat because it can resolve into glucose rapidly;

4 .L-Isoleucine is an isomer of Leucine and metabolized in muscle tissue. Rich sources of L-isoleucine include cashews, almonds, and soy protein. And L-Isoleucine is popular among athletes and typically taken or used with the other two BCAAs, L-leucine and L-valine.

Application of L-Isoleucine:

1.L-Isoleucine can be used as amino acid injection, complex amino acid infusion, food additive

2.L-Isoleucine can be used as nutritional supplements. One of the essential amino acids, the minimum requirement per day is about 0.7g. It can strengthen various foods, such as wheat gluten, gluten, peanut powder, potato, etc., containing isoleucine as a limiting amino acid, which should be fortified.

It can be used together with other essential amino acids for amino acid preparations and amino acid infusion.

3. Amino acid drugs. It is a nutritional supplement that is mixed with other carbohydrates, inorganic salts and vitamins for injection. It is used in combination with other amino acids for amino acid infusion and preparation. Adverse reactions and contraindications: When supplementing amino acids, the supplemental isoleucine and other amino acids are required to maintain an appropriate ratio. If the amount of isoleucine is too large, it will produce a nutritional antagonistic effect, causing consumption of other amino acids and a negative nitrogen balance.

4. L-Isoleucine can be used for biochemical research and is used as a nutritional supplement in medicine.

5. L-Isoleucine can be used as Biochemical research. Bacteriology and tissue culture.

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