• Product Name:L-Threonine
  • Molecular Formula:C4H9NO3
  • Purity:99%
  • Molecular Weight:119.12

Product Details;

CasNo: 72-19-5

Molecular Formula: C4H9NO3

Appearance: White crystalline powder

Chinese Factory Supply Hot Sale L-Threonine 72-19-5 In Bulk Supply

  • Molecular Formula:C4H9NO3
  • Molecular Weight:119.12
  • Appearance/Colour:White crystalline powder 
  • Vapor Pressure:0mmHg at 25°C 
  • Melting Point:256 °C (dec.)(lit.) 
  • Refractive Index:-28 ° (C=6, H2O) 
  • Boiling Point:345.803 °C at 760 mmHg 
  • Flash Point:162.936 °C 
  • PSA:83.55000 
  • Density:1.307 g/cm3 
  • LogP:-0.52060 
  • IDLH:2119 

L-Threonine Amino Acid Powder Threonine CAS 72-19-5

L-Threonine is an essential amino acid that serves as a precursor to other amino acids such as glycine and serine. It plays vital roles in protein synthesis and various physiological functions in the body.


  • Chemical Formula: C?H?NO?
  • Molecular Weight: 119.12 g/mol
  • Appearance: White crystalline powder
  • Solubility: Freely soluble in water
  • Melting Point: Approximately 256-266°C (492-511°F)
  • Specific Rotation: -26.7° to -29.4° (for the L-isomer)
  • Purity: Typically 98% or higher (may vary depending on the product)



  1. Essential Amino Acid: L-Threonine is an essential amino acid, meaning it cannot be synthesized by the body and must be obtained through diet or supplementation.
  2. Protein Synthesis: It is a key component in the synthesis of proteins and plays a vital role in supporting growth, tissue repair, and overall protein metabolism.
  3. Nutritional Supplement: L-Threonine is used as a dietary supplement to meet the nutritional requirements of animals and humans, especially in situations where the dietary intake may be insufficient.
  4. Sweet Taste: L-Threonine has a slightly sweet taste, which makes it suitable for use in food products where a mild sweetness is desired.
  5. Compatibility with Other Ingredients: L-Threonine is compatible with a wide range of other ingredients, allowing for its incorporation into various formulations and applications.



Assay: 99% Min
Loss on drying: 1.0% Max
Residues on ignition: 0.5% Max
Specific rotation: -26.7° ~ -29.6 °
Heavy metals: 10 PPM Max
Arsenic: 2 PPM Max
PH: 5.0-6.5

L-Threonine withe superior quality.feed additive for poultry/feed grade

feedadditive/With the improvement of life of people and the advanced cultivation technology, L-Threonine
is widely used in the feed of piglet, boar, chicken, shrimp and eel. L-Threonine produced by our company
is made from starch or other sugar materials and refined by fermentation, extraction, and crystallisation.
Light brown, nearly white crystal or crystalline powder, slightly sweet, soluble in water.

Animal Feed:

Widely utilized as an essential amino acid supplement in animal feed formulations, particularly for swine and poultry diets. It enhances protein utilization, growth performance, and feed efficiency in animals.
Food and Beverage Industry:

Acts as a nutritional supplement and flavor enhancer in various food and beverage products, including infant formulas, protein bars, sports drinks, and dietary supplements. Enhances taste and nutritional value.


Testing Item Standard Result
Assay/% ≥98.50 99.30
Specific Rotation -26.7° ~ -29.0 °≤1.00 -28.40°
Loss on Drying/% ≤1.00 0.50
Residue on Ignition/% ≤0.30 0.20
Heavy Metal(Pb)/%(mg/kg) ≤20 <20
Arsenic(As)/%(mg/kg) ≤2 <2

Packaging 1kg-15kg packing 2 PE bag inside + 1 foil bag outside in carton
25kg-50kg packing 2 PE bag inside + 1 foil bag outside in drum
Other packing Customized packing
Drum Size D38cm*H60cm or customized, 25 kg/ drum
Shipping 1-50kg International Express Fast and convenient Door to Door
50-500kg Air Transportation Fast and cheap To Air Port
Above 500kg Sea Transportation Cheap and convenient To Port