A Brief Introduction to L-Threonine
Molecular Formula:C4H9NO3
Molecular Weight:119.12
CAS No.: 72-19-5
Appearance:White crystalline powder
Regular commercial package: 25kg/drum
What is L-Threonine?
L-Threonine is an essential amino acid that the human body cannot synthesize on its own. It must be obtained through food (meat, dairy products, eggs, legumes, and some fruits and vegetables) or supplements. Vegetarians, those with malnutrition, and picky eaters may need supplements to obtain sufficient L-Threonine for proper functioning. L-Threonine promotes protein synthesis in the body, enhances biological activity, and maintains health and balance.

Applications of L-Threonine
Highassay adheres to strict quality control (QC) to produce L-Threonine. Buy L-Threonine in bulk from us now to get competitive market prices.
- Nutritional Supplement
For special populations, such as the elderly, pregnant women, children, and athletes, who require higher levels of L-Threonine, supplements can be used to boost energy and immunity, accelerating recovery.
- Animal Feed
L-Threonine is added to animal feed to accelerate growth, improve the texture of meat, and enhance animal performance and immunity.
- Food Additive
It is added to pastries, dairy products, and other products as a nutritional supplement to promote growth and development.
- Pharmaceutical
It has preventive and therapeutic effects on cardiovascular disease; it can also improve liver function and help the liver eliminate toxins.
- Cosmetics
L-Threonine is added to cosmetics to impart multiple benefits, including moisturizing, whitening, anti-inflammatory, and antioxidant properties.
Benefits of L-Threonine
- By participating in protein synthesis, L-Threonine promotes growth and development in infants and young children, strengthens the bones of the elderly, and rapidly restores physical fitness and conditioning in athletes.
- L-Threonine promotes rapid growth in animals, shortens the growth cycle of poultry for human consumption, and enhances animal immunity.
- L-Threonine participates in sugar and lipid metabolism, providing sufficient energy for the human body, alleviating fatigue and promoting more active bodily functions.
- L-Threonine exists in liquid form throughout the body, promoting cell growth and reproduction, contributing to a more youthful appearance and delaying aging.
If you have any questions about processing L-Threonine, Highassay’s R&D team is here to help.


About L-Threonine
As a Chinese L-Threonine supplier, Highassay offers superior product quality and competitive pricing. We welcome inquiries and purchases.
L-Threonine VS L-Theanine
L-Theanine is an amino acid primarily found in green tea. Its primary function is to relax the brain and improve focus. A moderate intake of L-Theanine can improve sleep quality and relieve anxiety. Its functions and sources differ from those of L-Threonine. Please choose the appropriate supplement based on your specific needs.

Specification of L-Threonine
L-Theronine | CP2020 | EP11 | USP2023 | AJI92 |
Assay | ≥98.5% | 99.0-101.0% | 98.5-101.5% | 99.0-100.5% |
PH | 5.0-6.5 | 5.0-6.5 | 5.0-6.5 | 5.2-6.2 |
Specific rotation[a]D20 | -26.0°–29.0° | -27.6°–29.0° | / | -27.6°–29.0° |
Specific rotation[a]D25 | / | / | -26.7°–29.1° | / |
Transmittance(T430) | ≥98.0% | / | / | ≥98.0% |
Appearance of solution | / | clear & colorless | / | / |
Chloride(Cl) | ≤0.02% | ≤0.02% | ≤0.05% | ≤0.02% |
Ammonium(NH4) | ≤0.02% | ≤0.02% | / | ≤0.02% |
Sulfate(SO4) | ≤0.02% | ≤0.03% | ≤0.03% | ≤0.02% |
Iron(Fe) | ≤10PPM | ≤10PPM | ≤30PPM | ≤10PPM |
Heavy metals(Pb) | ≤10PPM | / | / | ≤10PPM |
Arsenic | ≤1PPM | / | / | ≤1PPM |
Other amino acids | ≤0.50% | / | Individual impurities≤0.5% Total impurities≤2.0% | Chromatographically not detectable |
Ninhydrin-positive substances | / | Individual impurities≤0.20% Total impurities≤0.5% | / | / |
Loss on drying | ≤0.20% | ≤0.50% | ≤0.20% | ≤0.20% |
Residue on ignition | ≤0.10% | ≤0.10% | ≤0.4% | ≤0.10% |
Endotoxin | <12EU/g | <12EU/g | <12EU/g | / |
Total plate count | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
Moulds & Yeasts | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |