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l threonine characteristics
Feed Grade L-Threonine · CAS 72-19-5


Precisely Supplement Limiting Amino Acids
Optimize Feed Formula Balance

Empowering Feed Producers with Cost
Effective Essential Amino Acid Solutions


Purity ≥98.5% | Custom OEM Packaging | COA Supplied with Shipment

Get the Latest Market Quotes

Low Effective Utilization Rate of Feed Formulas

Although feed formulas contain relatively high protein levels, animals may still suffer from nutritional deficiencies after consumption. This is likely caused by the following issues:

High Crude Protein Level

A high proportion of protein ingredients in feed raw materials does not mean the amino acid profile is complete and can precisely meet the nutritional requirements for animal growth.

Imbalanced Amino Acid Ratios

Among the abundant amino acids from feed ingredients, some are supplied in excess, while the limiting amino acids required for animal growth remain insufficient.

Excessively High Feed Formula Cost

Amino acids are costly. Adding multiple amino acids pushes up formula expenses. However, supplementing only one single amino acid also requires additional supplementation of other amino acids to maintain amino acid balance; otherwise, adding just one amino acid will fail to deliver optimal performance.

Poor Feed Utilization Efficiency

When the amino acid profile in feed cannot fully match animals’ nutritional requirements, feed utilization drops, and production performance fails to meet expectations.

Polifar L-Threonine Helps Balance Amino Acids for Animals

Polifar L-Threonine Helps Balance Amino Acids for Animals

Supports Protein Synthesis

Threonine is one of the essential amino acids for animal protein synthesis, laying the nutritional foundation for tissue growth and protein metabolism in animals.

Balances Amino Acid Ratios

L-Threonine works synergistically with lysine, methionine, tryptophan and other amino acids in feed formulation. It helps maintain amino acid balance in animals to achieve optimal production targets.

Reduces Feed Formulation Costs

Feed formulas containing multiple protein sources do not guarantee full absorption of protein nutrients by animals. Rational proportioning of feed ingredients, amino acids, vitamins and trace minerals optimizes the formula, cuts unnecessary nutrient waste and delivers better cost efficiency.

Improves Feed Utilization Efficiency

A balanced amino acid profile supports optimal gut health, growth and reproductive performance in animals. When feed manufacturers add palatability enhancers such as citric acid to improve feed taste, animals will eat more actively, daily gain rises, and nitrogen excretion decreases. Overall feed utilization is enhanced.

The value of L-threonine goes far beyond simply “adding another amino acid”. It enables more precise threonine supplementation in feed formulas and improves overall amino acid balance.

Polifar L-Threonine Product Features

L-threonine, CAS 72-19-5, cannot be synthesized by animals and must be obtained from feed. It is the second limiting amino acid for swine and the third limiting amino acid for poultry.
As a distributor of L-threonine, Polifar supplies l-threonine of high purity, good flowability and excellent solubility to farmers worldwide. Feed-grade l-threonine is widely applied in feeds for piglets, breeding swine, broilers, laying hens, shrimp, eels and other species, helping global farmers achieve efficient production.

Polifar L-Threonine Product Features

High Purity

Assay ≥98.5%, low impurities, stable batch test results and excellent formulation compatibility.

Good Flowability

Uniform powder particles, anti-caking property, enabling more homogeneous mixing during feed processing.

High Solubility

Solubility in water is approximately 20.5 g/100ml at 25℃ for higher animal absorption and utilization.

Safe & Stable

Odorless with a slight sweet taste, chemically stable, suitable for various feed formulas for swine, poultry and aquaculture species.

Polifar L-Threonine

Polifar L-Threonine COA

Polifar conducts batch-by-batch physicochemical testing for every shipment of l-threonine. Retained samples are kept for full traceability. COA test certificates are provided with each delivery, supporting your formulation work and compliance audits with reliable documentation.

Test Item Specification
Product Name L-Threonine (Feed Grade)
CAS No. 72-19-5
Molecular Formula C₄H₉NO₃
Molecular Weight 119.12
Assay ≥ 98.5%
Appearance White crystalline powder, odorless, slightly sweet
Melting Point Approx. 253℃ (decomposes while melting)
Solubility Soluble in water (20.5g/100ml at 25℃), insoluble in ethanol, ether and chloroform
Isoelectric Point 5.6
Packaging 25kg/bag (Kraft paper composite bag + PE inner bag), OEM packaging available
Shelf Life 24 months
Storage Condition Seal and store in cool, dry and ventilated place, protect from moisture and direct sunlight

Threonine Is Suitable for Various Animal Feed Systems

From swine and poultry to aquaculture and ruminants, Polifar l-threonine meets nutritional requirements across all growth stages of animals, enabling precise formulation according to each growth phase.

L-Threonine for Swine

Swine

Repair intestinal mucosa, prevent post-weaning diarrhea, reduce low-protein diet cost and optimize lean meat rate.

Applicable stages: Suckling & Weanling Piglets, Growing Pigs, Finishing Pigs, Gestating & Lactating Sows. Precise formulation according to growth stages.
L-Threonine for Poultry

Poultry

Promote full feather development, raise antibody titer (immunity), increase breast muscle deposition and egg production.

Applicable stages: Broilers and layers in all growth phases, as well as meat ducks, geese and other poultry feeds, effectively improving product shelf quality.
L-Threonine for Aquaculture

Aquaculture

Improve digestive enzyme activity, help replace fish meal with plant protein, enhance anti-stress capacity and molting growth.

Applicable stages: Shrimp, crab and other aquatic species (short intestinal tract, essential amino acid). Adding to aquafeed can reduce farming mortality.
L-Threonine for Ruminants

Ruminant

Significantly increase milk protein rate and milk yield, reduce blood ammonia and improve protein metabolism efficiency.

Applicable stages: High-yielding Dairy Cows in peak lactation and transition period, Beef Cattle & Sheep in the late fattening rapid weight gain phase.

L-Threonine | Synergistic Combination · Comprehensive Nutrition

L-Threonine acts synergistically with L-Lysine, Methionine, Tryptophan, BCAAs, L-Glutamine/L-Arginine and L-Glycine/L-Serine. Suitable for various poultry feeds, it supports all-round healthy animal growth, reduces disease risk, increases feed intake, optimizes feather development and lifts average daily gain.

To enhance your reading experience, Polifar has prepared a comparison table for easy reference.

Synergistic Amino Acid Core Synergy Strategy Optimal Application Scenario / Physiological Performance Key Synergy Mechanism
L-Lysine Protein deposition + Muscle growth Growing-finishing pigs, broilers, aquatic species and all other animals Maintain optimal Thr/Lys ratio (60–68% for swine, 65–72% for poultry) to eliminate lysine antagonism
DL-Methionine Intestinal barrier + Immune response Weaned piglets, coccidiosis control in broilers, laying hens during egg production cycle Form dual intestinal barrier: cellular antioxidant (Met) + mucus physical protection (Thr)
L-Tryptophan Feed intake regulation + Appetite center Piglet weaning period, environmental / transfer stress stage Regulate 5-serotonin synthesis, jointly improve average daily feed intake (ADFI)
Branched Chain Amino Acids (BCAA) Low crude protein diet (Environmental protection / Cost reduction) Low-nitrogen emission formula with 2–4% reduced crude protein Activate mTOR pathway with Leucine, avoid carrier absorption competition
L-Glutamine / L-Arginine Intestinal villus development and repair Starter feeds, damaged intestinal recovery, aquatic fry Three-in-one intestinal repair: "Energy supply (Gln) + Blood flow (Arg) + Mucus scaffold (Thr)"
L-Glycine / L-Serine Endogenous metabolism & Feather growth Poultry low-protein diet, young bird feather development Threonine acts as precursor for glycine, assists uric acid excretion and feather synthesis in poultry
Balanced animal nutrition depends on synergies among multiple nutrients. Single-amino-acid supplementation cannot deliver fast animal growth. The balanced interaction of lysine, methionine, threonine, tryptophan, valine, leucine, isoleucine, arginine, glycine and serine supports sound, rapid animal growth.

Key Questions from Customers on L-Threonine Applications

Polifar will address your real concerns, covering flowability during storage and transportation as well as batch consistency.

01

Powder Flowability in Storage & Transportation

During sea freight and long-distance warehousing, powder tends to absorb moisture and agglomerate, raising labor costs and affecting automatic feeding.

Actual Situation

Powder amino acids have strict requirements for storage humidity, sealing and stacking conditions.

Polifar Guarantee

  • High-barrier moisture-proof composite packaging
  • Optimized crystallization process to improve moisture absorption resistance
  • Container moisture-proof liner + pallet reinforcement to guarantee free-flowing powder
02

Mixing Uniformity & Processing Adaptability

When L-Threonine is added in micro-doses, mismatched physical properties or unreasonable mixing time will cause feed concentration deviation and affect feeding accuracy.

Actual Situation

The mixing uniformity of micro-dose powder amino acids is directly related to the accuracy of feed nutrition standards.

Polifar Guarantee

  • Optimized particle size to match mainstream feed carrier properties
  • Anti-static and low-wall adhesion to achieve high mixing uniformity with CV ≤ 5%
  • Provide feeding sequence and process parameter guidance according to equipment conditions
03

Batch Consistency & Standardization

Fluctuations in physical and chemical indicators of raw material batches force frequent parameter adjustment of automatic production lines, bringing compliance risks.

Actual Situation

Automated large-scale production relies heavily on raw material batch consistency to ensure stable production and products.

Polifar Guarantee

  • Fully automatic fermentation refining, stable purity ≥98.5%, moisture ≤1.0%
  • Batch-by-batch physical and chemical testing with COA provided and retained samples for full traceability
  • In-house sampling inspection for bulk density and particle size to adapt to automated feeding

Why Choose Polifar L-Threonine?

Polifar delivers end-to-end trust covering procurement decisions and long-term fulfillment

Stable Fulfillment

Support long-term order planning to guarantee supply chain resilience and continuous delivery.

Complete Qualifications

Fully provide COA, TDS, SDS and other full sets of technical and compliance documents with traceable quality.

Custom Packaging

Provide multi-specification, high-quality custom packaging solutions based on transportation and factory feeding requirements.

Consultative Service

Dedicated account manager for one-on-one follow-up, covering specification consultation, application guidance and logistics fulfillment.

Global Experience

Mature foreign trade export system, precisely serving global customers in food, feed and nutrition industries.

Market Alert

Regularly share global raw material price trends and analysis, helping customers seize the best purchasing timing.

Seize purchasing opportunities with market alerts, and guarantee every delivery via a robust supply chain.
FAQs
  • Q1: What is the difference between L-Threonine and DL-Threonine?
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    A1: They differ in configuration and bioavailability. L-Threonine is the naturally occurring optically active form. It can be directly absorbed and utilized by animals at 100%, making it the only effective form for feed and food addition. DL-Threonine is a racemic mixture with very low animal bioavailability. It is generally used only for chemical synthesis or specific research applications.
  • Q2: Can you provide samples?
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    A2: Yes. We offer free small samples (100g~500g sample packs) for your testing and evaluation, supporting COA verification or trial mixing. Simply contact our sales team and provide your shipping address and courier account, and we will arrange delivery.
  • Q3: What are the symptoms of threonine deficiency in poultry?
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    A3: The main signs of threonine deficiency in poultry include stunted growth and a marked drop in average daily gain; poor feather development (sparse, dull feathers or feather pecking); weakened immunity (impaired antibody synthesis and higher susceptibility to infections); poorer feed conversion ratio and reduced breast muscle deposition.

Brochure of L-Threonine Products

Name Size Downloads Update Thumbnail Download
L-Threonine Feed Grade.pdf 301KB 693 2026-09-24 download Download

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