Amino Acids 45 — Compound Amino Acid Powder, 41.93% Free Amino Acids Verified
The benchmark grade: ≥ 45% total amino acids, ≥ 60% organic matter, and 41.93% free amino acids measured by Eurofins under GB/T 18246-2019. The grade most of our formulator partners standardise on.
- Total Amino Acids≥ 45%
- Total Nitrogen≥ 16%
- Organic Matter≥ 60%
- Moisture≤ 5%
- pH (1% solution)4 – 6
What This Product Is
Amino Acids 45 sits in the middle of the range and carries most of the volume. It is the same hydrolysed duck feather protein as the 35 and 80 grades, concentrated to at least 45% total amino acids and at least 60% organic matter.
What separates it from the entry grade is not only concentration. Eurofins (Chengdu), a CNAS-accredited laboratory, measured free amino acids in this grade at 41.93% under national standard GB/T 18246-2019, certificate AR-26-Y3-008790-02, issued 29 April 2026. Free amino acids are the fraction that is immediately plant-available, so that number is the one a formulator can put behind a label claim.
The measured profile is led by glutamic acid at 6.50%, serine 5.78%, glycine 4.87%, proline 4.53% and aspartic acid 4.19% — a spread that covers chelation, osmotic stress response and general growth support rather than concentrating in one amino acid.
What You Get
- 41.93% free amino acids, independently measured rather than calculated from total nitrogen
- ≥ 60% organic matter, which feeds soil biology alongside the crop
- Balanced spectrum: glutamic acid, serine, glycine, proline and aspartic acid all above 4%
- Fits both foliar and fertigation programmes without changing product
- Dissolves completely, leaving nothing in tanks, drip lines or spray equipment
Who Buys It
- Biostimulant manufacturers building concentrates at 10 to 30% inclusion
- Formulators of premium water-soluble NPK at 5 to 10% inclusion
- Greenhouse and open-field vegetable programmes on weekly fertigation
- Importers who need one grade that covers most of their catalogue
What It Fixes
- Label claims that cannot be supported by a third-party analysis
- Buying on total nitrogen and discovering the free amino acid fraction is low
- Running separate products for foliar and fertigation when one grade covers both
- Organic inputs that raise the risk of emitter blockage under drip
How It Is Made And Supplied
- Source: hydrolysed duck feather protein
- Controlled hydrolysis, purification, concentration and spray drying
- Free amino acids verified by Eurofins (Chengdu), CNAS-accredited, method GB/T 18246-2019
- Certificate AR-26-Y3-008790-02, issued 29 April 2026
- pH 4 to 6 in 1% solution; moisture ≤ 5%; appearance light yellow to brown powder
- Available in 1 kg retail pouches and 20 kg kraft bags with OEM artwork
Technical Data
Typical specifications. Every shipment is verified against the agreed values and supplied with a batch-specific COA; where a value is not published it is left out rather than estimated.
| Total Amino Acids | ≥ 45% |
|---|---|
| Total Nitrogen | ≥ 16% |
| Organic Matter | ≥ 60% |
| Moisture | ≤ 5% |
| pH (1% solution) | 4 – 6 |
| Water Solubility | 100% |
| Appearance | Light yellow to brown powder |
| Source | Hydrolysed duck feather protein |
| Free Amino Acids (Eurofins) | 41.93% |
| Amino Acid | Free Content (Eurofins) |
|---|---|
| Glutamic Acid | 6.50% |
| Serine | 5.78% |
| Glycine | 4.87% |
| Proline | 4.53% |
| Aspartic Acid | 4.19% |
Free amino acid values from Eurofins (Chengdu) certificate AR-26-Y3-008790-02, method GB/T 18246-2019, issued 29 April 2026. Total free amino acids 41.93%.
Typical Use Rates
Rates vary by crop, growth stage and formulation target. Our team provides crop-specific recommendations on request.
- Foliar spray at 100 – 200 g per 100 L of water (0.1 – 0.2%)
- Fertigation and drip at 1.5 – 3 kg per hectare per application
- Water-soluble NPK blends at 5 – 10% of finished blend weight
- Biostimulant formulations at 10 – 30% of finished concentrate
- Soil application or drench at 3 – 5 kg per hectare
- Vegetable programmes at transplant recovery, flowering initiation and fruit development
How It Compares With The Alternatives
| Against Amino Acids 35 | 45 carries more amino acids and nearly double the organic matter; 35 carries more total nitrogen and costs less per hectare. |
|---|---|
| Against Amino Acids 80 | 80 is verified at 75.37% free amino acids against 41.93% here, so it does the same job at roughly half the inclusion — at a higher price per ton. |
| Against a seaweed extract | Seaweed is used for signalling compounds such as alginates, mannitol and betaines; this is an amino acid and organic nitrogen input. They are commonly used together, not interchangeably. |
| Against an unverified 45% powder | A total amino acid figure is not a free amino acid figure. The 41.93% here is a measured free value on a named certificate. |
From Sample To Production Batch
Step 1
Decide whether the programme is foliar, fertigation or formulation, then take the rate from the application table.
Step 2
Pre-dissolve with agitation; do not tip powder into a full tank.
Step 3
For biostimulant concentrates, reconcile the pH 4 to 6 window with the rest of the formulation before scaling up.
Step 4
Run a jar test with the other tank partners at field concentration before the first commercial batch.
Step 5
Use the batch COA figures, not the specification minimums, when a number goes on a label.
Step 6
Store sealed and dry; the powder is hygroscopic and the specification allows up to 5% moisture.
Product, Packaging And Application
Questions About Amino Acids 45
What is the difference between total and free amino acids?
Total amino acids include those still bound in peptides. Free amino acids are already separated and immediately plant-available. This grade is specified at ≥ 45% total and measured by Eurofins at 41.93% free.
Who issued the analysis and when?
Eurofins (Chengdu), a CNAS-accredited laboratory, under GB/T 18246-2019. Certificate AR-26-Y3-008790-02, issued 29 April 2026.
Is this grade suitable for drip irrigation?
Yes. Water solubility is 100%, so it can be dosed through injectors and dosing pumps without leaving sediment in the line.
What inclusion rate suits a biostimulant concentrate?
10 to 30% of finished concentrate for this grade. Above that range the 80 grade is usually the better economic choice.
Can we buy it under our own brand?
Yes. OEM and private-label packaging is supported, with multi-language labels and custom artwork on 1 kg pouches and 20 kg bags.
What is the lead time?
30 days for regular orders, FOB Shanghai or Qingdao.
Other Grades In The Range
Amino Acids 35
The volume grade. A fully water-soluble hydrolysed feather protein powder carrying ≥ 17% total nitrogen, priced for foliar and fertigation programmes
View specification
Amino Acids 80
The density grade: ≥ 80% total amino acids, ≥ 80% organic matter, and 75.37% free amino acids measured by Eurofins. Glycine and proline rich, for conc
View specification
Protein Powder
A collagen-derived protein input at ≥ 90% crude protein and ≥ 80% total amino acids, glycine and proline rich, dissolving at 99% for animal feed, pet
View specificationWhere This Grade Is Used
Greenhouse And Open-Field Vegetables
Crop Programme
Tea And Cash Crops
Crop Programme
Fertigation And Drip Delivery
Application Solution
Biostimulant Concentrates
Application Solution
Amino Acid 45 Explained: Composition, Uses, Buyer Checks
Knowledge
Amino Acid 45: Practical Advantages and Real Limits
Knowledge
Get A Quotation For Amino Acids 45
Send the monthly volume, the destination port and the documents you need. A 200 to 500 g sample with its batch COA can ship in parallel.