SINGLE-ENTITY AMINO ACID RANGE
Amino Acid Ingredients
This range covers single-entity amino acids supplied for nutrition, beverage and supplement formulation. Each grade is defined by its declared assay, salt or free-form identity, and impurity profile, with the CAS number stated on the product page.
Scope of this range
| Parameter | Scope of the range |
|---|---|
| Material class | Single-entity amino acids, hydrochlorides and related derivatives |
| Identity basis | Chemical name, CAS number and salt or free-form state |
| Typical assay | 96.0%-101.5% depending on the individual grade and basis (as-is or dried basis) |
| Formats | Crystalline powder, fine powder |
| Documentation | Batch COA, specification sheet, agreed third-party testing, export documents |
Compare available grades
Glycine Powder 98.5%
Glycine (CAS 56-40-6); assay 98.5%-101.5%.
Glycocyamine Powder 98%
Glycocyamine (CAS 352-97-6); assay 98.0%-101.0%.
L-Lysine Monohydrochloride Powder 98%
L-Lysine Monohydrochloride (CAS 657-27-2); assay 98.5%-101.5% on dried basis.
DL-Methionine Powder 99%
DL-Methionine (CAS 59-51-8); assay 99.0%-101.0% on dried basis.
L-Glutamic Acid Powder 98.5%
L-Glutamic Acid (CAS 56-86-0); assay 98.5%-101.5% on dried basis.
L-Threonine Powder 98.5%
L-Threonine (CAS 72-19-5); assay 98.5%-101.5% on dried basis.
L-Cysteine Powder 98.5%
L-Cysteine (CAS 52-90-4); assay 98.5%-101.0% on dried basis.
L-Cysteine Hydrochloride Monohydrate Powder 99%
L-Cysteine Hydrochloride Monohydrate (CAS 7048-04-6); assay 99.0%-101.0% on dried basis.
L-Cysteine Hydrochloride Anhydrous Powder 98.5%
L-Cysteine Hydrochloride Anhydrous (CAS 52-89-1); assay 98.5%-101.0% on dried basis.
Disodium Succinate Powder 98%
Disodium Succinate (CAS 150-90-3); assay 98.0%-101.0% on dried basis.
L-Alanine Powder 98.5%
L-Alanine (CAS 56-41-7); assay 98.5%-101.5% on dried basis.
DL-Alanine Powder 98.5%
DL-Alanine (CAS 302-72-7); assay 98.5%-101.0% on dried basis.
L-Ornithine Monohydrochloride Powder 98%
L-Ornithine Monohydrochloride (CAS 3184-13-2); assay 98.0%-101.0% on dried basis.
L-Methionine Powder 98.5%
L-Methionine (CAS 63-68-3); assay 98.5%-101.5% on dried basis.
L-Arginine Base Powder 98.5%
L-Arginine Base (CAS 74-79-3); assay 98.5%-101.0% on dried basis.
L-Arginine Hydrochloride Powder 98.5%
L-Arginine Hydrochloride (CAS 1119-34-2); assay 98.5%-101.0% on dried basis.
L-Leucine Powder 98.5%
L-Leucine (CAS 61-90-5); assay 98.5%-101.5% on dried basis.
L-Tyrosine Powder 98.5%
L-Tyrosine (CAS 60-18-4); assay 98.5%-101.0% on dried basis.
L-Cystine Powder 98.5%
L-Cystine (CAS 56-89-3); assay 98.5%-101.0% on dried basis.
L-Tryptophan Powder 98.5%
L-Tryptophan (CAS 73-22-3); assay 98.5%-101.5% on dried basis.
L-Isoleucine Powder 98.5%
L-Isoleucine (CAS 73-32-5); assay 98.5%-101.5% on dried basis.
L-Valine Powder 98.5%
L-Valine (CAS 72-18-4); assay 98.5%-101.5% on dried basis.
L-Phenylalanine Powder 98.5%
L-Phenylalanine (CAS 63-91-2); assay 98.5%-101.5% on dried basis.
L-Glutamine Powder 98.5%
L-Glutamine (CAS 56-85-9); assay 98.5%-101.5% on dried basis.
L-Histidine Powder 98.5%
L-Histidine (CAS 71-00-1); assay 98.5%-101.0% on dried basis.
L-Serine Powder 98.5%
L-Serine (CAS 56-45-1); assay 98.5%-101.5% on dried basis.
L-Citrulline Powder 98.5%
L-Citrulline (CAS 372-75-8); assay 98.5%-101.0% on dried basis.
L-Aspartic Acid Powder 98.5%
L-Aspartic Acid (CAS 56-84-8); assay 98.5%-101.5% on dried basis.
L-Proline Powder 98.5%
L-Proline (CAS 147-85-3); assay 98.5%-101.5% on dried basis.
Taurine Powder 98.5%
Taurine (CAS 107-35-7); assay 98.5%-101.5% on dried basis.
L-Asparagine Powder 99%
L-Asparagine (CAS 5794-13-8); assay 99.0%-101.0% on dried basis.
beta-Alanine Powder 98.5%
beta-Alanine (CAS 107-95-9); assay 98.5%-101.0% on dried basis.
L-Hydroxyproline Powder 99%
L-Hydroxyproline (CAS 51-35-4); assay 99.0%-101.0% on dried basis.
L-Aspartate Sodium Powder 98%
L-Aspartate Sodium (CAS 5598-53-8); assay 98.0%-101.0% on dried basis.
L-Lysine Base Powder 98%
L-Lysine Base (CAS 56-87-1); assay 98.0%-101.0% on dried basis.
N-Acetyl-L-Cysteine Powder 99%
N-Acetyl-L-Cysteine (CAS 616-91-1); assay 98.5%-101.0% on dried basis.
N-Acetyl-L-Tyrosine Powder 99%
N-Acetyl-L-Tyrosine (CAS 537-55-3); assay 99.0%-101.0% on dried basis.
S-Carboxymethyl-L-Cysteine Powder 99%
S-Carboxymethyl-L-Cysteine (CAS 638-23-3); assay 98.5%-101.0% on dried basis.
How to choose within this range
| Your requirement | Specification to fix | Why |
|---|---|---|
| Free-form or salt form matters | Declare the exact identity and CAS number | Free base and hydrochloride forms differ in assay and dosage calculation |
| Chiral purity matters | Specify specific rotation or chiral purity | Racemic and L-form grades are different purchasing specifications |
| Moisture-sensitive blending | Fix the drying loss and particle size | Caking and flow behaviour depend on moisture and mesh |
| Comparing two quotations | Compare assay basis, not headline percentage | As-is and dried-basis assays are not directly comparable |
Purchasing and delivery
- Evaluation sample typically 10-20 g, subject to stock
- Regular MOQ typically 1 kg
- 1 kg foil bag or 25 kg fibre drum with inner food-grade liner
- Typical lead time 7-15 working days after deposit, subject to stock and testing
Qualification and COA review
Each amino acid page cites its own representative batch and specification basis. Final acceptance rests on the approved order specification and the current lot COA, and on your finished-product labelling requirements for the declared basis.
Certification coverage for this product line
Botanical and nutritional ingredients in this range are produced at the certified Zhashui site of Shaanxi Longsheng Biotechnology Co., Ltd., which holds five third-party-issued certificates: FSSC 22000 (certificate CN26/00005265, issued by SGS United Kingdom Ltd, valid 13 Jul 2026 – 12 Jul 2029), ISO 22000:2018 (CN26/00005266, issued by SGS United Kingdom Ltd, valid 13 Jul 2026 – 12 Jul 2029), SGS cGMP (CN26/00005948, valid 12 Aug 2026 – 12 Aug 2027), Star-K Kosher Pareve (account NCZSI67Q, valid through 31 Mar 2027) and Halal (3391260000, issued by Shandong Halal Certification Service, valid 28 Jun 2026 – 25 Jun 2029). The original certificate documents are published on the certificate register for Shaanxi Longsheng Biotechnology, which also carries the issuing body, registry identifier and validity date for each certificate.
Related ingredient ranges
Compare these ranges before selecting a purchasing specification:
- Traditional Food-Herb Extracts – 13 grades
- Vitamin and Nutraceutical Ingredients – 28 grades
- Probiotic Strains – 29 grades
- Peptide Ingredients – 71 grades
- Protein Ingredients – 14 grades
- Specialty Standardized Ingredients – 5 grades
Frequently Asked Questions
Is the assay declared as-is or on a dried basis?
Both bases are used in the industry. The basis is stated on each product page and on the offered COA; always compare quotations on the same basis.
Do you supply both free-form and salt forms?
Where both forms exist in the range, they are published as separate products, because their assay, dosage and labelling differ.
Are racemic and single-isomer grades interchangeable?
No. They are different purchasing specifications and should be qualified separately.
Which quality parameters matter beyond assay?
Heavy metals, microbiological limits, drying loss, ash and specific rotation where relevant. These can affect acceptance independently of assay.
Are you a manufacturer or a trading company?
We are Shaanxi Longsheng Biotechnology Co., Ltd., a direct manufacturer integrating R&D, production and export support. Factory review may be arranged by video or an on-site visit.
Can I request the current batch COA before ordering?
Yes. Request the applicable current or representative COA for each shortlisted grade and compare identity, method, limits and results.
What is the minimum order quantity?
The regular MOQ is typically 1 kg. Evaluation samples of 10-20 g may be arranged subject to stock.
Can specifications or packaging be customised?
Selected assay targets, particle size, carrier and packing may be reviewed case by case before quotation.
Request a Grade Comparison
Send your application, target specification, annual volume, destination and document requirements.