ZHICHENG BIO
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01Product
D-Aspartic Acid
At a glance
D-Aspartic Acid from Zhicheng Bio — supply summary
Zhicheng Bio supplies bulk D-Aspartic Acid, CAS 1783-96-6, shipping from Shanghai, China. This grade is produced to order. Every shipment carries a batch Certificate of Analysis; specification sheet and MSDS are supplied on request. Zhicheng Bio publishes no list price — quotes are issued per quantity and Incoterm by email to zhicheng1@zhicheng-bio.cn.
- Supplier
- Zhicheng Bio, Shanghai, China
- CAS number
- 1783-96-6
- Molecular formula
- C4H7NO4
- Availability
- Made to order
- Documents
- Batch CoA with every shipment; spec sheet and MSDS on request
- Packing
- 25 kg cartons or bags, adjustable
- PubChem CID
- 83887
- How to get a price
- Email RFQ to zhicheng1@zhicheng-bio.cn — no list price is published
Sports Nutrition
In stock
D-Aspartic Acid
CAS 1783-96-6 · C4H7NO4
Bulk D-Aspartic Acid for B2B manufacturing — supplied against your target specification, with documentation your QA can review before anything ships. Pricing below is indicative; send an RFQ for a firm quote, MOQ and lead time.
$6.65 – $7.44 /kg
by order volume · indicative, ex-Shanghai
Indicative range — larger volumes price toward the low end. Ingredient markets move weekly; your firm price is confirmed by quotation, typically within one business day.
Key supply points
- Supplied against your target specification — USP / FCC / JP monograph where applicable
- Recent batch COA provided with the quotation, before you commit
- Consolidates with other SKUs into one shipment out of Shanghai
- Third-party lab verification available pre-shipment on request
Documentation with every batch
COA per batchSpec SheetMSDS / SDSExport docs
Third-party lab verification can be arranged pre-shipment on request. Certificates of origin, non-GMO or allergen statements per destination-market requirements.
Shipping & Lead Time
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Documentation-first
COA per batch, Spec Sheet and MSDS — reviewed by your QA before anything ships.
Ready-stock depth
Multi-tonne inventory on core SKUs, plus 28 actives held in our US warehouse in Los Angeles for domestic delivery.
Certified supply chain
Sourced from audited, certified manufacturers — ISO, HACCP, Halal & Kosher available.
Flexible export
25 kg bags, cartons or drums; FOB / CIF / DDP by lane, sea or air consolidation.
02Identity & properties
Identity & properties
Compound identifiers and physical properties for this material. The binding version is always the Specification Sheet and batch COA issued with your quotation.
| CAS No. | 1783-96-6 |
|---|---|
| Molecular Formula | C4H7NO4 |
| Molecular Weight | 133.10 |
| EINECS | 217-234-6 |
| Synonyms | D-Aspartic acid, DAA, D-Asp, (2R)-2-aminobutanedioic acid, D-aminosuccinic acid |
| Appearance | White crystalline powder |
| Solubility | Sparingly soluble in water |
03Specifications
Specifications
Typical parameters below — the binding version is the Specification Sheet and batch COA we send with your quotation.
| Parameter | Specification | Test method |
|---|---|---|
| Enantiomeric purity (D-form) | — | Chiral HPLC or optical rotation |
| Specific optical rotation | — | Polarimetry |
| Assay (as-is / dried basis) | — | Titration or HPLC per the applicable monograph |
| Appearance | — | Visual |
| Identification | — | IR / specific optical rotation per monograph |
| Specific optical rotation | — | Polarimetry |
| Loss on drying | — | Gravimetric |
| Residue on ignition / sulphated ash | — | Gravimetric |
| Chloride | — | Per monograph |
| Sulphate | — | Per monograph |
| Iron | — | Per monograph |
| Other amino acids / related substances | — | TLC or HPLC per monograph |
| Heavy metals (Pb / As / Cd / Hg) | — | ICP-MS or per monograph |
| Microbiology (TAMC / TYMC / E. coli / Salmonella) | — | USP <61>/<62> or equivalent |
A dash means we have no fixed limit to publish for that parameter: it is reported on the batch COA and the limit is agreed with your QA. We would rather leave it blank than invent a number. Full physical, chemical, heavy-metal and microbiological parameters are listed in the Specification Sheet — sent with every quotation.
04Formulation & handling notes
Formulation & handling notes
The practical points our technical team raises with buyers of this material — the things that decide whether a batch behaves in your process.
01
The entire commercial risk on this product is chirality. L-aspartic acid is a bulk commodity sold at a fraction of the price of the D form, the two are chemically identical to any non-chiral assay, and they share the same molecular formula and molecular weight. A COA showing 'assay 99% aspartic acid' is not evidence you received D-aspartic acid. Insist on a chiral method with a stated L-isomer limit.
02
Optical rotation is the cheap sanity check: the two enantiomers rotate light in opposite directions. If the COA carries a rotation with the correct sign and magnitude, that is at least a first-pass confirmation before a full chiral chromatographic method.
03
Aspartic acid is a dicarboxylic amino acid — two carboxyl groups and one amine — so it is distinctly acidic in solution and will pull an unbuffered blend's pH downward. It behaves in a formula more like a food acid than like a neutral amino acid.
04
Free aspartic acid is only sparingly water-soluble, which is why it usually appears in capsules or unflavoured scoops rather than in clear beverages, and why the sodium salt exists for liquid applications.
05
The published human evidence on D-aspartic acid supplementation is genuinely mixed and includes null and negative results in resistance-trained men at both 3 g and 6 g per day. Marketing copy on a finished product should be written by someone who has read those papers — see the literature section.
05Applications
Applications
B2B manufacturing use only — no finished-product or health claims.
Sports-nutrition and hormone-support supplement formulations
Capsules and unflavoured powders
Research and analytical reference use
Peptide synthesis and biochemical research
06Regulatory status by market
Regulatory status by market
Status of the raw material, stated as conservatively as our sources allow. This is supply-chain information, not regulatory advice — confirm the position for your finished product and destination market with your own regulatory counsel.
| Market | Status | Basis |
|---|---|---|
| United States | FDA's amino-acid food-additive regulation lists 'L-Aspartic acid' — the L enantiomer only. D-aspartic acid is NOT a listed form, and the regulation is explicit that it covers the named amino acids in the free, hydrated or anhydrous form or as hydrochloride, sodium or potassium salts. No GRAS notice for D-aspartic acid was identified. US supplement marketing rests on DSHEA and possibly on a New Dietary Ingredient notification. | 21 CFR 172.320(a)(4) (L-Aspartic acid); DSHEA / NDI framework |
| European Union | D-aspartic acid is likely to require novel-food assessment for food or supplement use in the EU; no authorisation was identified. | Regulation (EU) 2015/2283 (novel foods) |
| China | Status as a nutrient fortification substance / food additive under Chinese national standards to be confirmed. | GB 14880-2012 (nutrient fortification substances), GB 2760 (food additives), and NHC new-food-ingredient announcements |
| Japan | No JP XVIII Official Monograph for this substance was located. | JP XVIII |
07Selected research
Selected research
Peer-reviewed literature on this compound, with linked identifiers so you can read the primary source rather than take our word for it.
These references are listed for scientific context only. They describe published research on the compound; they are not claims about this raw material and not claims about any finished product. Zhicheng Bio makes no medical, health or performance claims.
- In resistance-trained men taking 3 g/day for 28 days alongside heavy resistance training, D-aspartic acid supplementation had no effect on body composition, muscle strength, or serum total and free testosterone, luteinising hormone, gonadotropin-releasing hormone or oestradiol. Willoughby DS, Leutholtz B. Nutr Res. 2013;33(10):803-810. PMID 24074738DOI 10.1016/j.nutres.2013.07.010Source
- In a randomised double-blind placebo-controlled trial, 22 resistance-trained men took 6 g/day of D-aspartic acid or placebo through twelve weeks of supervised periodised resistance training, with basal total and free testosterone, oestradiol, sex-hormone-binding globulin, isometric strength and muscle cross-sectional area as outcomes. Melville GW, Siegler JC, Marshall PWM. PLoS One. 2017;12(8):e0182630. PMID 28841667DOI 10.1371/journal.pone.0182630Source
- In 24 resistance-trained men randomised to placebo, 3 g/day or 6 g/day of D-aspartic acid for 14 days, the study explored responsiveness by initial testosterone level after previous work had reported increases in sedentary men but no significant hormonal change in resistance-trained men. Melville GW, Siegler JC, Marshall PW. J Int Soc Sports Nutr. 2015;12:15. PMID 25844073DOI 10.1186/s12970-015-0078-7Source
- In male climbers, short-term D-aspartic acid supplementation did not affect serum biomarkers associated with the hypothalamic-pituitary-gonadal axis. Crewther B, Witek K, Draga P, et al. Int J Sport Nutr Exerc Metab. 2019;29(3):259-264. PMID 29893592DOI 10.1123/ijsnem.2018-0076Source
08Packing, storage & lead time
Packing, storage & lead time
| Standard packing | 25 kg bags, cartons or drums |
|---|---|
| Private packing | Custom packing & labeling available for regular customers |
| Storage | Cool, dry place, sealed in original packaging |
| Lead time | In stock |
| Shipping | Sea or air consolidation out of Shanghai · FOB / CIF / DDP by lane |
09Procurement FAQ
Procurement FAQ
01How do I know I'm getting D-aspartic acid and not the cheap L form?
Only from a chiral method. L-aspartic acid is a commodity at a fraction of the price, and it is indistinguishable from the D form by molecular formula, molecular weight or a standard total assay. Ask us for the manufacturer's chiral HPLC method and its L-isomer limit, plus the specific optical rotation with its sign. We will get both onto the specification sheet before you order.
02Will it acidify my formula?
Yes. Aspartic acid has two carboxyl groups and behaves more like a food acid than a neutral amino acid. In an unbuffered blend expect the pH to drop, and re-titrate accordingly.
03Can I use it in a clear beverage?
Free aspartic acid is only sparingly water-soluble, which is why this ingredient is usually capsuled or scooped rather than dissolved. If you need a liquid format, the sodium salt is the route people take — tell us and we will look at sourcing it.
04What does the human evidence actually show?
It is mixed, and we would rather you know that from us than from a regulator. Randomised trials in resistance-trained men at 3 g/day and 6 g/day have reported no changes in testosterone or body composition versus placebo. We supply the raw material and the references; the claims on your finished product are yours to substantiate.
05What is the MOQ for D-Aspartic Acid?
MOQ is quote-based and flexible. Tell us your target quantity in the RFQ — for core in-stock SKUs we can usually accommodate both trial orders and multi-tonne volumes.
06Can I get a sample of D-Aspartic Acid before ordering?
Yes — samples are available on request for evaluation and lab verification. Mention it in your RFQ and we will confirm the arrangement.
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