Description
COA-BACKED FEED ADDITIVE
Feed-grade liquid methionine source, supplied as the hydroxy analogue of methionine (DL-HMTBa, also traded as MHA). Dark brown viscous liquid, minimum 88.0% active substance, produced to reference standard GB 7300.103-2020.
This is not DL-methionine. DL-HMTBa is the hydroxy analogue of methionine; the assay below is stated on the HMTBa basis and does not convert directly into a DL-methionine equivalent. Inclusion rate and methionine equivalence must be set by your nutritionist against your local feed regulation.
Product Identity
| Product name | Liquid Methionine Analogue (DL-HMTBa) 88% |
|---|---|
| Chemical name | 2-Hydroxy-4-(methylthio)butanoic acid (DL-HMTBa, also traded as MHA) |
| CAS number | 583-91-5 |
| Molecular formula | C5H10O3S |
| Product form | Free acid, dark brown viscous liquid |
| Reference standard | GB 7300.103-2020 |
| Shelf life | 24 months in the original sealed packaging |
COA-Backed Specification
| Item | Specification | Method | Test result |
|---|---|---|---|
| Appearance | Dark brown viscous liquid | GB 7300.103-2020 | Conform |
| Odour | Free from off-odour | GB 7300.103-2020 | Conform |
| Active substance (DL-HMTBa) | ≥88.0% | GB 7300.103-2020 | 88.5% |
| Moisture | ≤12.0% | GB 7300.103-2020 | 11.5% |
| pH (10% aqueous solution) | ≤1.0 | GB 7300.103-2020 | 0.7 |
| Lead (Pb) | ≤5 mg/kg | GB/T 13080-2018 | 0.4 mg/kg |
| Arsenic (As) | ≤2 mg/kg | GB/T 13079-2022 | 0.2 mg/kg |
| Ammonium salts | ≤1.5% | GB 7300.103-2020 | 0.7% |
| Cyanide | Not detectable | GB 7300.103-2020 | Not detected |
| Total plate count | ≤1000 CFU/g | GB/T 13093-2023 | 30 CFU/g |
| Yeast & mould | ≤100 CFU/g | GB/T 13092-2025 | <10 CFU/g |
| E. coli | Negative | GB/T 18869-2019 | Negative |
| Salmonella | Negative | GB/T 13091-2018 | Negative |
Representative batch LXHMT260715 · Manufactured Jul. 15, 2026 · Expiry Jul. 14, 2028.
Representative values do not replace the COA of the batch actually shipped.
Buyer Decision Guide
Read the assay on the right basis. The figure that matters here is active substance as DL-HMTBa (88.0% minimum). It is not interchangeable with a DL-methionine percentage. If a specification states a methionine equivalent, ask which basis and which conversion was used.
Check moisture and ammonium salts together. Moisture is capped at 12.0% and ammonium salts at 1.5%; both affect how much active substance you actually receive per tonne.
Note the pH. At 1.0 or below in 10% aqueous solution this is a strongly acidic liquid. Confirm your dosing line, storage tank and handling materials are suitable before ordering in bulk.
Ask for the batch you will receive. Every shipment carries its own COA with batch number, manufacture date and expiry date. The table above is a representative batch, not a guarantee for the shipment.
How This Grade Differs
Against DL-Methionine Powder 99% — a different molecule, not a different concentration of the same one. DL-HMTBa is the hydroxy analogue; the powder is DL-methionine. The liquid has no dust and is handled by pumping, which suits automated premix lines; the powder suits dry blending.
Against the calcium salt of HMTBa — this product is the free acid form, which is why it is a low-pH liquid.
Against other amino acids — this is a feed-chain methionine source, not a food or supplement grade amino acid. If your application is not compound feed, premix, feed concentrate or a feed-mill dosing line, compare L-Lysine Monohydrochloride Powder 98% or L-Threonine Powder 98.5% instead.
Application Areas
- Compound feed and premix production
- Feed concentrate manufacturing
- Liquid dosing lines in feed mills
Suitability for a given species and inclusion rate depend on your local feed additive authorisation and your nutritionist’s formulation.
Packaging and Delivery
Packaging
- Drum — the standard export pack for this product
- 25 kg pack — available for trial orders and small-volume lines
Minimum order
From 25 kg.
Delivery
Quotation is issued against your destination country and volume; FOB, CIF and DDP terms are all available on request.
Quality and Documentation
- Batch COA with batch number, manufacture date, expiry date, test methods and results
- Reference standard: GB 7300.103-2020
- Heavy metals: lead and arsenic tested per GB/T 13080-2018 and GB/T 13079-2022
- Microbiology: total plate count, yeast and mould, E. coli and Salmonella per the GB/T methods listed in the specification table
- Shelf life: 24 months in the original sealed packaging, stored in a cool dry place away from direct sunlight
Frequently Asked Questions
Is this the same as DL-methionine?
No. This is DL-HMTBa, the hydroxy analogue of methionine (also traded as MHA). It is a different molecule from DL-methionine. The 88% figure is active substance on the HMTBa basis, not a DL-methionine content.
What is the CAS number?
583-91-5. Molecular formula C5H10O3S.
What is the active content?
Specification 88.0% minimum; the representative batch LXHMT260715 tested at 88.5%.
Is it feed grade?
Yes. It is produced to GB 7300.103-2020, the Chinese national standard for this feed additive.
What does it look like and how does it handle?
A dark brown viscous liquid with no off-odour, pH 1.0 or below as a 10% aqueous solution. Because it is strongly acidic, confirm your tank, pump and dosing-line materials before bulk ordering.
What is the shelf life?
24 months when stored properly in the original sealed packaging, in a cool dry place away from direct sunlight.
How is it packed?
In drums as the standard export pack, or in 25 kg packs for trial orders and small-volume lines. Minimum order is 25 kg.
Can I start with a small quantity?
Yes. A 25 kg pack is available, so you can run a trial on your own dosing line before committing to drums. That matters here because the product is strongly acidic and line compatibility is worth testing first.
Request COA, Sample or Quotation
Send your destination country, required volume and packing preference. We reply with the current batch COA, packing options, lead time and a quotation.
Ordering from 25 kg. Tell us the destination country, the volume and whether you need drums or the 25 kg pack, and we will come back with the current batch COA, lead time and price.
Get the current batch COA, a sample or a quotation
