Product Introduction
DL-Methionine is an essential sulfur-containing racemic amino acid, consisting of equal D and L optical isomers. L-Methionine is biologically active in organisms, while D-form can be converted to L-form via animal metabolism, making DL-Methionine the most cost-effective methionine additive globally.
It is the first limiting amino acid for poultry, swine, aquaculture and ruminants. It participates in protein synthesis, fat metabolism and antioxidant processes, widely applied in feed, food nutrition, pharmaceutical raw materials and cosmetic industries.
Basic Chemical Information
| Item |
Parameter |
| Product Name |
DL-Methionine |
| CAS No. |
59-51-8 |
| Synonyms |
DL-2-Amino-4-(methylthio)butyric acid, Racemic Methionine |
| Molecular Formula |
C5H11NO2S |
| Molecular Weight |
149.21 |
| EINECS No. |
200-432-1 |
| Linear Formula |
CH3SCH2CH2CH(NH2)COOH |
| Appearance |
White crystalline powder / flaky crystal, slight sulfur odor |
| Melting Point |
280°C (decomposition) |
| pH Value (5% Aqueous Solution) |
5.4 ~ 6.1 |
| Solubility |
Soluble in water, dilute acid & alkali; slightly soluble in ethanol; insoluble in ether |
| Density |
1.34 g/cm³ |
Quality Specifications (3 Grades: Feed / Food / Pharma)
1. Feed Grade (Main Export Standard)
| Test Item |
Standard Requirement |
| Assay (Dried Basis) |
99.0% ~ 101.0% |
| Loss on Drying |
≤ 0.50% |
| Residue on Ignition |
≤ 0.10% |
| Heavy Metals (Pb) |
≤ 5 mg/kg |
| Arsenic (As) |
≤ 1 mg/kg |
| Chloride |
≤ 0.02% |
| Sulfate |
≤ 0.02% |
| Other Amino Acids |
Not Detected |
| Transmittance (2.5% Solution, 430nm) |
≥ 98.0% |
2.Food Grade (FCC / JECFA Standard)
Meets FCC VIII & GB 29938-2020, with stricter heavy metal limits, Halal & Kosher certified available.
3.Pharmaceutical Grade (EP / BP Standard)
Purity: 98.5% ~ 101.5%, low impurity, suitable for oral preparations & nutritional injections, GMP production.
4. Core Applications & Functions
1. Feed Industry (Largest Consumption Field)
Boost growth rate & weight gain of broilers, laying hens, piglets, fish and shrimp
Improve feed conversion ratio (FCR), reduce crude protein addition & feed cost
Enhance animal immunity, decrease diarrhea and disease incidence
Optimize egg laying rate & egg quality for poultry; improve meat lean rate
Balance amino acid nutrition in corn-soybean basic feed formulas
2. Food & Nutraceutical Industry
Nutritional fortifier for functional drinks, protein powder, sports supplements
Protect liver, promote hair & nail growth, detoxify heavy metals for human body
Raw material for dietary tablets & capsules
3. Pharmaceutical Industry
Raw material for amino acid infusions, liver-protecting medicines
Cell culture medium reagent for biological lab research
4. Cosmetic Industry
Antioxidant raw material for anti-aging skincare & hair care products
5. Packaging & Logistics
Packaging Options
25kg plastic woven bag with inner PE liner (main bulk export package)
25kg fiber drum with double PE liner (food/pharma grade)
Customized: 500kg / 1000kg jumbo bag, IBC tank drum available
Loading Capacity
20GP full container: 18 ~ 22 MT
40HQ full container: 26 ~ 30 MT
Storage Condition Sealed, cool, dry & ventilated warehouse; avoid moisture, high temperature and direct sunlight; keep away from strong oxidants and toxic goods
Shelf Life: 24 months under proper storage
MOQ: 1000kg; Free samples ≤ 500g for customer testing
6. Our Advantages for Global Buyers
Multi-grade supply: Feed / Food / Pharma grade, fully compliant with FCC, EP, GB standards
Complete certifications: ISO 9001, ISO 22000, SGS, Halal, Kosher, COA, MSDS, Certificate of Origin
Stable monthly output 5000MT, fast lead time within 7-10 working days
Professional export team, support FOB, CIF, CFR, DDP trade terms
Customized inspection & document service for EU, Southeast Asia, Middle East, Latin America markets
Stable batch purity, low moisture, good fluidity for automatic premix production
7. Safety Profile (Brief for Website)
GHS hazard classification: Non-dangerous goods, no dangerous label required
Protective operation: Wear dust mask & gloves when handling powder
First aid: Rinse skin/eyes with plenty of clean water if contacted; drink large amount of water if accidentally ingested
8. Search Keywords (SEO for Independent Website / ******)
DL-Methionine, CAS 59-51-8, Feed Grade DL Methionine 99%, Food Grade DL-Methionine, Pharmaceutical DL-Methionine, Animal Feed Amino Acid Additive, Methionine Feed Supplement, DL 2-Amino-4-(methylthio)butyric acid
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