DL-Methionine CAS 59-51-8 Cost-Effective Essential Amino Acid for Global Feed, Food & Supplement Importers

1. Complete Technical Specification of DL-Methionine CAS 59-51-8

1.1 Basic Product Information

Chinese Name: DL-蛋氨酸
Industry Synonyms: DL-Methionine, racemic methionine, 2-amino-4-methylthiobutyric acid
Standard English Name: DL-Methionine
Global Trade Aliases: Metione, Pedameth, Urimeth, α-amino-γ-methylmercaptobutyric acid
CAS No.: 59-51-8
EINECS No.: 200-432-1
Molecular Formula: C₅H₁₁NO₂S
Molecular Weight: 149.21

1.2 Physicochemical Properties

DL-Methionine CAS 59-51-8 appears as pure white flaky crystals or crystalline powder with a slight characteristic odor and mild sweet taste. It is a mandatory limiting amino acid widely demanded by global feed manufacturers, health food brands and dietary supplement factories.
Standard lab-tested physical & chemical indexes:

1. Decomposition melting point: 281℃; stable pH range of 5.6~6.1 for 10% aqueous solution, optically inactive;
2. Environmental stability: Heat and oxidation resistant under normal temperature & air storage. Demethylation reaction only occurs when exposed to strong acid, so avoid strong acid during storage & ocean shipment;
3. Solubility: 3.3g/100ml solubility in water at 25℃, fully soluble in dilute acid & dilute alkali; barely soluble in ethanol, almost insoluble in ether.

Outstanding physical stability solves two major pain points of overseas importers: No caking during 30-60 days high temperature & humidity container shipping, and no requirement for constant-temperature warehouse, drastically cutting your storage cost and raw material waste.

2. Four Core Competitive Advantages of DL-Methionine for Foreign Bulk Buyers

2.1 100% Equivalent Bioactivity to L-Methionine, Dramatically Cut Raw Material Cost

DL-Methionine delivers identical physiological efficacy as L-Methionine. All commercial L-Methionine products are split and purified from DL-Methionine. Large-scale global feed groups, vegan food brands and supplement manufacturers choose DL-Methionine for mass purchase to slash procurement expenditure without downgrading finished product quality, making it the mainstream choice for cross-border amino acid bulk orders.

2.2 Excellent Moisture & Oxidation Resistance, Zero Loss During Long Shipment & Long-Term Stock

Sealed standard packaging offers superior moisture-proof and anti-oxidation performance. No powder caking, purity decline or deterioration occurs throughout transoceanic transportation. Constant-temperature storage is not mandatory; ordinary dry warehouses work perfectly, reducing inventory scrap loss and optimizing your overall production cost structure.

2.3 Three Grades Available, Complete Official Documents for Smooth Global Customs Clearance

Our factory mass-produces feed grade, food grade and pharmaceutical grade DL-Methionine, all indexes comply with additive standards set by EU, US and Southeast Asian countries.
A full set of export certificates is attached to every shipment: Certificate of Analysis (COA), Material Safety Data Sheet (MSDS), SGS third-party test report and Certificate of Origin (CO). These documents guarantee fast customs inspection and eliminate detention risks, meeting legal import demands of factories worldwide.

2.4 Multiple Physiological Functions to Create Differentiated Selling Points for Your Finished Goods

As an essential amino acid that cannot be synthesized by organisms, DL-Methionine features four core functions: liver protection and detoxification, hair & nail growth promotion, growth vitality improvement and dietary amino acid balance. When added to livestock feed, plant-based meal replacements and liver-protecting health capsules, it helps you form unique product features and raise product premium and sales volume in overseas markets.

3. Physiological Mechanism of DL-Methionine

DL-Methionine is a limiting essential amino acid that organisms cannot synthesize independently. Long-term insufficient intake will directly cause liver and kidney metabolic damage. Its core physiological effects are divided into four parts:

1. Liver detox support: It acts as a core methyl donor in the body to accelerate the decomposition and discharge of harmful substances and reduce the metabolic burden on liver and kidneys;
2. Skin and hair repair: It provides core raw materials for keratin synthesis to improve the hair and fur of livestock, as well as human nails and hair health;
3. Growth performance improvement: Optimize the metabolic efficiency of muscle cells to speed up the growth of pigs, chickens, cattle, sheep, fish and shrimp, and boost human exercise endurance;
4. Dietary nutrition balance: Fill the natural methionine gap in grains and plant raw materials such as corn, oats, soybeans, potatoes and spinach, and improve the overall amino acid ratio of feed and food.

4. Three Main Global Industrial Application Fields of DL-Methionine CAS 59-51-8

4.1 Feed Industry | Largest Global Consumption Track, Essential Additive for Breeding

DL-Methionine is a core limiting amino acid additive for livestock and aquafeed premix. Basic feed raw materials such as corn, soybean meal and wheat bran are naturally low in methionine. Precise supplementation can balance the amino acid structure of daily rations, effectively boost livestock weight gain speed and feed conversion rate, and reduce feed-to-meat ratio. It is exported in large quantities to overseas large-scale breeding farms and premix manufacturers all year round.

4.2 Food Industry | Clean Label Nutrition Fortifier for Global Vegan Food

Plant raw materials such as oats, wheat, potatoes and all kinds of vegetarian food naturally lack methionine. Food-grade DL-Methionine can be legally added to plant protein drinks, meal replacement powder, grain snacks and vegan food to fill the nutritional gap of amino acids. It perfectly fits the global trend of clean label and vegetarian health consumption, and is highly favored by overseas vegetarian food importers.

4.3 Pharmaceutical & Dietary Supplement Industry | Core Raw Material for Liver and Hair Care Health Products

Pharmaceutical-grade DL-Methionine is widely used in liver-protecting prescription medicines and oral medical nutritional preparations for people with liver damage and malnutrition. It is also a core raw material for producing hair care and liver-protecting dietary capsules. Health supplement brands in Europe, America and Southeast Asia maintain stable bulk purchases all year round.

5. Cross-Border Storage Specifications & Ocean Shipping Export Standards

5.1 Standard Storage Requirements

DL-Methionine should be stored in cool, dry and ventilated warehouses at normal temperature. All product packages must be fully sealed to isolate air and moisture. The warehouse shall be kept away from strong acids and strong oxidants. The product has a long shelf life and supports overseas buyers to stock up in large quantities for a long time.

5.2 Core Advantages of Cross-Border Export Transportation

This product is non-hazardous chemical without land and sea transportation restrictions. The standard export package is 25kg waterproof composite kraft bag, compression and drop resistant, fully suitable for container ocean transportation. We cooperate with mainstream international logistics service providers worldwide, and goods can be delivered to all major global ports to guarantee stable order delivery time.

6. Manufacturer Supply Strength | Shaanxi Astro Biology Co.,Ltd

Shaanxi Astro Biology Co.,Ltd is a professional domestic manufacturer integrating R&D and production of amino acid derivatives. We have self-built standardized dust-free production workshops and independent professional quality inspection laboratories, and keep thousands of tons of DL-Methionine spot inventory all year round. We provide one-stop full-process export supporting services for global B2B importers:

1. Three grades of feed / food / pharmaceutical available in stock, each batch is issued with an exclusive independent COA test report;
2. Free sample service: 100g-500g test samples are provided free of charge, buyers only bear international shipping costs, and bulk orders can be placed after laboratory indicators are verified to be qualified;
3. Flexible order threshold: 25kg small trial orders and full-container FOB bulk orders are both acceptable to meet the needs of large, medium and small overseas manufacturers;
4. Custom packaging solution: logo-free neutral export bags and one-stop OEM private label production;
5. Complete customs clearance documents. Professional foreign trade team provides full-process technical support including formula debugging, international logistics and customs clearance guidance.

7. Frequently Asked Questions from Overseas Buyers

Q1: How to choose between DL-Methionine and L-Methionine for industrial production?

A: The two have completely consistent physiological activity in vivo, while DL-Methionine has a lower purchase price and prominent comprehensive production cost advantages. L-Methionine is split and purified from DL-Methionine, and only used in a small amount for high-end medical injection preparations. Feed factories, ordinary food enterprises and oral health supplement brands give priority to DL-Methionine to effectively control overall production expenditure.

Q2: Can DL-Methionine meet the import standards of Europe, America, Southeast Asia and other countries?

A: The product fully meets the import compliance requirements of various countries. All test indicators of feed grade and food-grade DL-Methionine conform to international general additive standards, with complete third-party authoritative test documents attached, which can smoothly pass the customs inspection process of raw food and feed materials in the United States, the European Union and Southeast Asian countries.

Q3: What is the minimum order quantity of DL-Methionine? Can samples be sent for testing first?

A: The standard minimum order quantity is 25kg, and free test samples are supported. Customers can complete full testing of purity and microorganisms in their own laboratories, and place bulk orders after confirming that all indicators match their own production demands, minimizing the trial and error cost of overseas importers.

Q4: Is DL-Methionine prone to caking and deterioration during long-distance ocean transportation?

A: The product leads the industry in heat resistance, oxidation resistance and moisture resistance. It will not absorb moisture and cake under fully sealed packaging during transoceanic transportation, no constant temperature storage facilities are required, and it has excellent stability for long-distance cross-border transportation.

8. Apply for Exclusive FOB Wholesale Quotation of DL-Methionine

If you need the complete technical data sheet, electronic COA test report, sample application channel and customized global ocean logistics plan of DL-Methionine CAS 59-51-8, please contact our professional foreign trade team to customize an exclusive one-on-one raw material procurement plan and obtain the real-time FOB wholesale price.