Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Product Description
L-(+)Sodium glutamate (CAS: 142-47-2), also known as Monosodium glutamate (MSG), L-Glutamic acid monosodium salt or Sodium L-glutamate, is the sodium salt of L-glutamic acid, an amino acid naturally found in many foods. It is a white, odorless crystalline powder with a characteristic umami taste, widely used as a flavor enhancer in the food industry. It also serves as a biochemical reagent, nutritional supplement additive, and intermediate in pharmaceutical synthesis, with extensive applications in food processing, biochemical research, and pharmaceutical fields.
Molecular Formula & Structure
Molecular Formula: C?H?NNaO?
Physical Properties
- Appearance: Colorless to white prismatic crystals or white crystalline powder
- Melting Point: Approximately 232 °C (lit., decomposition)
- Density: Approximately 1.635 g/cm3 (20 °C)
- Boiling Point: Approximately 333.8 °C at 760 mmHg
- Solubility: Freely soluble in water (71.7 g/100 mL at 20 °C); sparingly soluble in ethanol; practically insoluble in ether
- Stability: Stable under normal temperature and pressure; hygroscopic; decomposes at high temperature (150–160 °C) to form sodium pyroglutamate; avoid strong acids and oxidants
- Optical Property: Specific rotation [α]??/D: +24.8° to +25.3° (10% solution in 2N HCl)
Chemical Properties
- CAS Number: 142-47-2 (confirmed); EINECS Number: 205-538-1
- Chemical Type: Amino acid salt, flavor enhancer, biochemical reagent, food additive, pharmaceutical intermediate
- Molecular Weight: Approximately 169.11
- Chemical Characteristics: Contains one sodium ion and one L-glutamate ion; exhibits weak acidity and reactivity of amino acids; undergoes dehydration and cyclization under high temperature to form pyroglutamic acid derivative; participates in transamination and decarboxylation reactions in organisms.
- Application Type: Flavor enhancer for food industry; biochemical research reagent; nutritional supplement additive; intermediate for pharmaceutical synthesis; used in seasoning, canned food, instant food, and biochemical culture media.
- Toxicity: Low acute toxicity; LD?? (oral, rat) > 5000 mg/kg; excessive intake may cause discomfort in sensitive individuals; safe for general population at recommended doses.
Synthesis Method
- Raw Materials: Starch, rice, molasses (fermentation raw materials); sodium hydroxide (neutralizing agent); activated carbon (purification agent).
- Synthesis Route: Industrial production mainly adopts microbial fermentation: raw materials are saccharified, fermented by Corynebacterium glutamicum to produce L-glutamic acid, then neutralized with sodium hydroxide to form sodium glutamate, followed by decolorization, crystallization, and drying to obtain the final product.
Storage & Safety
- Storage: Sealed in airtight containers; store in a cool, dry, dark and well-ventilated environment; avoid moisture and direct sunlight; keep away from strong acids and oxidants.
- Package: Sealed, moisture-proof containers with clear labels; comply with food additive and biochemical reagent standards, indicating product name, CAS number, purity, batch number and storage requirements; available in crystalline powder form.
- Safety: Operate in a well-ventilated environment; avoid inhalation of dust; wear gloves and goggles to prevent skin and eye irritation; do not eat, drink or smoke during operation.
- Hazard: Non-flammable under normal conditions; may emit irritating fumes when heated to decomposition; avoid mixing with strong acids; use dry chemical or carbon dioxide for fire fighting.
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