Physical Properties

• Appearance: Pale yellow to dark brown powder, characteristic yeast flavor, no visible impurities, uniform particle size.
• Melting Point: No obvious melting point; decomposes at temperatures above 200 °C.
• Boiling Point: 365.8±21.0 °C at 760 mmHg (lit.), decomposes before boiling.
• Solubility: Easily soluble in water (2% aqueous solution is clear), slightly soluble in ethanol; insoluble in non-polar organic solvents.
• Density: 1.4±0.1 g/cm3 (20 °C, lit.), bulk density 400-500 kg/m3.
• Optical Activity: No optical activity, no chiral center.
• Moisture Absorption: Strongly hygroscopic, prone to agglomeration when exposed to air with high humidity.
• pH Value: 5.0-7.5 (2% aqueous solution, 25 °C); loss on drying ≤8%; ignition residue ≤15%.

Chemical Properties

• Chemical Category: Natural organic mixture, mainly composed of amino acids, peptides, nucleic acids, B vitamins and minerals, also known as Autolyzed yeast extract.
• Stability: Stable under normal temperature and pressure (sealed); belongs to combustible solids; stable in dry environment, easy to absorb moisture and agglomerate when damp.
• Acid-Base Property: Weakly acidic to neutral; pH value of 2% aqueous solution is 5.0-7.5, stable in neutral and weakly acidic environments.
• Hydrolysis: Stable under normal storage conditions; no obvious hydrolysis; can be decomposed by high temperature and strong acid/alkali.
• Photostability: Relatively stable to light; long-term exposure to strong light will not cause obvious decomposition, but may affect color.
• Reactivity: Non-toxic, natural and safe for food use; has flavor-enhancing properties; compatible with most food additives; rich in nutrients, easy to biodegrade.

Chemical Structure

Applications

• Food industry: Used as natural flavor enhancer in condiments, instant noodles, meat products and beverages, enhancing umami and mellow taste.
• Microbiology field: Used as nutritional additive in microbial culture media, providing amino acids and vitamins for microbial growth.
• Pharmaceutical industry: Used as auxiliary material for vitamin B1 deficiency and indigestion auxiliary treatment, rich in B complex vitamins.
• Feed industry: Used as feed additive to promote animal growth and improve immunity, selecting feed-grade products that meet safety standards.
• Other fields: Used as non-animal source medium raw material in biotechnology, realizing the replacement of animal serum components.

Storage & Handling

• Storage: Sealed, cool, dry and well-ventilated; away from sunlight, heat and moisture; avoid agglomeration caused by moisture absorption.
• Temperature: 2-30 °C for long-term storage; shelf life 36 months under proper conditions; use as soon as possible after opening.
• Packaging: Sealed plastic drum or aluminum foil bag (25kg/500g), moisture-proof and sealed; small packages for laboratory use.
• Precautions: Avoid inhalation of dust; wear protective gloves and masks during operation; rinse with plenty of water immediately if contacted with eyes; classify and store with food and feed raw materials.

Description