**L-Isoleucine – Amino Acid Specification and Properties**
**English Name:** L-Isoleucine; (2S, 3S)-2-Amino-3-methylpentanoic acid; L-α-Amino-β-methylvaleric acid; L-2-Amino-3-methylpentanoic acid; L-2-Amino-3-methylvaleric acid
**Other Names:** L-isoleucine; L-isoflash white amino acid; L-α-amino-β-methylvaleric acid
**CAS Number:** 73-32-5
**Molecular Formula:** C₆Hâ‚₃NOâ‚‚
**Molecular Weight:** 131.18 g/mol
**Grade:** Biochemical Reagent (BR)
**Purity:** ≥99.0%
**Specific Optical Rotation:** +39.5° to +41.5°
**Loss on Drying:** ≤0.2%
**Heavy Metals (as Pb):** ≤10 ppm
**Chloride (as Clâ»):** ≤0.02%
**Sulfate (as SO₄²â»):** ≤0.03%
**Ammonium Salt (as NHâ‚„âº):** ≤0.02%
**Arsenic (as As):** ≤1 ppm
**Iron (as Fe):** ≤10 ppm
**Appearance:** White crystalline powder or crystals
**Taste:** Bitter
**Sublimation Point:** 168–170°C
**Decomposition Temperature:** 284°C
**Solubility in Water:** 41.2 g/L at 25°C
**Solubility in Organic Solvents:** Slightly soluble in hot ethanol and hot ether; insoluble in ether
**Applications:**
L-Isoleucine is widely used in biochemical research, microbiological studies, and tissue culture preservation. It plays a key role in protein synthesis and is an essential branched-chain amino acid. This compound is also commonly used as a standard in analytical chemistry and in the development of pharmaceutical formulations.
**Storage Conditions:** Store in a cool, dry place, away from direct sunlight. Keep container tightly closed when not in use. Recommended storage temperature: 2–8°C for long-term stability.
**Safety Note:** Handle with care. Avoid inhalation of dust. Use appropriate personal protective equipment (PPE) during handling.
This product is suitable for laboratory use and meets high-quality standards for scientific research.
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