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.
Basic Information
- Product Name: L-Pyroglutamic acid
- CAS Number: 98-79-3
- Molecular Formula: C?H?NO?
- Molecular Weight: 129.11 g/mol
- Synonyms: L-Pyroglutamate; (S)-5-Oxoproline; L-2-Pyrrolidone-5-carboxylic acid; Oxoproline
- Classification: Fine chemical, cosmetic raw material, pharmaceutical intermediate, food additive
Physical & Chemical Properties
- Appearance: White to off-white crystalline powder, odorless; no visible impurities, uniform particle size.
- Melting Point: 160-163°C; decomposes slightly above 165°C, no obvious color change during melting.
- Specific Rotation [α]??/D: -10.5° ~ -12.3° (c=2, H?O); stable under normal test conditions.
- Solubility: Soluble in water (25°C, miscible in proper proportion, forming a clear solution without precipitation); easily soluble in methanol, ethanol, dimethyl sulfoxide; slightly soluble in acetone, ether; insoluble in aliphatic hydrocarbons.
- Stability: Stable under ambient temperature and pressure (2-8°C storage recommended); incompatible with strong acids, strong bases and strong oxidizing agents; avoid excessive heat, direct sunlight and moisture; no polymerization or decomposition under normal storage conditions.
- Key Parameters: Purity ≥99.0% (HPLC); Water Content ≤0.5%; Chloride (Cl?) ≤0.02%; Heavy Metals (as Pb) ≤10 ppm; Arsenic (As) ≤1 ppm; Iron (Fe) ≤10 ppm; Residue on Ignition ≤0.10%.
Uses
L-Pyroglutamic acid (CAS 98-79-3) is a versatile fine chemical with wide applications in cosmetic, pharmaceutical, food and other fields. In the cosmetic industry, it is used as a moisturizing agent and skin conditioner, which can effectively improve skin hydration, enhance skin barrier function, reduce dryness and roughness, and is widely added to lotions, creams, serums, masks and other skin care products. In the pharmaceutical field, it serves as an important pharmaceutical intermediate, used for the synthesis of various drugs such as amino acid derivatives, antibiotics, and central nervous system drugs; it can also be used as a raw material for the preparation of oral and topical pharmaceutical preparations, with good biocompatibility. In the food industry, it is used as a food additive, acting as a flavor enhancer, nutritional supplement and stabilizer, which can improve the taste of food, supplement amino acid nutrients, and extend the shelf life of food. Additionally, it is used in the fields of fine chemical synthesis and biochemistry, as a reagent for peptide synthesis, enzyme activity regulation, and can be customized according to research and production needs for the synthesis of related derivatives.
Packaging & Storage
Packaging: Laboratory grade: 100g, 500g amber glass bottles with Teflon-lined caps to prevent moisture absorption and light exposure; industrial grade: 25kg HDPE barrels or paper-plastic composite bags with inner PE liners, labeled with product name, CAS number, batch number, manufacturing date, expiry date and safety information. Storage: Store in a cool, dry, well-ventilated warehouse at 2-8°C, keep tightly closed to prevent moisture absorption and air contamination; separate from strong acids, strong bases and oxidizing agents; avoid direct sunlight, excessive heat and moisture; do not mix with toxic and harmful substances. Shelf life: 24 months under recommended storage conditions. Transportation: Avoid transportation under high temperature, strong light and rain; prevent collision and damage to packaging; do not transport together with incompatible substances; keep cool during transportation in summer. Handling: Operate with gloves, goggles and anti-chemical protective clothing; use in a well-ventilated area to avoid inhalation of dust and contact with skin/eyes; wash skin thoroughly with soap and water after contact; if splashed into eyes, rinse with flowing water for 10-15 minutes and seek medical help; if there is leakage, collect with clean tools and properly dispose of waste.
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