Hot Selling Rosmarinic Acid 98% Purity Rosemary Leaf Extract Wholesales Price

Product Name: Rosmarinic Acid
CAS Number: 20283-92-5
Molecular Formula: C₁₈H₁₆O₈
Molecular Weight: 360.31 g/mol
Appearance: White to off-white crystalline powder catechol

Rosmarinic acid is a naturally occurring polyphenolic ester composed of caffeic acid and 3,4-dihydroxyphenyllactic acid. It appears as a white to off-white crystalline powder with a faint characteristic odor. It is soluble in aqueous media and polar organic solvents, and practically insoluble in nonpolar solvents. The compound is found in various plants, including rosemary, sage, basil, mint, and lemon balm, and contributes to their antioxidant properties. Its molecular structure contains two moieties and an ester linkage, which contribute to its radical-scavenging capacity. Functionally, rosmarinic acid acts as a potent free radical scavenger and exhibits antioxidant, anti-inflammatory, antimicrobial, antiviral, and neuroprotective activities. It may also chelate metal ions and modulate signaling pathways such as NF-κB and MAPK. It is widely used in pharmaceutical, nutraceutical, cosmetic, and food applications. In cosmetics, it helps protect skin from oxidative stress and supports soothing effects. In foods, it can retard lipid oxidation and extend shelf life. In research, it is employed to study oxidative stress, inflammatory pathways, and enzyme inhibition. It is also used as a standard in analytical chemistry and is often isolated from plant extracts and purified by chromatographic methods. The compound should be stored in a cool, dry, dark place, protected from heat, moisture, and strong oxidizing agents. It is generally considered safe, but appropriate laboratory precautions are recommended.

For regulatory compliance (e.g., USP, EP, JP), raw material Vidarabine must meet several rigorous standards:

• Assay (by HPLC): 98.0% – 102.0% on an anhydrous basis.

• Related Substances: Limits for specific impurities, notably Ara-Hx (NMT 2.0%), as well as any unspecified individual impurity (NMT 0.1%) and total impurities (NMT 2.0%).

• Residual Solvents: Must comply with ICH Q3C guidelines (Class 1 and 2 solvents limited or absent).

• Heavy Metals: NMT 20 ppm (typically lower for injectable grades).

• Water Content (Karl Fischer): NMT 6.0% (the material is hygroscopic to a degree).

• Microbial Limits: Total aerobic microbial count (TAMC) ≤ 1000 CFU/g, absence of S. aureus, P. aeruginosa, and Candida albicans.