Product Details
Chemical Name: Melatonine
Synonyms:Sodium tetraphenylborate; Tetraphenylboron sodium
Molecular Structure:
Product Typical Properties
| Items | Specification |
| Appearance | White to off-white granule,
No foreign matter |
| Assay | ≥ 99% |
| Loss on drying at 105℃ | 0.43% |
| Water Solubility | Clear |
| Acetone Solubility | Clear |
| Methanol Solubility | Clear |
Function
Sodium tetraphenylboron used for amperometric titration of amines, quaternary ammonium compounds, and potassium; Used as a titrant for amines and NH4Cl in the presence of potassium selective electrodes; K. Pb, Cs, NH4, and alkaloid precipitation reagents; Obtaining stable and crystalline ChemicalbookN-amide salts through ion exchange; Coupling with trifluoromethanesulfonic acid vinyl ester or aryl ester to form aromatic olefins and biaryl compounds; Precipitation of silver, cesium, copper (I), potassium, ammonium, rubidium, and thallium (I); Used for gravimetric and titration determination of potassium; For measuring blood potassium
Product Usage
- Identification of potassium ions
Sodium tetraphenylboron is a cheap and sensitive reagent for detecting potassium. In neutral, alkaline, or acetic acid solutions, sodium tetraphenylboron quantitatively reacts with potassium ions to form a white precipitate of potassium tetraphenylboron that is insoluble in water: K++[B (C6H5) 4] – → K [B (C6H5) 4] ↓
The detection limit of the reaction is 1 μ g. The minimum concentration of potassium ions is 2 μ G/mL. Ammonium ions, rubidium ions, and cesium ions also generate similar precipitates. Generally, ammonium ions need to be removed by calcination in advance (due to the instability of ammonium salts, they are easily decomposed during calcination), while rubidium and cesium ions can also be removed by precipitation method in advance.
Another commonly used reagent for identifying potassium ions is sodium cobalt nitrite, which can form yellow crystalline precipitates with potassium ions. Its main interfering ion is also ammonium ions.
- Organic synthesis
In acetonitrile solution, sodium tetraphenylboron reacts with acyl chloride and tertiary amine, and sodium chloride precipitates to obtain N-acyl quaternary ammonium salt:
RC (O) Cl+R3’N+NaBPh4 → [RC (O) NR3 ‘] [BPh4]+NaCl
Sodium tetraphenylboron can serve as a phenyl donor and undergo cross coupling with trifluoromethanesulfonic acid vinyl ester or aryl ester under palladium catalysis, generating aryl olefins or biphenyl derivatives with high yield.
- Others
Sodium tetraphenylboron has a high solubility in non-polar solvents and is easy to crystallize, which can be used to prepare and separate some organic metal complexes.
Product Packaging
25KG/BAG
Product Storage
Please store in a dry, cool and dark place
Product Details
Chemical Name: Glabridin
Synonyms:4-[(3R)-8,8-Dimethyl-3,4-dihydro-2H-pyrano[6,5-f]chromen-3-yl]benzene-1,3-diol
Molecular Structure:
Product Typical Properties
| Items | Specification |
| Appearance | White Powder |
| Loss on drying | 1.09% |
| Residue on ignition | 0.02% |
| Heavy metals | ≤10ppm |
| Arsenic salt | ≤2ppm |
| Total of bacterium | ≤100CFU/g |
| Yeast & Mold | ≤10CFU/g |
| Salmonella | Negative |
| E. coli | Negative |
Function
Glabridin (whitening gold) (Glycyrrhizin whitening essence PT-40) can penetrate into the skin and maintain high activity, whiten and effectively resist oxidation. Effectively inhibit the activity of various enzymes in the process of melanogenesis, especially tyrosinase activity. At the same time, it also has anti rough skin and anti-inflammatory and antibacterial effects. Guanggancao Ding is a whitening ingredient with good therapeutic effects and comprehensive functions.
Product Usage
- Inhibition of tyrosinase
Human tyrosinase is an essential enzyme that can regularly produce melanin, causing the skin or eyes to turn from brown to black. Therefore, inhibiting its generation can inhibit the generation of melanin. Light glycyrrhizin is the most expensive and effective whitening ingredient among all whitening ingredients. Its whitening effect is 232 times that of regular vitamin C, 16 times higher than hydroquinone, and 1164 times that of “arbutin”. Therefore, light glycyrrhizin is known as “whitening gold”.
- Anti inflammatory effects
Applying 0.5% light glycyrrhetinic acid solution, it was found that light glycyrrhetinic acid reduced skin inflammation caused by UV stimulation. Use a value to represent erythema on the skin. The degree of inflammation reduction can be calculated by recording the a-value (colorimeter reading) of light glycyrrhizin before and after irradiation. Glycyrrhetinic acid alone can achieve the effect of inhibiting cyclooxygenase.
- Antioxidant effect
Guanggancao Ding has a strong scavenging effect on free radicals, including vitamin C, vitamin E, and β- Carotenoids are recognized as the three major antioxidant and anti-aging kings. Glycyrrhetinic acid has an anti-aging ability comparable to vitamin E, and is a natural antioxidant used to reduce infectious skin diseases. It can enhance the effects of steroids.
- Cosmetics application
Guangglycyrrhizin has excellent anti-inflammatory, antioxidant and anti melanin formation effects, so it is used as a component of various cosmetics and medical care products (such as face cream, lotion, shower gel, etc.). It can be made into whitening face cream
Product Packaging
25KG/Drum
Product Storage
Please store in a dry, cool and dark place
Reviews
There are no reviews yet.