Tungsten is a metallic element with the symbol W and atomic number 74, belonging to the VIB family of the sixth cycle in the periodic table. Tungsten is mainly a hexavalent cation in nature, with an iron radius of 0.68 Ã?? 10-10m. Due to the small radius of W6+ions, high electricity price, strong polarization ability, and easy formation of complex anions, tungsten is mainly in the form of complex anions [WO4] 2-, which combine with cations such as Fe2+, Mn2+, Ca2+in the solution to form precipitates of wolframite or scheelite.
specification Diamter(mm) Tolerance Max length(mm)
sintering,Forging,Spinning Forging and polishing 1.0-10 ±0.1 3000
10-20 ±0.1 2000
20-50 ±0.1 1500
50-70 ±0.2 1000
70-90 ±0.2 800
>90 Be customized
Specifications: main content Re 99.99% (calculated by subtraction method, excluding gas elements)
Application: Rhenium element standard sample; Rhenium element additive for various superalloys; Base material for various rhenium components; 3D printing and others
Other trace metal impurity , analysis method: ICP-MS Gas element (â?¤, analysis method: LECO
Na
0.0005%
Ti
0.0001%
Cu
0.0001%
Sb
0.0001%
Mg
0.0001%
V
0.0001%
Zn
0.0001%
Ta
0.0001%
Al
0.0005%
Cr
0.0005%
As
0.0001%
W
0.0005%
Si
0.0005%
Mn
0.0001%
Zr
0.0001%
Pb
0.0001%
P
0.0005%
Fe
0.0008%
Mo
0.0010%
Bi
0.0001%
K
0.0005%
Co
0.0001%
Cd
0.0001%
Se
0.0001%
Ca
0.0005%
Ni
0.0001%
Sn
0.0001%
Tl
0.0001%
O
0.01%
C
0.002%
N
0.001%
H
0.005%
Applications
1. It is used to make heat-resistant and corrosion-resistant alloy.
2.Used for making high temperature thermocouple, special filament and catalyst in organic synthesis industry.
It is a reddish brown, glossy columnar crystal or crystalline powder. Odorless, no change in air exposure, soluble in water and alcohol. Methylene blue is mild and safe to use, and it also helps to improve the respiratory function of fish.
Main Uses:
1) methylene blue can be used for dyeing;
2) Superior product methylene blue can be used for sterilization and disinfection;
3) Industrial grade methylene blue is used for dyeing cotton, acrylic fiber, hemp, silk and paper, and is also used for coloring bamboo and wood and for making ink (red ink) and color lake;
4) Analysis of pure methylene blue used as REDOX indicator, adsorption indicator and biological stain in chemical reagents, such as the determination of tin, boron and other metals, mixed indicator for serum protein test, shed cell test staining solution, basic methylene blue staining solution.
5) Analysis of pure methylene blue used for the determination of tin. Reductive titrant used to precipitate perchlorate and rhenate. Determination molybdenum by catalytic spectrophotometry.
6) Detoxification drugs, can be used for nitrite, sulfonamide, cyanide poisoning antidote.
7) Methylene blue for the development of new materials.
8) Bacterial stain.
Chloric acid is also called "gold chloride" and "gold chloride tetrahydrate". The chemical formula is HAuCl4 �· 4H2O. The molecular weight is 411.85. Yellow needle shaped crystals. Poisonous! Corrosive. Easily soluble in water, soluble in ethanol, ether.
1. It can be used for partial gold plating of semiconductor and integrated circuit lead frames, printed circuit boards, and electronic connectors
2. Mainly used for gold plating, special inks, medicines, porcelain gold and red glass, etc., as well as raw materials for the production of various gold compounds, photographic industry and chemical reagents.
3. Used to prepare stable nano-scale and underivatized colloidal gold particles in the form of solution
Use instructions
Important intermediates for organofluorine synthesis, advanced chemical synthesis, fluorine-containing surfactants, electroplating intermediates
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Introduction:
4-hydroxyethyl piperazine ethosulfonic acid (HEPES) is an important hydrogen ion buffer, which has a good buffer ability in the pH range of 6.8 to 8.2, and can control a constant pH for a long time. Using a concentration of 10 ~ 50mmol/L, the general culture medium containing 20mmol/L 4-hydroxyethyl piperazine taurine can have a good buffer capacity, and has no toxic effect on cells.
Application:
HEPES (4-hydroxyethyl piperazinethesulfonic acid) is a non-ionic amphoteric buffer with high polarity, and is inert to a variety of chemical reagents and enzymes. It does not participate in and interfere with the process of biochemical reactions, and has no inhibitory effect on enzyme chemical reactions. Therefore, it can be used specifically for the research of proteins and enzymes that are highly volatile and ph-sensitive to organelles and very volatile.
Buffer solution preparation:
(1)hepes buffer can be directly added to the prepared culture medium according to the desired concentration, and then filtered to remove bacteria. 2.38 g HEPES was added to each 1000ml of culture medium, the pH was adjusted to 7.2 with lNNaOH after dissolution, and the bacteria were removed by filtration before use. At this time, the concentration of HEPES was 10mmol/L.
(2) 100x storage solution (lmol/L) could also be prepared. Before use, 99ml culture solution was added to lml storage solution, and the final concentration was 10mmol/L. lmol/L (100x) hepes buffer was prepared as follows: 23.8gHEPES was dissolved in 90ml double distilled water, the pH was adjusted to 7.5-8.0 with lNNaOH, and then the water was fixed to 100ml, filtered to remove bacteria, divided into vials (2ml/ bottle), and stored at 4�ºC or -20�ºC.
Purpose:
1.Biological buffer; Reaction buffer, prehybridization buffer and hybridization buffer for isolation and analysis of RNA nuclear fraction; For RNA with T4RNA
2.Molecular biology grade is used for RNA3' -end labeling with T4 RNA ligase
3.Cell-cell adhesion, short-term cell aggregation culture, cleaning of tissue and cell buffer
Diethylenetriamine pentamethylene phosphonate sodium is an organophosphorus series scale inhibitor. Its molecular formula is C9H28O15N3P5, and its relative molecular weight is 573.2. Diethylenetriamine pentamethylene phosphonate sodium is non-toxic, miscible with water, has better scale inhibition and corrosion inhibition effect, and has good temperature resistance, which can inhibit the formation of carbonate, sulfate and phosphate scale. Especially when the pH value is 10-11, calcium carbonate still has a good scale inhibition performance, and the scale inhibition effect at this time is 2 to 3 times higher than that of hydroxy-ethylenediphosphonic acid and amino trimethylenephosphonic acid. Another outstanding feature is that the combination with manganese ions has a good corrosion inhibition ability on carbon steel and copper alloys.
Product Name:Betulinic acid
CAS:472-15-1
MF:C30H48O3
MW:456.7
EINECS:207-448-8
Mol File:472-15-1.mol
Melting point:295-298 �°C (dec.)(lit.)
alpha D25 +7.5�° (c = 0.37 in pyridine)
Boiling point:550.0�±33.0 �°C(Predicted)
Density 1.065�±0.06 g/cm3(Predicted)
refractive index 7.8 �° (C=0.9, Pyridine)
storage temp. Store at +4�°C
Betulinic acid is a pentacyclic trialkyl compound, which is widely present in nature. It was originally isolated from the bark of evergreen plants of the Rhamnaceae growing in Eastern Africa, but the main source is extracted and purified from the bark of birch .
PTA is one of the important bulk organic raw materials, widely used in chemical fiber, light industry, electronics, construction and other aspects of the national economy. At the same time, the application of PTA is more concentrated. More than 90% of PTA in the world is used to produce polyethylene terephthalate (PET). It needs 0.85-0.86 tons of PTA and 0.33-0.34 tons of MEG to produce 1 ton of pet. Polyester includes fiber chip, polyester fiber, bottle chip and film chip. In the domestic market, 75% of PTA is used in the production of polyester fiber; 20% is used in the production of bottle grade polyester, mainly used in the packaging of various drinks, especially carbonated drinks; 5% is used in film grade polyester, mainly used in packaging materials, films and tapes. It can be seen that the downstream extension product of PTA is mainly polyester fiber.
Application:
PTA is mostly used in the production of polyethylene terephthalate (polyester). It is an important raw material for polyester fibers, films, plastic products, insulating paints and plasticizers. It is also used in dyes and other products' production.
TTPC is widely used in industrial circulating cooling water systems, oilfield water injection systems, paper pulp and water systems, condensate water systems, industrial cleaning water systems, marine mollusk killing, and other industrial water systems for microbial killing, inhibition of microbial reproduction, and biological fouling treatment.
It has unique polymethyl branch chain structure, silky feeling, dry and extremely soft hand feel, excellent emollient. The compatibility of silicone oil is good, can solve the problem of low temperature precipitation of silicone oil, and is a stabilizer and coupling agent of silicone oil. The color has a good dispersion ability, low viscosity, skin feeling fresh, no greasy feeling. Commonly known as synthetic silk oil.
Squalene is a natural 30-carbon organic compound, although plant sources are now used as well, including amaranth seed, rice bran, wheat germ, and olives.
Squalene is light yellow to brownish red clear oily liquid,derived from the vegetable oil fatty acid.It is an important biological active substance which can be widely used in cosemetics,foods and other fields.
Sucrose benzoate is a white to off-white powder.
Sucrose benzoate can be used as a plasticizer for solid inks, solid coatings, thermosetting powder coatings and thermal printing toners.
Application:
It is used as a synthetic chemical raw material, a coating and cosmetic raw material, and as a high-performance rate-modifying additive for high-performance liquid crystal display film optical materials, holographic photosensitive materials, electronic image recording elements, and thermal transfer printing, Magnetic thermal transfer ribbon, electrostatically sprayed toner and thermal printing ink, etc. Different application occasions have corresponding requirements on the average substitution degree of sucrose benzoate and the content of each component in order to achieve a better use effect.
Manganese oxide is an oxide with the molecular formula MnO. It is a gray green powder. Insoluble in water, soluble in acid. Used as a catalyst, feed adjuvant, trace element fertilizer, and also in the manufacturing of pharmaceuticals, smelting, welding, and dry batteries. It can be obtained by thermal reduction of pyrolusite.
Sodium Ethyl Xanthate (NaEX) is a high-performance reagent designed for use in the mineral processing industry, specifically for the selective flotation of sulfide minerals. It is a synthetically produced organic compound that acts as a collector in the froth flotation process, enhancing the separation efficiency of valuable minerals from gangue materials.
* PM Proprylene Glycol Monomethyl Ether is a colorless and transparent liquid with low toxicity and good solubility. It is widelyused as solvents and additives in coatings, printing inks, dyes, pesticides, cosmetics and other industries. PM Proprylene GlycolMonomethyl Ether has excellent dissolving ability and can effectively dissolve various resins, pigments and additives, making theproducts made with good uniformity and stability. In addition, the evaporation rate of PGME is moderate, which can make thecoating or ink layer form good leveling and gloss during the drying process.
1.As a solvent; dispersant or diluent, it is used in industries such as coatings, inks, printing and dyeing, pesticides, celluloseand acrylates.
2. It can also be used as fuel antifreeze, cleaning agent, extraction agent and non-ferrous metal beneficiation agent. It can also be used as raw material for organic synthesis.
3.Mainly used as an excellent solvent for nitrocellulose, alkyd resin and maleic anhydride-modified phenolic resin, as an additive for jet fuel antifreeze and brake fluid, etc.; mainly used as a solvent, dispersant and diluent, and also used Used as fuel antifreeze, extraction agent, etc.
Salicylhydroxamic acid is a kind of high efficient chelating collector for rare metal oxidized minerals. It has the advantages of good selectivity and strong collecting power when used in mineral processing of rare metals. Salicylhydroxamic acid is mainly used as collector or extractant of rare earth ore, copper oxide, lead-zinc oxide ore, gold ore, kaolin and organic synthesis intermediates.
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