Methylene Chloride 99.99% min

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Shanghai
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TT OR LC
Min Order Qty:
-
Supply Capability:
10000MT m.t./month

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Product Description:

Methylene Chloride

Quality Standard:Q/321200GDH011-2011

Item
Excellent Grade
First Grade
Appearance
Clear, no suspended matter, no mechanical impurity
Chroma(Pt-Co) ≤
10
10
Acidity (as HCL) (%) ≤
0.0004
0.0004
Moisture   (%) ≤
0.010
0.020
evaporated residue    (%) ≤
0.0005
0.0005
Chloride   (%) ≤
0.0005
0.0005
Purity   (%) ≥
99.95
99.90

MF:CH2CL2 UN NO.:1593

Specification:

Color(APHA),Pt-Co:10

Acidity(HCl),%≤0.0004

Moisture,%≤0.006

Purity,%≥99.99

Residue after evaporation%,≤0.0015


It's widely used as pharmaceutical intermediates, polyurethane foaming agent / blowing agent to produce flexible PU foam, metal degreaser, oil dewaxing, mold discharging agent and decaffeination agent, and also in adhesive, agrochemical and film industry, etc.  


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Q:what are the advantages and disadvantages of taking health care agents?
Obviously, the advantages of taking health care agents are targeted, quick and effective; the disadvantage is to maintain the problem after the effect is like a hormone therapy, hormone therapy after the effect is very good, and physically strong after the virus may be recovered It is very effective, some poor physical is not the case. Poor physique, perhaps more suitable for "balanced dietary supplement".
Q:What are the effects of inorganic salts on plant growth?
N: promote cell division and growth, so that leaves grow lush. Lack of performance: plant thin and thin, leaves yellow, severe leaves were light brown.
Q:Calcium is not an inorganic salt
No, inorganic salts are compounds, calcium is simple. But the body of inorganic salts in the calcium content accounted for a larger proportion.
Q:What cells produce the collagen and inorganic salts of bone matrix?
The collagen is produced by chondrocytes. The minerals that make up the bone are precipitated by osteoblasts.
Q:What is the inorganic salt, is not the organic salt and is not the inorganic salt
Inorganic salt: Acid-base reaction product without carbon element However, the chemical properties such as carbonates and carbon oxides are the same as those of inorganic substances. Therefore, they are also classified as inorganic substances
Q:what is the function of salts in DNA extraction?
DNA can be purified for DNA sequencing or for restriction digestion by precipitation in an alcohol/water mixture in the presence of a high concentration of inorganic salt. DNA is recovered from the aqueous solution by addition of salt to final concentrations of 0.8M LiCl, 0.3-0.5M NaCl, NaOAc, or 2.5M NH4Ac and an appropriate volume of alcohol (30%-50% final percentage isopropanol; 60%-80% final percentage ethanol), storage for a brief period of time at -20°C or -70°C, followed by centrifugation. Subsequent desalting of the DNA pellet involves rinsing in 70% alcohol, recentrifugation and re-suspension in appropriate buffer.
Q:How to add inorganic salts
Helicobacter pylori can cause a variety of stomach problems, including gastritis, gastric ulcer, duodenal ulcer, non-ulcerative indigestion, gastric cancer. Therefore, the eradication of Helicobacter pylori has become an important measure for the treatment of modern gastrointestinal diseases. To identify patients with Helicobacter pylori infection, the clinical need for a high sensitivity, specificity, fast, simple, safe, inexpensive Hp diagnostic method, that is, carbon 14 breath test. The examination and painless, noninvasive, fast and simple, no cross the advantages of infection, experts at home and abroad have been recommended for the diagnosis of Hp gold standard, has been widely used in clinical practice.
Q:How can experiments prove that there are inorganic salts in the leaves of plants
The experimental leaves used to dry, crushed into powder or sintered ash, and then the analysis of mineral elements, we can learn.
Q:Anyone familiar with GC? Is it safe to put an alcohol + inorganic salt water mix into a GC?
Do not let salts enter the GC. You will have to perform an extraction step and run that. Salts can precipitate in the column or degrade into reactive species that can corrode the GC. Water is OK since it will not destroy the column (I've run aqueous solutions before), but salts are not.
Q:Now need to determine the freezing point of inorganic salt solution, what kind of freezing point instrument is more accurate?
The full name of the antifreeze should be called antifreeze coolant, meaning antifreeze function of the coolant, antifreeze can prevent the cold season when the cooling coolant and shrink the radiator and freeze the engine cylinder block, but to correct a misunderstanding, antifreeze Liquid is not only used in winter, the car normal maintenance projects, each driving a year, need to replace the engine antifreeze, special vehicle antifreeze replacement frequency is higher.

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