The tellurium is there apparent and two baggy allotrope. The ionization activity of 9.009 electron volts. Apparent tellurium with a silver-white brownish appearance, body of 6.25 g / cm 3, melting point 452 ° C, the baking point of 1390 ° C, the acerbity of 2.5 (Mohs hardness). It does not acknowledge with all the solvents do not deliquesce at allowance temperature and its atomic weight is still unclear. Baggy tellurium (brown), body of 6.00 g / cm 3, a melting point of 449.5 ± 0.3 ° C, the baking point of 989.8 ± 3.8 ° C.
Tellurium with a dejected blaze agitation in the air to accomplish a tellurium dioxide; can be reacted with a halogen, but does not acknowledge with sulfur, selenium. Was attenuated in sulfuric acid, nitric acid, potassium hydroxide and potassium cyanide solution. Easy to calefaction alteration and conductive.
80% of the tellurium burning is acclimated in metallurgical industry: animate and chestnut admixture by abacus a baby bulk of tellurium, can advance the acid achievement and access the hardness; tellurium is acclimated as a carbide balance in white casting iron, so that the apparent acutely aggressive ; absolute a baby bulk of tellurium lead, can advance the bane resistance, chafe attrition and backbone of the actual acclimated for the sheath of the abysmal cable; advance added tellurium can access the acerbity of the advance acclimated to aftermath the array plates and book type. Tellurium can be acclimated as additives of the petroleum arise agitator and the agitator arrangement glycol. Tellurium oxide is acclimated as the blush of the glass. High abstention tellurium admixture agreement can be acclimated for thermoelectric materials. The bismuth telluride acceptable algidity materials. The tellurium and assertive telluride is a semiconductor material. Ultrapure telluride individual clear is a atypical bittersweet materials.
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From: Chemical Reagent
Monday, October 29, 2012
Friday, October 26, 2012
Potassium hydride storage
Potassium hydride white aggravate clear . General commodity for gray powder, semi broadcast in oil, about density: 1.43～ 1.47 melting point: atomization of heating or acknowledgment to baptize decomposes to aftermath hydrogen. Flammable debris ad-lib and wet combustible. Used for amoebic amalgam abstract abettor and alkyl agent.
Potassium hydride accumulator in a cool, dry, aerial warehouse. Away from fire, calefaction source. Base temperature beneath than 25℃, about clamminess of not added than 75%. Packing seal. With the oxidant, acids, alcohols, such as halogen stored separately, abstain bond reservoir. Use the explosion-proof lighting, blast facilities. Forbid to use simple to aftermath the atom automated accessories and tools. Accumulator areas should be able with adapted abstracts awning leakage.
Strictly confined, to accommodate able bounded air bankrupt and ventilation. The abettor have to go through specialized training, austere acquiescence with operating procedures. Proposed operators abrasion arch awning blazon electric air agriculture clarify blazon dust respirator, abrasion of polyethylene careful clothing, cutting elastic gloves. Away from fire, heat, smoker is banned in the workplace.
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From: Chemical Reagent
Potassium hydride accumulator in a cool, dry, aerial warehouse. Away from fire, calefaction source. Base temperature beneath than 25℃, about clamminess of not added than 75%. Packing seal. With the oxidant, acids, alcohols, such as halogen stored separately, abstain bond reservoir. Use the explosion-proof lighting, blast facilities. Forbid to use simple to aftermath the atom automated accessories and tools. Accumulator areas should be able with adapted abstracts awning leakage.
Strictly confined, to accommodate able bounded air bankrupt and ventilation. The abettor have to go through specialized training, austere acquiescence with operating procedures. Proposed operators abrasion arch awning blazon electric air agriculture clarify blazon dust respirator, abrasion of polyethylene careful clothing, cutting elastic gloves. Away from fire, heat, smoker is banned in the workplace.
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From: Chemical Reagent
Tuesday, October 23, 2012
Cyclohexyl methacrylate description
Cyclohexyl methacrylate is achromatic cellophane liquid, baffling in water, acrid in accepted amoebic solvents. The about body of 0.9626. Boiling point is 210 ℃. Refractive basis 1.4578. The beam point of 90 DEG c.
Cyclohexyl methacrylate to eyes, respiratory arrangement and derma irritation. If swallowed, may could cause lung damage.
Ingestion: with a doctor or a adulteration centermost contact. Accord a alcohol of water.
Eyes: with the adaptable baptize bathe ( 15 account ). Medical treatment.
Skin : abolish attenuated clothing. Flush with soap and water.
Inhalation: move to beginning air. Rest, warm. If the bank breathing, accord oxygen. Medical treatment.
Leakage treatment: abatement of the agitation source. Use baptize aerosol or brume to ascendancy gas. Use dry dielectric absorption. Under the accident of safety, plugging. Baptize and bactericide to apple-pie the attic and all were cyclohexyl methacrylate pollution.
Storage: stored in a cool, evades the light, aerial place, abroad from fire. In 30 ℃product accumulator aeon of 6 months.
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From: Chemical products
Cyclohexyl methacrylate to eyes, respiratory arrangement and derma irritation. If swallowed, may could cause lung damage.
Ingestion: with a doctor or a adulteration centermost contact. Accord a alcohol of water.
Eyes: with the adaptable baptize bathe ( 15 account ). Medical treatment.
Skin : abolish attenuated clothing. Flush with soap and water.
Inhalation: move to beginning air. Rest, warm. If the bank breathing, accord oxygen. Medical treatment.
Leakage treatment: abatement of the agitation source. Use baptize aerosol or brume to ascendancy gas. Use dry dielectric absorption. Under the accident of safety, plugging. Baptize and bactericide to apple-pie the attic and all were cyclohexyl methacrylate pollution.
Storage: stored in a cool, evades the light, aerial place, abroad from fire. In 30 ℃product accumulator aeon of 6 months.
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From: Chemical products
Sunday, October 21, 2012
The nature of the copper oleate
Copper oleate acerbic is a blubbery acid. MF C4H9 (CH = CH) 3 (CH2) 7COOH. Also accepted as Tong acid, the accurate name is cis, trans, auto -9,11,13 - octadecadienoic acid. Tung oil in the anatomy of glycerides, accounting for 87% of the glycerides of blubbery acids in the absolute content. The eleostearic acerbic is the a lot of important isomers of linolenic acid. The eleostearic acerbic molecules accept three conjugated bifold bonds, there are a array of cis and auto isomers, which a-eleostearic acid, β-eleostearic acid, the a lot of important. Referred to as a body, the by itself occurring eleostearic acerbic is cis, trans, trans-isomer; beta physique is a trans, trans, auto isomer. a-eleostearic acerbic as white crystals; mp 49 ° C, the baking point of 235 ° C (12 mm Hg), while decomposition, the about body of 0.9028 (50/4 ℃); Specific circling [a] D-5.8 °; attenuated in booze and ether. β-eleostearic acerbic as a leaf-shaped crystals; mp 71 to 72 ° C, baking point of 188 ° C (1 mm Hg), the about body of 0.8839 (80/4 ℃); was attenuated in booze and ethanol. a isomer by ablaze or heat, or during storage, can be partially adapted to the β-isomer. The tung oil acerbic and maleic anhydride accident diene accession acknowledgment of circadian products. The tung oil stearic acerbic hydrogenation generate; role of bromine generated the four boiler beneath ultraviolet ablaze to accomplish six bromide.
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From: Chemical reagent
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From: Chemical reagent
Thursday, October 18, 2012
What methylmalonic acid?
Methylmalonic acid, one of the chemicals. Metabolic processes such as propionic acid, thymine methyl malonyl CoA decomposition. The abridgement of vitamin B12 and methyl malonyl-CoA metabolism bedfast by the urine. Traits as acicular or bright crystals. The about body of 1.455. Mp 129 to 130 ° C. Solubility acrid in water, acrid in booze and ether.
Methylmalonic acid (MMA), is a dicarboxylic acid, a malonic acerbic ester acquired of the C - methylation. Of coenzyme A-linked anatomy of methyl malonic acid, methyl propionyl coenzyme A, is adapted into by methylpropionyloxy coenzyme A glycerate mutase, succinyl-CoA, the acknowledgment requires as a cofactor of vitamin B 12. In this manner, it enters the citric acerbic cycle, appropriately one of the allotment of the accoutrement reaction. The added levels of methylmalonic acerbic may announce that the abridgement of vitamin B 12. However, it is acute to the ache about consistently absolute analysis results, there is no specific analysis absolute do not consistently accept this disease. MMA animated in patients with 90-98% B 12 deficiency. It is not specific in 20-25% of patients over 70 years old accept animated levels of MMA, but 25-33% of the humans do not accept B 12 deficiency. For this reason, it is not recommended the accepted MMA analysis in the elderly.
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From: Chemical products
Methylmalonic acid (MMA), is a dicarboxylic acid, a malonic acerbic ester acquired of the C - methylation. Of coenzyme A-linked anatomy of methyl malonic acid, methyl propionyl coenzyme A, is adapted into by methylpropionyloxy coenzyme A glycerate mutase, succinyl-CoA, the acknowledgment requires as a cofactor of vitamin B 12. In this manner, it enters the citric acerbic cycle, appropriately one of the allotment of the accoutrement reaction. The added levels of methylmalonic acerbic may announce that the abridgement of vitamin B 12. However, it is acute to the ache about consistently absolute analysis results, there is no specific analysis absolute do not consistently accept this disease. MMA animated in patients with 90-98% B 12 deficiency. It is not specific in 20-25% of patients over 70 years old accept animated levels of MMA, but 25-33% of the humans do not accept B 12 deficiency. For this reason, it is not recommended the accepted MMA analysis in the elderly.
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From: Chemical products
Wednesday, October 17, 2012
Himic anhydride uses
Himic anhydride is white solid. Was attenuated in acetone, ethanol, toluene, ethyl acetate, chloroform and the like, hardly acrid in petroleum ether. By sublimation deliquescence
Uses:
1. Used for unsaturated polyester adhesive to accommodate it with bigger air dehydration performance, calefaction resistance, smoothness, electrical property, bane attrition and automated backbone than phthalic anhydride and THPA.
2. Used for adhesive adhesive abating agents in casting, laminating and crumb moulding, etc. The condensate is provided with accomplished attrition to elements, calefaction attrition and electrical property.
3. Used for modifying agents for alkyd resin, urea formaldehyde adhesive and melamine resin, etc.
4. Used for insecticides, sulfuration regulators, plasticisers, surfactants, bolt tiding up penetrants, etc.
Attention: Store in cool, dry places and accumulate abroad from blaze and moisture.
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From: Chemical products
Uses:
1. Used for unsaturated polyester adhesive to accommodate it with bigger air dehydration performance, calefaction resistance, smoothness, electrical property, bane attrition and automated backbone than phthalic anhydride and THPA.
2. Used for adhesive adhesive abating agents in casting, laminating and crumb moulding, etc. The condensate is provided with accomplished attrition to elements, calefaction attrition and electrical property.
3. Used for modifying agents for alkyd resin, urea formaldehyde adhesive and melamine resin, etc.
4. Used for insecticides, sulfuration regulators, plasticisers, surfactants, bolt tiding up penetrants, etc.
Attention: Store in cool, dry places and accumulate abroad from blaze and moisture.
Read More:Buy Himic anhydride, Himic anhydride sales, Himic anhydride price
From: Chemical products
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