Browse 961 Chemical Products and Raw Materials
R12
Dichlorodifluoromethane CCL2F2, commonly known as Freon 12. Colorless, odorless, non corrosive gas, stable chemical properties, non ignition, non-toxic. Soluble in a variety of organic solvents. It is easy to compress into liquid, and vaporize immediately when pressure is relieved. At the same time, it absorbs a lot of heat energy, so it is a good refrigerant.
R134a
Tetrafluoroethane, commonly known as R134a, HFC134a and HFC-134a, is a colorless, nontoxic and incombustible chemical substance, insoluble in water (67mg / L, 25 ℃), soluble in ether, with a ozone depletion potential of 0. Its thermodynamic performance is very similar to that of CFC-12, comparable to that of CFC-12 in safety, and has been recognized as the best substitute for CFC-12.
R143a
1,1,1-trifluoroethane, commonly known as hfc143a. The ODP of trifluoroethane is 0, which has no damage to the ozone layer. It is an important part of the new mixed refrigerants r-404a, R-408a and r-507a, and can also be used as deep refrigerants alone. It can be used as refrigerant and is an important component to replace r-502.
R152a
1,1-difluoroethane, commonly known as HFC-152a, is an important organic fluorine industrial product. It is a colorless gas with weak odor, insoluble in water, but soluble in alcohol and ether solvents, with a boiling point of - 24.7 ℃. It is a low toxic chemical, with anesthetic effect and flammability in high content. It will react violently in case of strong oxidant. Difluoroethane is an important raw material for the production of fluoroethylene and vinylidene fluoride. It can also be used as refrigerant and aircraft propellant. The ODP of HFC-152a is 0, and the GWP is 0.03.
R227ea
Heptafluoropropane is a new type of efficient fire extinguishing gas, which has the characteristics of colorless, tasteless and strong insulation, and is not easy to cause secondary pollution in the process of fire extinguishing. It is widely used in the field of fire fighting.
R236cb
Widely used in new refrigeration equipment (ultra-low temperature, deep cold) in the process of initial installation and maintenance of re add.
R290
A colorless odorless flammable gas alkane with three carbon atoms, molecular formula ch3ch2ch3, melting point - 189.7 ℃, boiling point - 42.1 ℃, relative density 0.5853 (- 45 / 4 ℃), refractive index 1.2898, heavier than air, often staying in low place, forming explosive mixture with air, explosion limit 2.4% - 9.5% (volume), easily soluble in ether, soluble in alcohol, benzene and chloroform, slightly soluble in acetone, insoluble in water However, it is easy to form solid hydrate with water at low temperature, which causes the blockage of natural gas pipeline. The critical temperature is 96.8 ℃, and the critical pressure is 4.24mpa. Chemical properties are not active, but halogenation and other reactions can occur. It exists in oil pyrolysis gas and natural gas.
R406a
R406a mixed refrigerant is a mixture of HCFC-22, hcfc-142b and R-600a. It is a colorless gas at room temperature and a colorless transparent liquid at its own pressure. It is an alternative to R500 and R12. It is superior to R12 in environmental protection, energy saving and refrigeration volume, and can directly replace R12, but the power consumption will increase by 18%.
R407c
R407C is composed of R32 refrigerant and R125 / refrigerant plus R134a refrigerant in a certain proportion. It is an environmentally friendly refrigerant that does not damage the ozone layer
R409a/b
R409a/b is a mixture of refrigerant R22, r124 and R142b. It is a colorless gas at room temperature and a colorless transparent liquid at its own pressure. It is a substitute of R12 and mainly used in refrigeration system.
R410a
R410A: it is a new type of environmental protection refrigerant, which does not damage the ozone layer. Its working pressure is about 1.6 times of that of ordinary R22 air conditioner, and its refrigeration (heating) efficiency is high. R410A new refrigerant consists of two quasi azeotropic mixtures, R32 and R125, each 50%, mainly composed of hydrogen, fluorine and carbon elements (expressed as HFC), which are stable, nontoxic and excellent in performance. At the same time, because there is no chlorine element, it will not react with ozone, that is, it will not damage the ozone layer. In addition, the performance of air conditioning with new refrigerant will also be improved. R410A has been recognized as the most suitable refrigerant to replace R22 in the world, and has been widely used in Europe, America, Japan and other countries. The global trend and Prospect of R410A replacement in major international markets and the trend of entering the international market.
R415b
R415b is rated as "a national key environmental protection practical technology in 1999" by the State Environmental Protection Administration of China, and it is the substitute of ODS recommended by the State Environmental Protection Administration in 2004.
R417a
R417A is compatible with the existing refrigeration oil and is suitable for the typical R22 direct expansion (DX) system. It is very close to the operating pressure and efficiency of R22, and it is a long-term solution to replace R22, without changing the equipment and system. It is suitable for all kinds of air conditioning and refrigeration units using R22.
R507
R507, like R404A, is an environmentally friendly refrigerant to replace R502, but r507 can usually reach a lower temperature than R404A. R507 is applicable to new commercial refrigeration equipment (supermarket refrigeration cabinet, cold storage, display cabinet, transportation), ice making equipment, transportation refrigeration equipment, marine refrigeration equipment or renewal equipment with medium and low temperature, and it is applicable to all R502 normal operation environments.
R508B
R-508b is an environmental protection refrigerant r-508b, also known as r508b. Its trade names include Suva 95, genetron 508b, etc. R-508b is an environmental friendly azeotropic refrigerant which does not contain ozone depleting CFC and HCFC substances. It has been recognized and recommended by most countries in the world as the mainstream ultra-low temperature environmental refrigerant. It is widely used in the initial installation and RE addition in the maintenance process of new refrigeration equipment (ultra-low temperature, deep cooling). Comply with EPA, snap and UL standards of American environmental protection organization and A1 safety class of ASHRAE (this is the highest level, harmless to human body).
R600a
It is colorless combustible gas under normal temperature and pressure. Melting point - 159.4 ℃. Boiling point - 11.73 ℃. Slightly soluble in water, soluble in ethanol, ether, etc. The explosive mixture is formed with air, and the explosion limit is 1.9% - 8.4% (volume). It mainly exists in natural gas, refinery gas and cracked gas. It can be obtained by physical separation and n-Butane Isomerization. It is mainly used to produce Isooctane by alkylation with isobutylene, as the improver of gasoline octane number. It can also be used as a refrigerant.
Ranitidine Hydrochloride
Ranitidine is a histamine H2-receptor antagonist that inhibits stomach acid production. It is commonly used in treatment of peptic ulcer disease (PUD) and gastroesophageal reflux disease (GERD). Ranitidine is also used alongside fexofenadine and other antihistamines for the treatment of skin conditions such as hives. Ranitidine is also known to give false positives for methamphetamine on drug tests.
Rapamycin
Rapamycin is a macrolide compound obtained from streptomyces hygroscopicus that acts by selectively blocking the transcriptional activation of cytokines thereby inhibiting cytokine production. Rapamycin is a member of the macrolide immunosuppressant family and a FRAP inhibitor. Rapamycin exhibits binding and inhibitory actions to the FK506 binding protein (FKBP5) proline rotamase via simultaneous binding by FKBP12 and FRAP. FRAP (RAFT1) proteins exhibit homology to PI 4- and PI 3-kinases, which have PI 4-kinase and autophosphorylating activities.The rapamycin/FKBP complex does not inhibit the FRAP PI 4-kinase activity, but does inhibit FRAP autophosphorylation. Rapamycin is unique in its ability to inhibit lymphokine induced cell proliferation at the G1 and S phase as well as an irreversible cellular arrest at the G1 phase in S. cerevisiae cells. It also exhibits selective signal blocking leading to the activation of p70/85 S6 kinase, which is potentially due to the inhibition of FRAP autophosphorylation or protein kinase activity. Angiogenesis inhibition is also exhibited,possibly through the inhibition of the Akt pathway. Rapamycin is an inhibitor of mTOR.
Regorafenib
Regafinil is a small multi kinase inhibitor, its molecular structure is similar to sorafenil, the difference is only the fluorine atom on the intermediate benzene ring. It is a new molecular targeted drug developed by Bayer company. On September 27, 2012, it was approved by the US Food and Drug Administration (FDA) for the treatment of metastatic colorectal cancer. On February 25, 2013, it was approved by the FDA for the treatment of advanced GIST patients who could not be operated and other treatment methods were invalid. Regafinil is a novel oral multi-target protein kinase inhibitor, which can block tumor cell proliferation, inhibit tumor angiogenesis and regulate tumor microenvironment, and has good antitumor activity. "Correct" study confirmed that it is a TKI with therapeutic activity for patients with metastatic colorectal cancer. Based on the data of this study, in September 2012, the U.S. FDA approved it to treat patients with MCRC who have failed to receive multi-line standard treatment. In China, a multicenter phase III clinical trial of regafinil for the treatment of Chinese patients with MCRC is under way.
Resorcinol
Resorcinol has bactericidal, fungicidal and anti-itching effect with the bactericidal effect being 1/3 of the phenol and also a low irritating and corrosive property. At low concentration, it can play the role promoting the regeneration of horny while having keratin exfoliation effect at high concentration. It is mainly used for rubber adhesives, plastics, synthetic resins, synthetic fibers, dyes, preservatives, anti-itch, anti-fungal agent, analytical reagent and can also be used to treat ringworm, eczema, seborrheic dermatitis, acne and psoriasis.
Resveratrol
Resveratrol is a kind of natural antioxidant, which can reduce blood viscosity, inhibit platelet coagulation and vasodilation, keep blood smooth, prevent the occurrence and development of cancer, and has the preventive and therapeutic effects of anti atherosclerosis, coronary heart disease, ischemic heart disease and hyperlipidemia. Inhibition of tumor also has estrogen like effect, which can be used to treat breast cancer and other diseases. It can delay aging and prevent cancer. It is high in red grape skin, red wine and grape juice. Studies have shown that the integrity of chromosomes will be destroyed with human aging, and resveratrol can activate a protein to repair chromosome health, thus playing a role in delaying aging.
Retinoic Acid
Retinoic acid is a common drug in dermatology. It is the intermediate product of vitamin A (methanol) metabolism in vivo. It mainly affects the growth of bone and epithelial metabolism, promotes the proliferation and renewal of epithelial cells, inhibits the proliferation and differentiation of keratinocytes, and normalizes hyperkeratosis. Therefore, it has a certain therapeutic effect on many diseases with complete, incomplete and hyperkeratosis, It can treat many kinds of skin diseases. The penetration of local application to the skin is very fast, which can significantly increase the epithelial cell renewal. This kind of medicine has a strong and rapid inhibitory effect on the secretion of sebaceous glands, which can reduce the secretion of sebaceous glands. In addition, the product also has anti-tumor, promoting wound healing and anti infection effects.
