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R 134a is a refrigerant to replace CFC -12 in mobile air conditioning and in residential,

commercial and industrial refrigeration systems. It is also used as a blowing agent in rigid

foam insulation, and an important component of blends such as R 404a , R 407c , etc.

Physical Properties	Molecular weight	102.03
	BP, °C	-26.1
	Ice point °C	-
	Critical temperature , °C	101.1
	Critical pressure ,Mpa	4.07
	Density of saturated liquid25 °C,(g/cm3)	1.207
	Specific heat of liquid 25 °C,[KJ/(Kg• °C)]	1.51
	Solubility(water,25 °C)%	0.15
	ODP	0
	GWP	0.29
	Critical density,g/cm3	0.512
	Vaporization heat under BP,KJ/Kg	215
Quality Index	Purity%≥	99.9
	Moisture,PPm ≤	0.001
	Acidity,PPm ≤	0.00001
	Residue on evaporation ,PPm ≤	0.01
	Appearance	colorless , no cloudy
	Odor	no smell

Q: Why the silicon hydride less, a lot of hydrocarbons. (Why did not you find silicon-based creatures) and why are so many oxides of silicon, little carbon oxides?: Silicon oxide than carbon, because the outermost layer of silicon has three levels ah, (SiO, SiO2, Si2O6) silicon less organic matter, the front also said that the organic instability of silicon

Q: Organic organic compounds are organic matter?: Organic matter is defined as the presence of hydrocarbons and their derivatives, and the presence of covalent bonds is a feature of them.

Q: What is the relationship between hydrocarbon and hydrocarbon derivatives?: The hydrocarbon is the parent of the organic compound, and the other various organic compounds can be regarded as derivatives of one or more hydrogen atoms in the hydrocarbon molecule being replaced by atoms or radicals of other elements.

Q: What is "organic" and "inorganic" in chemistry?: Inorganic compounds are inorganic compounds, usually refers to non-carbon compounds. , Alkali, salt and so on.

Q: Peracetic acid is not: A series of compounds produced by the substitution of hydrogen atoms in other molecular or atomic groups as hydrocarbon derivatives, peroxyacetic acid is CH3COOOH, and should be considered

Q: Is the heterocyclic compound not a derivative of cyclic hydrocarbons? why?: Aromatic hydrocarbons referred to as "aromatic", usually refers to the molecules containing benzene ring structure of hydrocarbons. Is a kind of closed-chain class.

Q: NH4HCO3 and so have C atoms ah, why still inorganic: Not all carbon compounds are organic compounds, CO, CO2, carbonic acid, carbonates (including salt and acid salts), metal carbides, cyanides, thiocyanates are inorganic compounds.

Q: What is organic?: Simply refers to the organic ingredients containing organic ingredients. The real organic cosmetics are organic plants as the main raw material, do not add artificial spices, artificial colors, oil-free ingredients, the added preservatives and surfactants must be strictly limited, and the manufacturing process to comply with the relevant provisions, can not use animals Experiments and the use of radiation sterilization products. In general, the certification of organic skin care products must meet the following conditions: First, the organic environment, the closest growth of natural growth, production base (ie, the environment) are not damaged, water (irrigation water), soil (soil ), Gas (air) is not contaminated. Second, organic cultivation, no artificial fertilizer irrigation or artificial feed, without antibiotics, chemical insecticide, without genetic variants. Third, the organic processing and production projects, including the harvest after washing, finishing, packaging, processing, transportation, storage, sales and other sectors) did not subject to secondary pollution.

Q: Why can organic matter be unique in chemical substances? What is the nature of the C atom?: Carbon, and can be spun, sp2, sp3 hybrid, so CH, CC, CO, CN, C = C, C = O, C = N and other covalent bonds can be formed and the key size is moderate, So these keys can also be more easily broken and generate new compounds. For silicon, the type of hybrid is mainly sp3 (no O = Si = O this molecule exists), but the Si-O bond bond energy is greater than Si-C, Si-Si, Si-H, so these keys are It is easy to break to produce SiO2, so there is the most natural Si-O compounds, and this compound is very stable, difficult to break down or other reactions.

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