Liquid color chemical properties

Observable Characteristics - Physical State (as normally shipped) Liquid Color Colorless to slight yellow Odor Extremely sharp - lachrymator piercing and disagreeable extremely Physical and Chemical Properties - Physical State at 15 °C and 1 atm. Liquid Molecular Weight 56.1 Boiling Point at 1 atm. 127, 53, 326 Freezing Point -125, -87, 186 Critical Temperature 489, 254, 527 Critical Pressure 737, 50.0, 5.08 Specific Gravity 0.843 at 20 °C (liquid) Vcq>or (Gas) Density 1.94 Ratio of Specific Heats of Vapor (Gas) 1.1487 Latent Heat of Vaporization 216, 120, 5.02 Heat of Combustion -12500, -6950, -290 Heat of Decomposition Not pertinent. 

Observable Characteristics - Physical State (as shipped) Liquid Color Colorless Odor Strong. Physical and Chemical Properties - Physical Slate at 15 C and I atm Liquid Molecular Weight 130,23 Boiling Point at I atm 564,5, 184,7, 457,9 Freezing Point < 158, <70, <343 Critical Temperature 711, 377, 650 Critical Pressure 512, 34.8, 3.53 Specific Gravity 0.834 at 20°C (liquid) Vqpor (Gas) Specific Gravity Not pertinent Ratio of Specific Heats of Vapor (Gas) Not peTt ntt L-,LaterU Heat of Vaporization 167, 92.8, 3.89 Heat of Combustion -11,-9,710, -406.5 Heat of Decomposition Not pertinent. 

Chemical Designations - Synonyms No common synonyms Chemical Formula Not pertinent. Observable Characteristics - Physical State (as shipped) Liquid Color. Colorless Odor Gasoline. Physical and Chemical Properties - Physical State at 15 XI and I atm. Liquid Molecular Weight Not pertinent Boiling Point at I atm. 58 - 275, 14 - 135, 287 - 408 Freezing Point Not pertinent Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 0.71 - 0.75 at 15°C, (liquid) Vapor (Gas) Specific Gravity 3.4 Ratio cf Specific Heats cf Vapor (Gas) Not pertinent Latent Heat of Vaporization 130 - 150, 71 -81, 3.0 - 3.4 Heat of Combustion -18,720, -10,400, -435.4 Heat of Decomposition Not pertinent. 

Chemistry is concerned with the properties of matter, its distinguishing characteristics. A physical property of a substance is a characteristic that we can observe or measure without changing the identity of the substance. For example, a physical property of a sample of water is its mass another is its temperature. Physical properties include characteristics such as melting point (the temperature at which a solid turns into a liquid), hardness, color, state of matter (solid, liquid, or gas), and density. A chemical property refers to the ability of a substance to change into another substance. For example, a chemical property of the gas hydrogen is that it reacts with (burns in) oxygen to produce water a chemical property of the metal zinc is that it reacts with acids to produce hydrogen gas. The rest of the book is concerned primarily with chemical properties here we shall review some important physical properties. 

In most cases, ointments, suppositories, ophthalmic, and parenteral products assume the color of their ingredients and do not contain color additives. In addition to esthetics and the certification status of a dye, a formulation pharmacist must select the dyes to be used in a particular formula on the basis of the physical and chemical properties of the dyes available. Of prime importance is the solubility of a prospective dye in the vehicle to be used for a liquid formulation or in a solvent to be employed during a pharmaceutical process (such as when the dye is sprayed on a batch of tablets). In general, most dyes are broadly grouped into those that are water-soluble and those that are oil-soluble few, if any, dyes are both. 

THTOPHENE. [CAS 110-02-1]. (CH C.H)2)S, formula weight 84.H, colorless liquid resembling benzene in odor, mp —30°C, bp 84°C. sp gr 1,070. Thiophene and its derivatives closely resemble benzene and its derivatives in physical ancl chemical properties. Thiophene is present in coal tar and is recovered in the benzene distillation fraction (up to about 0.5% of the benzene present). Its removal from benzene is accomplished by mixing with concentrated sulfuric acid, soluble thiophene sulfonic acid being formed. Thiophene gives a characteristic blue coloration with isatin in concentrated sulfuric add. 

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