Ether, absolute properties

Riboflavin forms fine yellow to orange-yeUow needles with a bitter taste from 2 N acetic acid, alcohol, water, or pyridine. It melts with decomposition at 278—279°C (darkens at ca 240°C). The solubihty of riboflavin in water is 10—13 mg/100 mL at 25—27.5°C, and in absolute ethanol 4.5 mg/100 mL at 27.5°C it is slightly soluble in amyl alcohol, cyclohexanol, benzyl alcohol, amyl acetate, and phenol, but insoluble in ether, chloroform, acetone, and benzene. It is very soluble in dilute alkah, but these solutions are unstable. Various polymorphic crystalline forms of riboflavin exhibit variations in physical properties. In aqueous nicotinamide solution at pH 5, solubihty increases from 0.1 to 2.5% as the nicotinamide concentration increases from 5 to 50% (9). 

Tin trimethyl chloride may be formed from the hydroxide by the action of hydrochloric acid. It has more recently been obtained Irom tin trimethyl solutions by the action of calcium chloride in dry air, and by treating tin trimethyl with mercuric chloride in ethereal solution. It is a liquid having similar properties to the ethyl compound. It forms a compound with 1 mol. of aniline, and with 1 mol. of pyridine, the latter melting at 37 C. By reduction with sodium in liquid ammonia it yields sodium trimethyl stamnide which is a light yellow substance readily decomposing above the temperature of liquid ammonia. It reacts with tin trimethyl halides to give tin trimethyl. The electrical conductivity of tin trimethyl chloride in absolute alcohol at 25 C. has been determined.- ... 

Now according to the present Invention it has been found that hexamethylenetetramine, the well know n condensation product obtained from formaldehyde and ammonia, yields, when suitably treated with concentrated nitric acid, an extraordinarily powerful explosive compound, which combines in itself in an absolutely ideal manner the favourable properties of the ethereal salts of nitric acid and the aromatic nitro compounds. 

Properties White to brownish-yellow crystalline alkaloid. Mp 208C, bp 220C (1-2 mm Hg), sublimes at 180C under reduced pressure. Soluble in fats, fixed oils, absolute alcohol, and ether. Its sulfate and hydrochloride are soluble in water. 

Properties (Pure 100% absolute alcohol, dehydrated) Colorless, limpid, volatile liquid ethereal vinous odor pungent taste. Bp 78.3C, fp -117.3C, refr index 1.3651 (15C), surface tension 22.3 dynes/ cm (20C), viscosity 0.0141 cP (20C), vap press 43 mm Hg (20C), specific heat 0.618 cal/g K (23C), flash p 55F (12.7C), d 0.816 (15.56C), bp 78C, fp -114C, autoign temp 793F (422C). Miscible with water, methanol, ether, chloroform, and acetone. (95% alcohol)... 

Properties Colorless to yellowish liquid pleasant odor. D 0.873, bp 167. Soluble in alcohol and ether insoluble in water and glycerol. Combustible. Derivation Heating absolute alcohol and n-caproic acid in the presence of sulfuric acid, with subsequent distillation. 

Properties Colorless liquid, turning brown on exposure to light. D 1.90-1.93 (25/25C), fp -108C, bp 72C, refr index 1.5168 (15C). Soluble in alcohol and ether slightly soluble in water. Combustible. Derivation By digesting red phosphorus with absolute ethanol, after which iodine is added and the mixture distilled. 

Properties Colorless liquid sweet ester odor. Bp 198C, fp -50C, d 1.055 (25/25C), flash p 200F (93.3C). Insoluble in water soluble in alcohol, ether, chloroform, and benzene. Combustible. Derivation By passing hydrogen chloride into cya-noacetic acid dissolved in absolute alcohol with subsequent distillation. 

Properties Water-white liquid at temperatures below 26.5C faint odor of bitter almonds. Usual commercial material is 96-99% pure. D (Liquid) 0.688 (20/4C), (gas) 0.938 g/L, bp26.5C, fp-13.3C, flash p OF (-17.7C). Soluble in water. The solution is weakly acidic, sensitive to light. When not absolutely pure or stabilized, hydrogen cyanide polymerizes spontaneously with explosive violence. Miscible with water, alcohol, soluble in ether, autoign temp 1000F (537C). 

Properties (I-inositol.) White crystals odorless sweet taste. Mp 224—227C, d 1.524 (dihydrate), 1.752 when anhydrous, dihydrate melts at 215-216C. Soluble in water insoluble in absolute alcohol and ether. Stable to heat, strong acid, and alkali. Amounts are expressed in milligrams of inositol. 

Properties White, crystalline powder. D 4.799, mp 300C (decomposes). Soluble in water and nitric acid insoluble in absolute alcohol, chloroform, ether, carbon disulfide. 

Properties Colorless compressed gas or liquid faintly sweet ethereal odor. D 0.92 (20C), bp -23.7C, fp -97.6C, flash p approximately 32F (0C), refr index 1.3712 (—23.7C), critical temperature 143C, critical pressure 970 psi absolute, autoign temp 1170F (632C), bulk d 7.68 lb/gal (20C). Slightly soluble in water, by which it is decomposed soluble in alcohol, chloroform, benzene, carbon tetrachloride, glacial acetic acid attacks aluminum, magnesium, and zinc. 

Properties White, crystalline, volatile flakes strong coal tar odor. D 1.145 (20/4C), mp 80.2C, bp 217.96C, flash p 176F (80C), sublimes at room temperature, autoign temp 979F (526C). Soluble in benzene, absolute alcohol, and ether insoluble in water. Combustible. 

Properties Red liquid. D 1.816 (20C), fp -28C, bp 154C. Decomposes slowly to vanadium trichloride and chlorine below 63C. Soluble in absolute alcohol and ether. Nonflammable. 

Properties Pink, deliquescent crystals. D 3.0 (18C), decomposes on heating. Soluble in absolute alcohol and ether decomposes in water. 

The structure and absolute configuration of maytansine (72 R = H) has been established by V-ray crystallographic analysis of its 3-bromopropyl ether [72 R = (CH2)3Br]. °° Maytansine represents the first ansa macrolide-type compound that shows in vivo tumour inhibitory properties. ... 

---