NH2CO See also:

• NH2CO URETHANE

URETHANE  ,C,H5, the See also:

• ETHYL

ethyl ester of carbamic See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid, is synthesized from See also:

• AMMONIA (NH3)

ammonia and chlorcarbonic ester or diethyl carbonate; by prolonged boiling of See also:

• UREA, or CARBAMIDE, CO(NH2)2

urea with See also:

• ALCOHOL

alcohol (A . W . See also:

• HOFMANN, AUGUST WILHELM VON (1818-1892)
• HOFMANN, JOHANN CHRISTIAN KONRAD VON (1810—1877)
• HOFMANN, MELCHIOR (c. 1498—1543-4)

Hofmann, Ber., 1871, 4, p . 268); by the See also:

• ACTION

action of alcoholic hydrochloric acid on See also:

• CYANOGEN (Gr. ebavos, blue 'yevvav, to produce), C2N2

cyanogen; by the action of alcohol on urea chloride (L . Gattermann, See also:

• ANN

Ann., 1888, 244, p . 40); and by warming alcoholic hydrochloric acid with an alcoholic See also:

• SOLUTION (from Lat. solvere, to loosen, dissolve)

solution of See also:

• POTASSIUM [symbol K (from kalium), atomic weight 39.114 0=16)]

potassium cyanate (0 . Folin, Amer . Chem . Jour., 1897, 19, p . 341) . It crystallizes in large plates, readily soluble in See also:

• WATER

water and melting at 49-50° C . When heated with ammonia to ,8o° C., it gives urea .

See also:

• COLD (in O. Eng. cald and ceald, a word coming ultimately from a root cognate with the Lat. gelu, gelidus, and common in the Teutonic languages, which usually have two distinct forms for the substantive and the adjective, cf. Ger. Kolte, kalt, Dutch koude

Cold alcoholic potash decomposes it into potassium cyanate and alcohol . Nitroso-See also:

• URETHANE, NH2CO

urethane, NO . NH • CO2C2H6, formed by reducing ammonium nitro-urethane with See also:

• ZINC

zinc dust and glacial acetic acid (J . Thiele, Ann., 1895, 288, p . 304), crystallizes in needles which melt at 51–52° C . (with decomposition) .