CHI3 See also:

• CHI3 IODOFORM

IODOFORM  , a valuable antiseptic discovered by G . S . Serullas in 1822; in 1834 J . B . See also:

• DUMAS, ALEXANDRE
• DUMAS, ALEXANDRE [" DUMAS FILS"] (1824-1895)
• DUMAS, GUILLAUME MATHIEU, COUNT (1753-1837)
• DUMAS, JEAN BAPTISTE ANDRE (1800-1884)

Dumas showed than it contained See also:

• HYDROGEN [symbol H, atomic weight x-oo8 (0=16)]

hydrogen . It is formed by the See also:

• ACTION

action of See also:

• IODINE (symbol I, atomic weight '26.92)

iodine and aqueous potash on See also:

• ETHYL

ethyl See also:

• ALCOHOL

alcohol, See also:

• ACETONE, or DIMETHYL KETONE

acetone, acetaldehyde and from most compounds containing the grouping See also:

• CH3

CH3•CO•C– . Its formation from alcohol may be represented thus: C2H5OH+ 412+6KHO= CHI3+KHCO2+5KI+5H20 . It crystallizes in yellow hexagonal plates, melting at 119-1200 C., and is readily soluble in alcohol and See also:

• ETHER, (C2H5)2O

ether, but is insoluble in See also:

• WATER

water . It has a characteristic odour and is volatile in See also:

• STEAM
• STEAM (0. Eng. steam, vapour, smoke, cf. Du. steam; the origin is unknown)

steam . On reduction with hydriodic See also:

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

acid, it yields methylene iodide, CH2I2 . More recently, See also:

• IODOFORM, CHI3

iodoform has been prepared by the See also:

• ELECTROLYSIS (formed from Gr. Xbety, to loosen)

electrolysis of a 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 iodide in the presence of alcohol or acetone, the electrolytic See also:

• CELL (from Lat. cella, probably from an Indo-European kal —seen in Lat. celare, to hide; another suggestion connects the word with Lat. cera, wax, taking the original meaning to refer to the honeycomb)

cell being fitted with a See also:

• DIAPHRAGM (Gr. Scat/pay,aa, a partition)

diaphragm, in See also:

• ORDER
• ORDER (through Fr. ordre, for earlier ordene, from Lat. ordo, ordinis, rank, service, arrangement; the ultimate source is generally taken to be the root seen in Lat. oriri, rise, arise, begin; cf. " origin ")
• ORDER, HOLY

order to prevent the hydrogen which is formed at the same See also:

• TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
• TIME, MEASUREMENT OF
• TIME, STANDARD

time from reducing the iodoform, or from combining with the iodine to See also:

• FORM (Lat. forma)

form hydriodic acid . K .

See also:

• ELLIS (originally SHARPE), ALEXANDER JOHN (1814-189o)
• ELLIS, GEORGE (1753-1815)
• ELLIS, ROBINSON (1834- )
• ELLIS, SIR HENRY (1777-1869)
• ELLIS, WILLIAM (1794 – 1872)

Ellis uses a solution of potassium iodide and See also:

• SODIUM [symbol Na, from Lat. natrium; atomic weight 23.00 (0=16)]

sodium carbonate in water, which with the necessary alcohol is contained in a porous cell fitted with a See also:

• LEAD
• LEAD (pronounced iced)

lead anode, whilst the See also:

• CATHODE

cathode compartment contains a solution of See also:

• CAUSTIC (Gr. rcavvraubs, burning)

caustic soda and a See also:

• NICKEL
• NICKEL (symbol Ni, atomic weight 58.68 (0=16))

nickel electrode . The electrolysis is carried out at a temperature of 7o° C., and a current See also:

• DENSITY (Lat. densus, thick)

density of one See also:

• AMPERE, ANDRE MARIE (1775–1836)
• AMPERE, JEAN JACQUES (1800-1864)

ampere per square decimetre is used . At the end of three See also:

• HOURS, CANONICAL

hours a yield of 7o 04, of the theoretical quantity is obtained .