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iodine

more about iodine

iodine


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Iodine  \I"o*dine\  (?;  104),  n.  [Gr.  ?  violetlike  ?  a  violet  +  ? 
  form:  cf  F.  iode,  iodine.  The  name  was  given  from  the  violet 
  color  of  its  vapor.  See  {Violet},  {Idyl}.]  (Chem.) 
  A  nonmetallic  element,  of  the  halogen  group  occurring  always 
  in  combination,  as  in  the  iodides.  When  isolated  it  is  in  the 
  form  of  dark  gray  metallic  scales,  resembling  plumbago,  soft 
  but  brittle,  and  emitting  a  chlorinelike  odor.  Symbol  I. 
  Atomic  weight  126.5.  If  heated,  iodine  volatilizes  in 
  beautiful  violet  vapors. 
 
  Note:  Iodine  was  formerly  obtained  from  the  ashes  of  seaweed 
  (kelp  or  varec),  but  is  now  also  extracted  from  certain 
  natural  brines.  In  the  free  state,  iodine,  even  in  very 
  minute  quantities,  colors  starch  blue.  Iodine  and  its 
  compounds  are  largely  used  in  medicine  (as  in 
  liniments,  antisyphilitics,  etc.),  in  photography,  in 
  the  preparation  of  aniline  dyes,  and  as  an  indicator  in 
  titration. 
 
  {Iodine  green},  an  artificial  green  dyestuff,  consisting  of 
  an  iodine  derivative  of  rosaniline;  --  called  also  {night 
  green}. 
 
  {Iodine  scarlet},  a  pigment  of  an  intense  scarlet  color, 
  consisting  of  mercuric  iodide. 
 
  {Iodine  yellow},  a  brilliant  yellow  pigment,  consisting  of 
  plumbic  iodide. 
 
  From  WordNet  r  1.6  [wn]: 
 
  iodine 
  n  1:  a  nonmetallic  element  belonging  to  the  halogens;  used 
  especially  in  medicine  and  photography  and  in  dyes; 
  occurs  naturally  only  in  combination  in  small  quantities 
  (as  in  sea  water  or  rocks)  [syn:  {iodin},  {I},  {atomic 
  number  53}] 
  2:  a  solution  of  iodine  in  ethyl  alcohol;  applied  topically  to 
  wounds  as  an  antiseptic  [syn:  {tincture  of  iodine}] 
 
  From  Elements  database  20001107  [elements]: 
 
  iodine 
  Symbol:  I 
  Atomic  number:  53 
  Atomic  weight:  126.904 
  Dark  violet  nonmetallic  element,  belongs  to  group  17  of  the  periodic 
  table.  Insoluble  in  water.  Required  as  a  trace  element  for  living 
  organisms.  One  stable  isotope,  I-127  exists,  in  addition  to  fourteen 
  radioactive  isotopes.  Chemically  the  least  reactive  of  the  halogens,  and 
  the  most  electropositive  metallic  halogen.  Discovered  in  1812  by  Courtois 
 
 




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