172 



Mr. Perkin on Mauve or Aniline-Purple. [1864. 



a brilliant green metallic lustre. It is moderately soluble in alcohol, but 

 nearly insoluble in ether. It is also, comparatively speaking, moderately 

 soluble in water. 



Different preparations dried at 100° C. gave the following numbers : — 



I. '306 grm. of substance gave '8255 of carbonic acid and '162 of water. 



II. '308 grm. of substance gave '8275 of carbonic acid and '163 of water. 



III. '310 grm. of substance gave '8345 of carbonic acid. 



IV. '3165 grm. of substance gave '851 of carb. acid and '16525 of water. 



V. '2447 grm. of substance gave '6603 of carb. acid and '1356 of water. 



VI. '627 grm. of substance gave '205 of chloride of silver. 



VII. '560 grm. of substance gave "195 of chloride of silver. 



VIII. -69 grm. of substance gave '2266 of chloride of silver. 



Direct Nitrogen determination. 



IX. • 34 9 7 grm. of substance gave 40 c.c. N at20°C. and 777'2mms. Bar. 



40 o r (7772 \7'A^ 



^'=-^^TT¥^-Tr ^=37-2 c. c. at 0° C. and 760millims. Bar. 



815-8 millims. 



37-2 cub. centims. X '0012562 grm. = '04673 grm. N. 

 These numbers correspond to the following percentages : — 



I. II. III. IV. 



Carbon 73'5 73*27 73-4 73-3 



Hydrogen 5'88 5'88 5'8 



Nitrogen 



Chlorine 



V. VI. VII. VIII. IX. 



Carbon 73'59 



Hydrogen 6' 16 



Nitrogen 13'3 



Chlorine 8-08 8 06 8'1 



These numbers agree with the formula C^- H^^ N^ H CI, as may be seen 

 by the following Table : — 



Theory. Mean of experiment. 



C^, 324- 73-5^ 73-41 



H^s 25- 5-67 5-93 



N^ 56- 12-73 13-30 



CI 35-5 8-05 8 07 



440 5 100-00 



I have endeavoured to obtain a second hydrochlorate containing more 

 acid, but up to the present time have not succeeded. 



Platinum-salt. — Mauveine forms a perfectly definite and beautifully 

 crystalline compound with bichloride of platinum. It is obtained by 

 mixing an alcohoHc solution of the above hydrochlorate with an excess of an 



