POISONS : THEIR EFFECTS AND DETECTION. 
[§ 743 - 
8. Arsenical compounds used in pyrotechny :— 
Blue fires—(1) Realgar .... 
Parts. 
2 
Charcoal .... 
3 
Potassic chlorate 
5 
Sulphur .... 
. 13 
Nitrate of baryta 
. 77 
(2) Sulphur .... 
, 40-9 
Nitre„. .... 
. 36-8 
Sulphide of antimony 
2-3 
,, arsenic 
5 
Charcoal .... 
5 
Green fires—Metallic arsenic . 
2 
Charcoal .... 
3 
Chlorate of potash 
5 
Sulphur .... 
13 
Nitrate of baryta 
7 
ght green fire—Charcoal .... 
1-75 
Sulphide of arsenic 
1-75 
Sulphur .... 
10-50 
Chlorate of potash 
. 23-25 
Nitrate of baryta 
. 62-50 
White fire—(1) Arsenious acid . 
•76 
Charcoal .... 
1-63 
Sulphide of antimony 
. 12-27 
Nitrate, of potash 
. 36-59 
Sulphur ... 
. 48-75 
(2) Realgar .... 
6-1 
Sulphur .... 
21-2 
Nitrate of potash 
. 72-7 
§ 743. Organic Preparations of Arsenic. —The chief organo-arsenical 
compounds used are four—salvarsan, neo-salvarsan, galyl, and luargol ; 
the best effect is produced by intravenous injection. 
Salvarsan (synonyms: kharsivan, arseno-billon, arseno-benzol).— 
It is the hydrochloride of 3 : 3'-diamino-4 : 4'-dihydroxyarseno-benzene : 
nh 2 nh 2 
^>As : As 
The base is a pale yellow powder soluble in dilute hydrochloric acid, or 
solutions of NaOH, or sodium carbonate ; it is precipitated from alkaline 
solutions by acetic acid. 
The salt (hydrochloride) is easily soluble in water, methyl alcohol, or 
glycerine ; only slightly soluble in glacial acetic acid, acetone, ether, or 
concentrated hydrochloric acid. The aqueous solution is acid to litmus. 
< > 0H 
