Comparison of Disinfectants 



i8i 



much stir in the medical world until a year or more had passed and 

 a 40 per cent, solution of the gas, under the name of "Formalin," 

 had been placed upon the market. Care must be exercised in 

 handling the fluid, that the hands do not become wet with it, as it 

 hardens the skin and deadens sensation. The vapor is exceedingly 

 irritating to the mucous membrane of the eyes and nose. 



BACTERICIDAL STRENGTH OF COMMON DISINFECTANTS 

 (Adapted from Fliigge, Leipzig, 1902) 



Streptococci 

 and Sta- 

 phylococci 



5 minutes 



Anthrax and Typhoid Bacilli 

 Cholera Spirillum 



S minutes 



2 to 24 hours 



Anthrax Spores 



Acids 



Sulphuric 



Hydrochloric. 

 Sulphurous. . . 



i: 10 

 i: 10 



Sulphurous. 

 Boric 



Alkalies 



Potass, hydrox. . 



Ammon. hydrox. 



Calcium 



Salts 



Copper sulphate. , 



Mercuric chlor. . . 



I -S 



Silver nitrate 



Potass, permang. . . 

 "Calc. chlorid.".. . 

 Halogens and Com- 

 pounds 



Chlorin 



Trichlorid of iodin. 



Organic Compounds 

 Ethyl alcohol .... 



1 : 10,000 to 

 1000 

 i: 1000 

 i: 200 



Acetic and oxalic acids. 

 Carbolic acid 



Lysol 



Creolin 



Salicylic acid 



Formalin (40% for- 

 maldehyd). 

 Peroxid of hydrogen 



1% 

 i: 200 



70%— IS 

 minutes 



1:60 



1:300 



I : 1000 

 i: 10 



Cone. 



c: 100 

 i: 100 



1:1500 



1:1500 

 Typhoid 



i: 700 

 1:300 (Gas 

 10 vol. %) 



1:30 



I :3oo 

 1:300 

 I : 1000 



1 : 10,000 

 I : 4000 



1:500 



1% 

 I : 1000 



70%— 10 

 minutes 



Cholera 

 i: 200 



Typh. 1:50 

 1:300 

 i: 100 



i: 20 



i: 200 



1 : 200 to 300 



1:300 



I : 3000 

 I : 1000 

 1:500 



I : so in 10 days 

 1:50 in 10 days 



Cone. sol. in- 

 complete disin- 

 fection. 



1 : 20 (s days) 

 i: 2000(26 hrs.) 



1 : 20 (i day) 

 i: 20 (i hr.) 



2% (in I hr.) 

 1:1000 (in 12 

 hours) 



Alcol. 50% for 4 

 months with- 

 out kill i n g 

 spores (Koch*) 



1 : 20 (4 to 45 

 days) (at 40° 



in 3 hours) 



(10% in s hrs.) 



i: 20 (in 6 hrs.) 



1:100 (in I hr.) 

 3: 100 (in I hr.) 



The solution can be employed to spray the walls and floors of 

 * Koch, Arb. a. d. kais. Gesundheitsamt, 1881, 1. 



