DETERIORATION OF CHLORINATED LIME 3 
cans or bottles at intervals. One sample stored in sealed bottles 
showed a loss of 8.2 per cent available chlorine in 11 months and one 
of 10.8 per cent in 12 months. During 11 months one showed an 
8.2 per cent loss when stored in sealed bottles and an 8.4 per cent 
loss when stored in zinc cans. Another sample, originally containing 
37 per cent available chlorine, lost 12.25 per cent from February to 
October when stored in iron (tin-coated) cans. The cans were cor- 
roded at the end of the stcrage period. The fourth sample, containing 
originally 41.9 per cent available chlorine, lost 3.64 per cent when 
held in sealed bottles from April to October. 
Schwarz (10) noticed that the results in a bleachery using about 
» one cask of chlorinated lime a week were irregular, although the pro- 
duct obtained was of good quality. The trouble was traced to de- 
terioration of the chlorinated lime when kept in open packages. 
The material originally testing 34.65 per cent of available chlorine 
lost when carefully covered and protected only 0.2 to 0.3 per cent in 
two weeks; the unprotected product lost 4.61 per cent. 
In 1915 the laboratory of the inland revenue department of Canada 
(5) examined 101 samples of chlorinated lime, each supposed to con- 
tain 30 per cent of available chlorine. Analyzed by the method of 
the British Pharmacopeeia (1914), 21 samples yielded 30 per cent 
available chlorine, 41 samples 25 per cent, 26 samples 20 per cent, 
8 samples 10 per cent, and 5 samples less than 10 per cent. 
Rettie, Smith, and Ritchie (9) state that chlorinated lime loses 
96 per cent of its available chlorine in eight weeks at 37° C. (98.6° F.) 
and in two weeks at 45° C. (113° F.).. By mixing with chlorinated 
lime a quantity of freshiy burnt quicklime from 10 to 15 per cent in 
excess of the quantity calculated to be necessary to react with the 
water present, the keeping qualities are much improved, according 
to these writers. 
Macculloch (6) tested a sample of ‘‘stabilized bleach” (chlorinated 
lime mixed with 20 per cent powdered quicklime) with ordinary 
chlorinated lime for comparison. These tests, which were made in 
India, gave the results shown in Table 2. 
TaBLE 2.—Available chlorine lost in bleaching powder stored for varying periods 
(Macculloch) 
Available chlorine 
In In “‘sta- 
ordinary | bilized’”’ 
bleach bleach 
Time and place of analysis 
Per cent | Per cent 
35. 00 25. 00 
sae Sp bene AR See gS 2 SE ee 5 a ra eS el 
REI RACAL Tes Ol ts rete rs ORT on Dare ieee Ue Sars oer ts ei bet 20. 04 18. 40 
After reaching Madras: ; 
tps Bes Ran heat Ree eee AD Nis BRE PE BG eee Ore es ee ee eee 12552 16. 56 
(eS UBEL LT oo 3S elt BE BES eet EE Ey 2 eee Ear 2 20 Semen Cte fe riers Cen, 68 15. 
aT eS ee ke eres Le Zee eee ot Ne REE Sd ee ae eA AR Ie 42 15. 05 
GT sl Sa ce Ba Soe ee ee ee ee me eee ee nes k tet eee tener meee (eee Ree eee 12. 08 
WEE. J: 2 Sep ee ies eee eee ee Ae eee) eee 10. 00 
2 TiC TR heed CY LS ENG ld 9 RS CRS gE FeO SS ee Sey #0 ., te eee OS OA eR EES 8. 50 
PES we ht es Ce ed Se ae: ee Oe a es oe Se Ce ee ee 3. 48 
Gizolme (2) found that in nine months chlorinated lime kept in 
wooden barrels in a covered shed lost half of its available chlorine. 
_ He concludes that the loss of available chlorine depends on the purity 
i 
and the degree of desiccation of the product. Humid or impure sam- 
ples show a higher rate of deterioration than dry and pure samples. 
