CIHM 
 
 Microfiche 
 
 (Monographs) 
 
 ICMH 
 
 Collection de 
 
 microfiches 
 
 (monographies) 
 
 Canadian instituta for Historical Microraproductfons / Institut Canadian da microraproductions historiquM 
 
 ©1998 
 
Technical and Bibliographic Notes / Notes techniques et bibliographiques 
 
 The Institute has attempted to obtain the best original 
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 the images in the reproduction, or which may 
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 checked below. 
 
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LABORATORY 
 
 OF THB 
 
 INLAND REVENUE DEPARTMENT 
 
 OTTAWA. CANADA . 
 
 BULLETIN No. 306 
 
 PEROXIDE OF HYDRCXIEN 
 
 76862—1 
 
LABORATORY 
 
 OK TIIK 
 
 INLAND REVENUE DEPARTMENT 
 
 BULLETIN No 306 
 
 PEROXIDE OF HYDROGEN 
 
 UilAWA, Vvii. 27, lylt). 
 
 J. U. Vincent, Esq., 
 
 Deputy Minister Inland Revenue. 
 
 Sir,— I beg to liand vou a report ..f work done upon thirty-seven (37) suuii.lcs of 
 what is generally called Peroxide of Hvdro-en. The article in question l^ really a solu- 
 tion of the per oxide (H,0,) and is know., .n th- British Pharmacopoe.a as Li.j^wr Hy- 
 dngenii Peroxidi, «nd in the United States Pharmacopoeia as A<jua Hydrogens 
 Dioxidi. 
 
 These solutions are practically identical, ami are l eqiiired to. contain al)out three 
 per cent (3 per cent) of true Hydrof^en Pei-oxide, corresponding to an avadable Oxygen 
 (intent of about ten volumes. 
 
 The British Pharmacopoeia permits a marginal allowance of one per cent avad.ible 
 oxygen in either direction, so that the article meets pharmacopoeal requirements when 
 its available oxygen content lies between nine and eleven volumes (9-11). 
 
 It will be noted that mo.st of the samples examined give results that fall within the 
 specified limits ; whil-t those which indieate a slightly higher strength cannot be held to 
 be in any sense obje, onable for the purposes to which peroxide of hydrogen w usually 
 applied (as an antisep.ic wash, a hair bleach, or as a garf,'le.) Only one sample falls 
 below legal strength, a tact which indicates care in preparation by the manufacture^ 
 and in stora^;« by the dispenser, since this irticle is very prone to decomposition and 
 loss of strent'th. 
 
 It is usual to add a trace of phosphoric acid or of acetanilide, in order to give be^ 
 ter keepin'; propei'ties to the solution. A. elanilide is added in the proportioh of 3/16 
 grain per ounce of solution; and is declareil on the lal)el when pre-sent. 
 
 Since this solution is a pharmacopoeal preparation, it is of course impoesible that 
 it ahould be made proprietary. Two samples (63561 and 635£3) are named as Dxnogen 
 
«„ the label Kxc.-pt thai these sampl- s o.raal., a slightly hiKl>«r peromtof«l»«^i-^ 
 «ytn thin the u!axi,nu,n fix.-d Ky ih.- ,,ha, ...a. „,.....a.s. th.-y 
 
 S.1 peroxide. [ think it „,u.n t.. .,u.-«t>on wi-a -.-r a mune, J-?''"^^ ^Pj^ 
 nosM, is a phaiiniu-opoeal artu le. Mat. ii. lu^ ni i.i. m i r rf^ 
 
 thTwticle, which i. slway. dilated with water. 
 
 I beg to Mcommeod puWioation of this report m BaUetin No. 306. 
 
 I h»we the honour to be. Sir, 
 
 Year obedient aervust, 
 
 MoGILL,