ENZYME INHIBITORS FOR DENTIFRICES 275 E. TABLE 4 (Continued) Ethomeen S/15 .................................................. 0.1 N-Heptyldiethanolamine .......................................... 1.0 Homoveratrylamine ............................................... 1.0 1,1'-(2-Hydroxy-ethylimino)di-2-propanol ............................ 0.1 pg 3-Meth¾1-3-pyridol ................................................ s/2 pg Octadecyl amine acetate .......................................... s/10 Phenyldiethanolamine ............................................. s/2 pg •8-Phenylisopropylamine sulfate ..................................... 1.0 pg Triethylenetetramine ............................................. 1.0 Triamine T acetate .............................................. s/2 pg Recoveries from 80 to 99 per cent Acetaldehyde ammonia ............................................ 0.1 Alkyl diethylene triamine .......................................... s/10 2-Amino-l-butanol ................................................ 0.1 2-Amino-2-ethyl-l,3-propanediol .................................... 0.5 2-Aminophenol ................................................... 0.1 /5-n-Amylaminoethanol ............................................. 0.1 Azlactone of t•-benzoylamino-g-(3,4-dimethoxyphenyl) acrylic acid ...... s/10 N-Benzyl-N'-ethylpiperazine dihydrochloride ......................... 0.1 4-Butyl (5 or 6) methyl-2,3 dihydro 1,4-oxazine ....................... 0.1 Carbazole ........................................................ s/2 pg 1-Cyclohexylamino-2-propanol ...................................... s/10 B-Di-n-amylaminoethano! .......................................... 0.1 Dicyclohexylamine ................................................ 0.1 Dicyclohexyl ammonium benzoate ................................... s/10 N•N'-Di-(diethylaminopropyl) piperazine tetrahydrochloride ............ 0.1 Didodeeylamine ................................................... s/10 pg Diethanoi amyl amine ............................................. 0.1 1,3-Di(2 ethyl hexyl)-2-(1-ethylamyl) tetrahydro imidazole ............. s/10 Diisobutylamine .................................................. 1.0 Diisopropanolamine ............................................... 0.1 Diisopropylamine ................................................. 0.1 Dipropylamine ................................................... 1.0 N,N-Diethyl-l,3-propanediamine .................................... 1.0 N,N-Dimethyloctadecylamine ...................................... 0.1 3-Dimethylaminopropylamine ...................................... 1.0 pg Diphenylamine ................................................... s/2 pg Di-beta-phenethylamine ........................................... s/10 Dibutylamine .................................................... 1.0 Dodecylurea N-glucoside ........................................... s/10 Furfurylamine .................................................... 0.1 D (+) glueosamine HCl ........................................... 0.1 Guanidine acetate ................................................. 0.1 Hexadecylamine .................................................... s/10 Histamine base ................................................... 0.1 Histamine diphosphate ............................................ 0.1 Hydrofuramide ................................................... s/2 pg Tris (hydroxymethyl) aminomethane ................................ 1.0 4-0,-Hydroxypropyl) pyridine ...................................... s/2 3-Isopropoxypropylamine .......................................... 1.0 Isoquinoline-l-NH (CH2)•N(C2Hs)2-5-OCHa .......................... 0.1 2-Methoxy-4-Hydroxy-7-methoxyquinoline ........................... 0.1 1 (Alpha-methylbenzyl) 2 undecyl glyoxalidine ....................... s/2 pg N-Methyl piperazine .............................................. 0.1 Monoethanolamine ................................................ 0.1 Naphthapiperazine ................................................ 0.1 p-Nitraniline ..................................................... s/10 N-Octadecylamine ......................................... ß ....... s/10 N-Octadecylmorpholine ............................................ s/10 B-Octyl-2-aminoethanol ............................................ 0.1 N-Phenyldiethanolamine .......................................... 0:1 pg 2,2'-(Phenylimino) diethanoi ........................................ 1.0 pg N-Phenyl morpholine .............................................. s/10 Piperazine hydrate ................... ,., ............................. 0.1

276 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS TaBt, E 4 (Continued) Tetradecylamine .................................................. s/10 Tetraethylene pentamine ........................................... 1.0 1,2,3,4-Tetrahydrocarbazole ........................................ s/10 N,N'-Tetrahydroxypropyl ethylene diamine .......................... 0.1 1-Phenyl-5~[1-methylamine-ethyl] tetrazole ........................... 0.1 Triallyl cyanurate ................................................. s/10 2,4,6-Tri (di(2-ethylhexyl) aminomethyl) phenol ....................... s/2 pg 2,4,6-Tri (dimethylaminomethyl) phenol ............................. 1.0 pg Recoveries over 100 per cent Alkyl pyridines HB ............................................... s/10 2-Amino-2-methyl-1, 3-propanediol .................................. 0.1 4-Aminophenol ................................................... 0.1 P-Aminophenyl phosphoric acid ..................................... s/10 3-Amino-propanol ................................................. 0.1 2-Aminopyridine .................................................. s/10 Amyl cyclohexyl ammonium oleate .................................. 0.1 1-(0-Anisyl)-3-diethylamino-2-propanol HCl .......................... 0.01 Benzylamine ...................................................... 1.0 Benzylidene quinaldine ............................................ 0.1 N-Butylamine .................................................... 0.1 4-Butyl (5 or 6) methylpiperazine ................................... 0.1 Cyclohexylaminoethanol ........................................... 0.1 1-Cyclohexylamino-2-propanol ...................................... 0.1 pg 3,5-Dicarbethoxy-2,6-dimethyl-4-propyl-l,4 dihydropyridine ............ s/10 Diethylamine ..................................................... 1.0 B-Diethylaminoethanol ............................................ 0.1 B-Diethylamino propylamine ....................................... 1.0 Diethyl N,N'-ethylene di(B-amino-crotonate) ........................ s/10 6,7-Dimethoxy-l,2,3,4-tetrahydro isoquinoline ........................ 0.02 N,N-Dimethylhexadecylamine ...................................... s/10 2,6-Dimethyl-4-octadecyl-morpholine ................................ 0.1 Di (2,5-dimethyl pyrryl) ethane ..................................... s/10 Ethanol amine .................................................... 0.1 Di (2-ethylhexyl) ethylenediamine ................................... 0.1 Dioctadecylamine ................................................. s/10 N-Diphenylmethyl, N'-ip-ethoxybenzyl piperazine ..................... s/10 2-(l-E thylamyl)-3-(2-etnylhexyl) oxazolidine .......................... s/10 Ethylenediamine q- 50 M propylene oxide q- 200 M ethylene oxide ..... 0.1 Ethylenediamine q- 100 M propylene oxide q- 100 M ethylene oxide .... 0.1 1-(2-Ethylhexyl)-2-heptadecyl glyoxalidine ........................... s/10 N-Fluorene-N'-methyl piperazine dihydrobromide ..................... 0.1 2 Hepta decyl-l-(hydroxyethyl)-l,4,5,6-tetrahydropyrimidine ........... s/10 1,6-Hexanediamine ................................................ 1.0 3,3' Iminobispropylamine .......................................... 1.0 B-Isobutylaminoethanol ........................................... 0.1 N-Isobu tyldiethanolamine .......................................... 1.0 3-Methoxypropylamine ............................................ 1.0 N-Methyldiethanolamine .......................................... 1.0 1-Methyl 2,2-di(methoxyethoxy) ethylamine .......................... s/2 pg 4,4'-(Methylene-dioxydiethyl) di-morpholine ......................... 0.1 Monocaine formate ................................................ 0.1 Monoisopropanolamine ............................................ 0.1 N,N'-Di (4-morphylpropyl)-piperazine ............................... 0.1 Nicotine sulfate solution 40% ...................................... s/10 N-Octadecyl pyrrolidine ........................................... s/10 2-Phenylbenzoxazole .............................................. 0.1 Phenyl biguanide hydrochloride ..................................... 0.1 N-Phenyl-N'-methylpiperazine maleic acid salt ....................... 0.1 4-Phenylsemicarbazide HCl ......................................... s/10 Rosin amine D plus two moles ethylene oxide ........................ s/2 Tallow amine ..................................................... s/10 N,N,N',N'-Tetra butylmethylene diamine ........................... 1.0 Triisopropanol amine ........................................... 0.1