274 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS TABLE 4--INHIBITION OF ACID PKODUCTION OF SALIVAK¾ SEDIMENT BY AMINES A. Recoveries less than 20 per cent Alkyl diethylene triamine .......................................... s/10 o-Aminobicyclohexyl .............................................. 1.0 pg Decylamine ...................................................... s/10 N-Decylpiperazine ................................................ 0.1 Di [1-(3 ethylamyl)-(4-ethyloctyl) ] ethylenediamine .................... s/10 2,5-Dimethyl-N-nonyl piperazine .................................... s/10 N-Diphenylpropene-2, N•-methyl piperazine hydrochloride ............. s/10 N,n, Dodecylpiperazine ............................................ s/10 N-Fluorene piperazine dihydrochloride ............................... s/10 Gentian violet .................................................... 0.1 pg N-n-Heptylpiperazine .............................................. s/10 (1-Hydroxyethyl-2-glyoxalidinyl) (2-e thylhexoxymethyl) me thane ........ 1.0 N-(1-Naphthyl, 1-phenylmethyl)-N'-methylpiperazine hydrochloride .... s/10 N-Octyl piperazine ................................................ 0.1 2,4,6-Tri(dibutyl-aminomethyl) phenol ............................... s/10 pg B. Recoveries from 20 to 39 per cent N-(2-Aminoisobutyl) aniline ........................................ 1.0 pg 4-Amino-2-methylq3-hexanol ........................................ s/2 pg N(3-Aminopropyl) rosin amine D diacetate ........................... 1.0 5-Amino-2,2,5-trimethyl-3-aza-l-hexanol ............................. 1.0 pg Ortho anilinophenol ............................................... s/2 pg Dibutylammonium lactate ......................................... 1.0 pg Didodecylamine .................................................. s/2 pg a-Methyl-benzylamine ............................................... 1.0 Di(4-ethyl-l-methylhexyl) ethylenediamine ........................... s/10 N,N-Dime thyl-dodecylamine ...................................... 0.1 N-Diphenylmethyl-N•-methyl piperazine HCI ........................ s/10 Dodecylamine .................................................... s/10 2-Ethylhexylethylenediamine ....................................... 0.1 4-Ethyl 2-isobutyl octyl diethanolamine .............................. s/2 pg 1,•-Oxyethyl 2A8 hepta decenyl imidazoline .......................... 1.0 pg 1,/%Oxyethyl 2--heptadecyl imidazoline ............................... s/2 pg 1,t•-Oxyethyl 2-undecyl imidazoline .................................. 1.0 pg •0-Phenetidine ..................................................... s/10 C. Recoveries from 40 to 59 per cent Nq(2-Aminoisobutyl) isopropylamine ................................ 1.0 pg 5-Amino-5-methyl-l,3-dioxane ...................................... 1.0 pg N-Benzylcyclohexylamine .......................................... s/10 Furfurylamine .................................................... 1.0 pg Methyl anthranilate ............................................... s/10 2-(Alpha-methylbenzylamino) ethanol ................................ s/2 pg Phenylethanolamine ............................................... 1.0 pg Rosin amine D acetate ............................................ 1.0 Rosin amine D hydrochloride ....................................... s/2 Soy dimethyl amine ............................................... s/2 pg D. Recoveries from 60 to 79 per cent 2-Amino-2-methyl-1-propanol ....................................... 0.1 Benzyldiethanolamine ............................................. 1.0 4, Butyl(5 or 6) methyl morpholine .................................. 1.0 n-Butyl oxamate ................................................. s/10 Cetyl diethanolamine hydrochloride ................................. 0.1 2,6-Di(dibutylaminomethyl) 3,5 dimethylphenol ...................... s/2 pg Diethanolamine ................................................... 0.1 1,3-Bis(dimethylamino)-2-propylamine ............................... 1.0 pg 2,6-Dimethyl-4-dodecylmorpholine ................................... s/10 N-Diphenylmethyl, N•-(2-hydroxyethyl) piperazine dihydrochloride ..... ' s/10 N,N-Dime thyl-1,3-propanediami ne .................................. 1.0 a'-Dipyridyl .................................................... 0.1 odecylamine-N-glucoside ......................................... s/10 N-Dodecyl-morpholine ............................................. s/10 N-Dodecyl-pyrrolidine ............................................. 1.0 Ethomeen S/12 ................................................. 0.1

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