Benzidine dihydrochloride

The submitters used benzidine obtained by neutralization of an aqueous solution of c.p. benzidine dihydrochloride (Mathe-son, Coleman and Bell) with 20% sodium hydroxide solution, followed by crystallization from 60-70% ethanol. The benzidine prepared in this manner was in the form of light tan flakes. Freshly prepared benzidine should be used for the best results. [Pg.22]

A mixture of 280 g. (1.52 moles) of commercial benzidine and 880 cc. (10.23 moles) of concentrated hydrochloric acid (sp. gr. 1.182) is placed in a 5-I. round-bottomed flask and wanned on a steam bath for one to two hours, with occasional shaking, to form the dihydrochloride. The flask is then equipped with a mechanical stirrer and a dropping funnel, and cooled, with stirring, to — ro° in an ice-salt bath. When this temperature has been reached, the benzidine dihydrochloride is tetrazotized over a period of two hours with a solution of 232 g. (3.19 moles) of 95 per cent sodium nitrite in 800 cc. of water, until a faint test for nitrous acid with starch-iodide paper is obtained after twenty minutes. During this reaction, the temperature is kept below —5 °. [Pg.20]

Benzidine, N,N -diethyl-, 36, 21 Benzidine dihydrochloride, 36, 22 Bcnzil, 34, 42 Benzil dihydrazone, 34, 42 Benzilic acid, 33, 37 2-Benzimidazolethiol, 30, 56 l,2-Benzo-3,4-dihydrocarbazole, 30, 91 Benzofuran, 3-methyl, 33, 43 Benzofurazan oxide, 31,14, 15 37,1 Benzoguanamine, 33,13 Benzoic acid, 32, 94 37, 21 Benzoic acid, -acetyl-, methyl ester, 32, 81... [Pg.45]

Benzidine dihydrochloride [531-85-1] M 257.2. Crystd by soln in hot H2O, with addition of cone HCl to the slightly cooled soln. CARCINOGENIC. [Pg.101]

Dibromo-l-propanol, phosphate (3 1) /)-Dichlorobenzene 3,3 -Dichloro-/i-benzidine 3,3 -Dichloro-/ -benzidine dihydrochloride... [Pg.2419]

Benzidine, 3,3 -dichloro-, dihydrochloride. See 3,3 -Dichlorobenzidine dihydrochloride Benzidine dihydrochloride CAS 531-85-1 EINECS/ELINCS 208-519-6 Synonyms Benzidine hydrochloride (1,1 -Biphenyl)-4,4 -diamine, dihydrochloride Empihcal C12H12N2 2HCI Formula H2NC6H4C6H4NH2 2HCI Properties Wh. cryst. powd. sol. in alcohol sol. 5-10 mg/ml in DMSO sol. 1-5 mg/ml in water sol. <... [Pg.438]

Benzldine-2,2 -disulfonic acid. See 2,2 -Benzidinedisulfonic acid Benzidine hydrochloride. See Benzidine dihydrochloride... [Pg.439]

Acrylates/VA copolymer Adipic acid Albumen Alkyl phenol disulfide Ami noethyl piperazine Ammonium lignosulfonate Ammonium perchlorate Ammonium polyacrylate Ammonium thiocyanate Ammonium zirconium carbonate Beeswax Benzidine dihydrochloride N-Benzyldimethylamine Boron trifluoride 1,3-Butanediol dimethacrylate Butyl acetoxystearate Butyl lactate t-Butyl methacrylate Calcium naphthenate p-Carboxyethyi acryiate... [Pg.4793]

Calcium sulfate hemihydrate blood clotting aid Vitamin K blood detection Benzidine dihydrochloride blood plasma expander PVP... [Pg.4915]

Magnesium sulfate anhydrous detergent determination Benzidine dihydrochloride detergent industry Cumene sulfonic acid detergent ingredient... [Pg.5072]

Benzidine dihydrochloride hardener, PWB laminates 4,4 -Diaminodiphenyl sulfone hardener, resins... [Pg.5360]

Benzidine dihydrochloride 4,4 -Methylenebis (2-chloraniline) Phenolic resin hardener, steel Calcium cyanamide hardener, textiles Epoxy cresol novolac hardener, tissue Zinc PCA... [Pg.5360]

Anthracene Anthranilic acid Anthraquinone Antimony pentachloride Benzaldehyde Benzidine dihydrochloride 2,2 -Benzidinedisulfonic acid Benzoguanamine Benzotrifluoride Benzoyl chloride N-Benzylamine N-Benzyl-N-ethyl-m-toluidine Bisphenol A Bromine 4-Bromochloro benzene Butyl acetoacetate n-Butylamine t-Butylamine Ceteareth-15 o-Chloroaniline p-Chloroaniline m-Chlorobenzoic acid o-Chlorobenzoic acid p-Chlorobenzoic acid m-Chlorobenzotrifluoride o-Chlorobenzotrifluoride p-Chlorobenzotrifluoride Chloroform 4-Chloro-2-nitroaniline 2-Chloronitrobenzene... [Pg.5395]

Phosphorus, yellow metal analysis Benzidine dihydrochloride metal auxiliary... [Pg.5460]

PCB substitute dielec, fluids, electrical capacitors s-Dioctyl phthalate p-cresol detection Benzidine dihydrochloride PE film additive Erucic acid... [Pg.5507]

Acenaphthene n-Amyl alcohol Arachidic acid Arachidyl alcohol Benzidine dihydrochloride 2-Butyl octanoic acid Butyloctanol Calcium sulfate Cetylarachidol Cocamine Cocopropylenediamine Cyclodextrin p-Cyclodextrin 1,10-Decanediol 2-Decyl tetradecanoic acid Dihydroxyethyl cocamine oxide Dodecylhexadecanol 2-Hexyl decanoic acid Hydroxypropyl-o-cyclodextrin Hydroxypropyl-P-cyclodextrin Hydroxypropyl-y-cyclodextrin 12-Hydroxystearyl alcohol Isobutyl oleate Kelp Lead phthalate, basic Methoxyethanol 2-Methoxy-5-nitroaniline Methoxy tripropylene glycol acrylate Methylene chloride 2-Octyl dodecanoic acid Oleamine PEG-25 castor oil PEG-30 castor oil PEG-36 castor oil PEG-40 castor oil PEG-200 castor oil PEG-5 hydrogenated castor oil PEG-25 hydrogenated castor oil Polyamide Polysorbate 85 Pyridine Quartz Sodium isopropyl naphthalene sulfonate Soybean (Glycine soja) meal Sucrose Sulfur Tallow amine N-Tallow-1,3-diaminopropane dioleate p-Toluene sulfonic acid Tri methyl amine Tungstic acid Undecylenic acid Vinyl compounds and polymers plastics additive... [Pg.5551]

Ammoniacal copper sulfate Anthracene Cadmium chloride Potassium ferricyanide printing, cellulosic textiles p-Phenylenediamine dihydrochloride printing, plasticized fabrics 2-Hexanone printing, security Benzidine dihydrochloride printing, textile industrial Propylene glycol alginate printing, textiles... [Pg.5573]

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