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MISCELLANEOUS TABLES 605
TABLE OF CHEMICAL SOLUBILITIES
THE following table will serve as a guide when preparing stock solutions of photographic chemicals. As a solution is likely to become cooled in winter to a temperature approximately 40° F., it is not advisable to prepare a stock solution stronger than is indicated by the solubility of the chemical at this temperature.
Ounces of chemical in 100 ozs. Substance (fluid) of saturated solution at
40° F. 70° F.
(4.4° C.) (21.1° C.)
Acid, acetic (any strength) mixes in all proportions
Acid, citric - 75,. "„
Acid, oxalic 'V* IZ'1
Acid, tartaric (dextro) — -■- 73
Acrol or amidol (see diaminophenol hydrochloride)
Alum, ammonium "/* '2
Alum, iron 4° J»
Alum, potassium b (* llQ
Alum, potassium chrome * ' /2 *"/2
Amidol or acrol (sec diaminophenol hydrochloride)
Ammonia solution _ m,xcs in a11 Proportion*
Ammonium bromide Ammonium carbonate
52 57
26 31
Ammonium chloride
... ______„ 26 30
Ammonium iodide \ v 51/
Ammonium oxalate *• /+ ^
Ammonium persulphate 5 2 62
Ammonium thiocyanate or ammonium sulphocyanidc 62 73
Ammonium thiosulphate. anhydrous 83 88
Borax (sodium tetroborate) IVi 7lA
Caustic potash (see potassium hydroxide)
Copper sulphate, crystal 26 31
Diaminophenol hydrochloride (acrol or amidol) 20 Yi 26
Elon (monomethyl para-amino phenol sulphate)
Ferrous sulphate 5J4 8*4
Formalin 29 41
Hydroquinone mixes in all proportions
Hypo (see sodium thiosulphate) 4J4 6%
Kodelon (see para-aminophenol oxalate)
Lead acetate 3 1 4 7
Mercuric chloride 4 6%
Para-aminophenol oxalate (kodelon) 1J4 2 J/2
Potassium bichromate 6% \*Vi
Potassium bromide 5 0 5 6
Potassium carbonate, anhydrous 83 8 5
Potassium chloride 26 3 1
Potassium citrate 9 3 104
Potassium cyanide ._ 46 5 2
Potassium ferricyanide 3 0 3 6
Potassium ferrocyanide \7Vi 26
Potassium hydroxide (caustic potash) 78 8 3
Potassium iodide 99 104
Potassium metabisulphate 47 5 7
Potassium oxalate 29 3 6!/2
Potassium permanganate . 3J4 &%
Pyrogallol (pyro) 3 6 5 7
Silver nitrate ...109 1 3 5
Sodium acetate, anhydrous 31 36
Sodium acetate, crystal (trihydrate) 5 2 6 2
Sodium bicarbonate 7% 9|4
Sodium bisulphate 5 2 5 2
Sodium bromide — 67 73
Sodium carbonate, anhydrous 10J4 24
Sodium carbonate, crystal 29 6 5
Sodium chloride 31 3 1
Sodium hydroxide (caustic soda) 50 8 3
Sodium phosphate, dibasic crystal 6Vz 24
Sodium sulphate, anhydrous 5 14 I^Vz
Sodium sulphate, crystal 10*4 41
Sodium sulphide, fused 13J4 MVt,
Sodium sulphide, crystal 3 6*4 47
Sodium sulphite, anhydrous \7Vi 28
Sodium tetraborate (see borax)
Sodium thiosulphate, (hypo) crystal — 73 93
Uranyl (uranium) nitrate . 114 130