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MISCELLANEOUS TAHLES 391
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 . "8 88
Acid, oxalic _ M1:
Acid, tartaric (dextro) . — 73 78
Acrol or amidol (see diaminophenol hydrochio.ide)
Alum, ammonium ... 6'4 1 5 ! i
Alum, iron __ 48 59
Alum, potassium 6% 1 1 !4
Alum, potassium chrome .._ _ 1 5 J/? 20Vi
Amidol or acrol (see diaminophenol hydrochloride)
Ammonia solution mixes in all proportions
Ammonium bromide 5 2 5 7
Ammonium carbonate _ 26 3 1
Ammonium chloride 26 3 0
Ammonium iodide 104 109
Ammonium oxalate _ 1\\ 5}4
Ammonium persulphate — 52 62
Ammonium thiocyanate or ammonium sulphocyanide 6 2 7 3
Ammonium thiosulphate, anhydrous 8 3 8 8
Borax (sodium tetroborate) 2lA TVa
Caustic potash (see potassium hydroxide)
Copper sulphate, crystal 26 3 1
Diaminophenol hydrochloride (acrol or amidol) 20H 26
Elon (monomethyl para-amino phenol sulphate) _.
Ferrous sulphate 5% 8',4
Formalin 29 41
Hydroquinone — „ mixes in all proportions
Hypo (see sodium thiosulphate) — 4J4 6'-t
Kodelon (see para-aminophenol oxalate)
Lead acetate 3 1 47
Mercuric chloride .— 4 6'4
Para-aminophenol oxalate (kodelon) 1 !4
Potassium bichromate _ _ 6% 14>>
Potassium bromide 50 56
Potassium carbonate, anhydrous _ _. 83 85
Potassium chloride ^ 26 31
Potassium citrate 93 104
Potassium cyanide _ 46 52
Potassium ferricyanide 30 36
Potassium ferrocyanide 1 7 J, ^ 26
Potassium hydroxide (caustic potash) 78 83
Potassium iodide ._ ...... 99 104
Potassium metabisulphate 47 57
Potassium oxalate _ 29 3 6 ' 2
Potassium permanganate 3 14 6 '4
Pyrogallol (pyro) _ 36' 57
Silver nitrate 109 135
Sodium acetate, anhydrous _. 3 1 36
Sodium acetate, crystal (trihydrate) 52 62
Sodium bicarbonate 7 \4 9\4
Sodium bisulphatc ... 5 2 5 2
Sodium bromide _ 67 73
Sodium carbonate, anhydrous 1 0 ' ^ 24
Sodium carbonate, crystal 29 65
Sodium chloride _ 31 3 1
Sodium hydroxide (caustic soda) _ 50 83
Sodium phosphate, dibasic crystal 6J4 24
Sodium sulphate, anhydrous 514 ZOJ^
Sodium sulphate, crystal _ 10^J 41
Sodium sulphide, fused 1 3 }■£ 1731
Sodium sulphide, crystal 36J4 47'
Sodium sulphite, anhydrous \7Vz 28
Sodium tetraborate (sec borax)
Sodium thiosulphate, (hypo) crystal ... 73 93
Uranyl (uranium) nitrate 1M 130