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Bone Char (Granular) / Bone Black from READE PDF Print E-mail


  • Bone Char (Granular) Synonyms:

Bone char, bone black, ivory black, animal bone charcoal, animal charcoal, bone charcoal, bone ash, abaiser, bone black #6; bone charcoal; C.I., pigment black 9, CAS# 98615-67-9

  • Bone Char (Granular) Possible Designations:

a) Chemical Name: Tricalcium phosphate

b) Chemical Formula: C=(~12%) CA3(PO4)2= (~ 88%)

c) [Ca10(PO4)6(OH)2]

  • Bone Char (Granular) Description:

a) Bone char is a granular material produced by charring animal bones: the bones are heated to high temperatures (in the range of 400 to 500 °C) in an oxygen-depleted atmosphere to control the quality of the product as related to its adsorption capacity for applications such as defluoridation of water and removal of heavy metals from aqueous solutions.

b) The quality of the bone char can be easily determined by its color.

c) Black charcoals are usually undercharred bones that still contain organic impurities which may impart undesired odor and color to treated waters.

d) White bone chars are overcharred bones that present low fluoride removal capacity.

e) Grey-brownish bone char are the best quality chars for adsorption applications.

f) The quality of the bone chars is usually controlled by the amount of oxygen present in the charring atmosphere. It consists mainly of calcium phosphate and a small amount of carbon.

g) Bone chars usually have lower surface area than activated carbons, but presents high adsorptive capacities for copper, zinc, and cadmium

  • Bone Char (Granular) Nominal Chemical Composition (%):

a) Carbon Content=  9 -11%

b) Acid Soluble Ash= 3% max.

c) Tricalcium Phosphate= 70 - 76%

d) Calcium Carbonate= 7 - 9%

e) Calcium Sulfate= 0.1 - 0.2%

f) Iron= <0.3%

  • Bone Char (Granular) Standard Grades Available:

a) 4 x 6 mesh

b) 20 x 60 mesh

  • Bone Char (Granular) Nominal Physical Constants:


insoluble in cold, hot water

Bulk Density (lbs/ft3)

40 - 45

Pore Size Distribution

7.5 - 60,000 nm

Total Surface Area


Pore Volume


Moisture (as packed)

5% max.

Conditions Of Instability 

excess heat

Mohs Hardness @20°C


Average Specific Gravity (g/cc)




DOT Classification 

not classified


powdered solid



  • Bone Char (Granular) Typical Applications:

a) Filtration media.  Bone char is used to remove fluoride from water and to filter aquarium water.

b) It is often used in the sugar refining industry for decolorizing a process patented by Louis Constant in 1812). This is a concern for vegans and vegetarians, since about a quarter of the sugar in the US is processed using bone char as a filter (about half of all sugar from sugar cane is processed with bone char, the rest with activated carbon). As bone char does not get into the sugar, sugar processed this way is considered parve/Kosher.[citation needed] Sugar processed in Australia does not use bone char. In Canada, Lantic (owner of the Rogers and Lantic Sugar labels) uses bone char at its Vancouver refinery, however in eastern Canada and at the Taber Sugar Beet refinery, bone char is not used. Redpath does not use bone char.

c) It is used to refine crude oil in the production of petroleum jelly.

d) Bone char is also used as a black pigment. It is sometimes used for artistic painting because it is the deepest available black, though charcoal black is often satisfactory and is more often used. Ivory black is an artists' pigment formerly made by grinding charred ivory in oil. Today it is considered a synonym for bone char. Ivory is no longer used because of the expense, and because animals who are natural sources of ivory are subject to international control as endangered species. Source: Wikipedia

  • Bone Char (Granular) Packaging:

55 lbs. net weight per multiply paper bags, bulk bags and fiberboard containers. For further information on packaging options contact READE

  • Bone Char (Granular) TSCA (SARA Title III) Status:

Listed. For further information please call the E.P.A. at +1.202.554.1404

  • Bone Char (Granular) CAS Number:

CAS# 98615-67-9

  • Tags: bone char, bone black, ivory black, animal bone charcoal, animal charcoal, bone charcoal, bone ash, abaiser, bone black #6; bone charcoal; C.I., pigment black 9, CAS# 98615-67-9,







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