12356-34-2 Usage
Description
Barium hydroxyapatite is a type of hydroxyapatite mineral that is prepared by the aqueous reaction of a soluble barium salt with trisodium phosphate or the monobasic salt and the hydroxide at about 60–80°C with the addition of NaOH to control pH to a minimum of 10–11. It has a molecular weight of 1728.3662 g/mol and a CAS number of 12356-34-2. Barium readily forms mixed hydroxyapatites with both calcium and strontium hydroxyapatites, which can be OH deficient with the charge balance maintained by Ba2+, Sr2+, or Ca2+ vacancies.
Uses
Used in Medical Applications:
Barium hydroxyapatite is used as a bone graft material for promoting bone growth and healing due to its biocompatibility and osteoconductive properties.
Used in Dental Applications:
Barium hydroxyapatite is used as a dental material for tooth repair and restoration, as it closely resembles the natural composition of teeth and can help in remineralization and strengthening of tooth enamel.
Used in Cosmetic Applications:
Barium hydroxyapatite is used as a cosmetic ingredient in skin care products for its potential anti-aging and skin brightening effects, as it may help in improving skin texture and reducing the appearance of fine lines and wrinkles.
Used in Environmental Applications:
Barium hydroxyapatite can be used for the removal of heavy metal ions from wastewater, as it has a high adsorption capacity for various metal ions, making it a potential candidate for environmental remediation.
Used in Research Applications:
Barium hydroxyapatite is used as a model system in research studies to investigate the properties and behavior of hydroxyapatite minerals and their interactions with other ions and molecules, which can contribute to the development of new materials and applications.
Preparation
When barium hydroxyapatite, (Ba10(PO4)6(OH)2,
(abbreviated-BaHAp) was synthesized by a wet method
using Ba(OH)2·8H2O and (NH4)2HPO4 as starting materials,
the Ba-HAp obtained had a Ba/P atomic ratio of
1.76 and contained CO3 groups. Thus, any solution
method to prepare this compound must be protected
fromthe ambient atmosphere in order to obtain a pure salt.
Carbonated barium hydroxyapatite Ba10(PO4)6
(OH)2-2x(CO3)x, where X= 0.30–0.57, produced BaHAP
particles with different Ba/P molar ratios. These were
prepared by a wet method and CO32- ions were incorporated
into OH- sites of a BaHAP lattice during the preparation
at high pH solution. The obtained BaHAP particles
were well crystallized and showed a high thermostability.
On elevating the mixing temperature of the H3PO4 and
Ba(OH)2 solutions, the mean particle size of BaHAP particles
decreased and their specific surface area increased.
The amount of CO2 adsorbed irreversibly on BaHAP
particles increased as their Ba/P molar ratio increased.
In another study, carbonate-containing barium
hydroxyapatite was prepared by solid-state reactions in air at 950°C. Obtained samples were investigated by
X-ray powder diffraction and IR spectroscopy.
Check Digit Verification of cas no
The CAS Registry Mumber 12356-34-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,3,5 and 6 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 12356-34:
(7*1)+(6*2)+(5*3)+(4*5)+(3*6)+(2*3)+(1*4)=82
82 % 10 = 2
So 12356-34-2 is a valid CAS Registry Number.
InChI:InChI=1/5Ba.3H3O4P.O/c;;;;;3*1-5(2,3)4;/h;;;;;3*(H3,1,2,3,4);/q5*+2;;;;-2/p-9
