Sigma-Aldrich Hydroxylapatit

grade

puriss.

Quality Level

200

assay

≥90% (calculated on glowed substance)

form

powder

quality

meets analytical specification of pH. Eur., BP, FCC, E341

composition

Ca, 35-40%

impurities

residual solvents, complies
≤0.001% heavy metals (as Pb)
≤0.2% insoluble in HCl

loss

≤8% loss on ignition, 800 °C

anion traces

chloride (Cl^-): ≤1500 mg/kg
fluoride (F^-): ≤50 mg/kg
sulfate (SO₄^2-): ≤5000 mg/kg

cation traces

As: ≤2 mg/kg
Cd: ≤1 mg/kg
Cu: ≤20 mg/kg
Fe: ≤400 mg/kg
Hg: ≤1 mg/kg
Pb: ≤2 mg/kg
Zn: ≤20 mg/kg