Chloroplatinic acid crystal (CPA)

Appearance
Orange- red crystalline aggregates

Metal content
39.00 – 40.50 % w/w platinum

Chloride
39.00 – 47.00 % w/w OSB

Insolubles
In water - 0.01 % w/w maximum
In n-pentanol - 0.01 % w/w maximum
In 2-propanol* - 0.01 % w/w maximum
*at a concentration of 168 g Pt / L

Impurities
All figures are w/w with respect to platinum:
Precious metals (Rh, Ir, Pd, Os, Ru, Au, Ag) – total 250 ppm maximum, 100ppm each.

Alkali metals (Na, K) – total 200 ppm maximum.

Base metals (Al, Ba, Ca, Cu, Fe, Mg, Ni, Si) - total 500 ppm maximum, 200ppm each.

Others – total 100 ppm, 50 ppm each

Precious metals
Rh, Ir, Pd, Os, Ru, Au, Ag Individual - 100 ppm maximum*
Total 250 ppm maximum

Alkali metals
Na, K Total - 200 ppm maximum**

Base metals
Al, Ba, Ca, Cu, Fe, Mg, Ni, Si - Individual 200 ppm max.
Total 500 ppm max.

Others individual
50 ppm maximum
Total 100 ppm maximum