Chromium (III) Potassium Sulphate Dodecahydrate AR/ACS 500 Gram

PRODUCT CODE 495900
SYNONYMS Alum chrome
C.I. NO. -- CASR NO. (7788-99-0)
ATOMIC OR MOLECULAR FORMULA CrK(SO4
)2
.12H2O
ATOMIC OR MOLECULAR WEIGHT 499.40
PROPERTIES Efflorescent

PARAMETER LIMIT
Description Dark violet crystals.
Solubility 5% solution in water is clear and bright. Minimum assay (lodometric)
(gravimetry)
99.0%
Melting range 88 - 910C

MAXIMUM LIMIT OF IMPURITIES
Ammonium (NH4
) 0.01%
Chloride (Cl) 0.002%
Aluminum (Al) 0.005%
Copper (Cu) 0.001%
Iron (Fe) 0.01%
Lead (Pd) 0.005%