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Ammonium Ferric Sulphate Dodecahydrate 98.5% AR
Ammonium iron (III) sulphate dodecahydrate ; (Ferric Alum)

Product Code.
00207
Grade
AR
Purity
98.5%
CAS No.
7783-83-7
Molecular Formula
NH4Fe(SO4)2.12H2O
Molecular Weight
482.19
H.S.Code
2833.29900
Shelf Life
60 Months

Physical Properties

Physical state at 20 °C
Solid
Colour
Pale violet crystals
Odour
Odorless
pH value
1
Melting point/ Freezing point [°C]
39 - 41 °C
Density [g/cm3]
1.71
Solubility in water [% weight]
482.2 g/l at 20 °C

Packaging

Specification

Appearance
Pale violet crystals
Assay (iodometric)
98.5 - 102%
Insoluble matter
Max 0.01%
Chloride (Cl)
Max 0.001%
Ferrous ion (Fe2+)
Passes test (about 0.001%)
Nitrate (NO3)
Max 0.01%
Calcium (Ca)
Max 0.01%
Magnesium (Mg)
Max 0.005%
Potassium (K)
Max 0.005%
Sodium (Na)
Max 0.02%
Copper (Cu)
Max 0.003%
Zinc (Zn)
Max 0.003%
Substance not precepitated by NH3 (as SO4)
Max 0.05%

Safety Information and Hazard Symbols

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319
Precaution Statement: P305 + P351 + P338