Monoammonium ferric disulfate, also known as ferric ammonium sulfate or iron alum, is a double salt in the class of alums. It commonly appears as weakly violet, octahedral crystals.
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CAS 10138-04-2
Ferric sulfate
Coagulant for industrial wastes
Manganese(II) sulfate monohydrate
Manganese source for fertilizers and feed additives
Aluminium sulfate
coagulating agent
Ferrous ammonium sulfate
analytical reagent and polymerization catalyst
5-Norbornene-2-carboxylic acid ethyl ester
Research chemical intermediate
Hexanoic acid, 6-chloro-, ethyl ester
chemical intermediate
Acetaldehyde, bis(2-methoxyethyl) acetal
acetal solvent or intermediate
1-Propanesulfonyl chloride
Sulfonyl chloride reagent for chemical synthesis
The international HS code for Monoammonium ferric disulfate (CAS 10138-04-2) is 2833.30.
2833.30
2833 30 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
azanium;iron(3+);disulfate
XGGLLRJQCZROSE-UHFFFAOYSA-K
[NH4+].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Fe+3]