Ammonium iron(III) sulfate dodecahydrate

Also known as: Ferric ammonium sulfate dodecahydrate, Ammonium ferric sulfate dodecahydrate, Ammonium iron(III) sulfate 12-water, Iron alum, Ferric alum, Ammonium iron sulfate dodecahydrate, Iron ammonium sulfate dodecahydrate, azanium,iron(3+),disulfate,dodecahydrate, iron(iii) ammonium sulfate dodecahydrate

Ammonium iron(III) sulfate dodecahydrate (CAS 7783-83-7) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula FeH28NO20S2 and a molecular weight of 482.192 g/mol. Key properties include a melting point of 39-41 °C(lit.), a boiling point of 230 °C and a density of 1.71. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 7783-83-7
Jingsj CID: J-1097297-5
Molecular Formula: FeH₂₈NO₂₀S₂
Molecular Weight: 482.192 g/mol
Category: Inorganic Chemicals
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	39-41 °C(lit.)
Boiling Point	230 °C
Density	1.71
Exact Mass	481.999542
PSA	288.45000
Additional Property	1240 g/L (25 ºC)

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation

Customs & Trade Information

HS Code	28333000

Frequently Asked Questions

What is the CAS number of Ammonium iron(III) sulfate dodecahydrate?

The CAS number of Ammonium iron(III) sulfate dodecahydrate is 7783-83-7.

What are the molecular formula and molecular weight of Ammonium iron(III) sulfate dodecahydrate?

Ammonium iron(III) sulfate dodecahydrate has molecular formula FeH28NO20S2 and molecular weight 482.192 g/mol.

Is Ammonium iron(III) sulfate dodecahydrate hazardous?

Ammonium iron(III) sulfate dodecahydrate has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Ammonium iron(III) sulfate dodecahydrate (CAS 7783-83-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1097297-5 (accessed 2026-11-07).

Data for reference only; verify product details with suppliers before purchase.