Food Grade Ammonium Alum (Crystalline Powder)

Description

Product Name: Ammonium Alum

Chemical Name: Aluminum Ammonium Sulfate Dodecahydrate

Molecular Formula: NH₄Al(SO₄)₂·12H₂O

Molecular Weight: 453.33

CAS No.: 7784-26-1

Appearance: Colorless transparent crystals / white crystalline powder or granules

Features: High purity, low impurities, good solubility, stable performance

Parameter

Food Grade

Item	Specification
Aluminum ammonium sulfate [NH₄Al(SO₄)₂·12H₂O] (dry basis), ω/%	≥99.5
Lead (Pb) content / (mg/kg)	≤5.0
Arsenic (As) content / (mg/kg)	≤2.0
Selenium (Se) content / (mg/kg)	≤30.0
Fluorine (F) content / (mg/kg)	≤30.0

Industrial Grade

Item	Superior Grade	First Grade	Qualified Grade
Aluminum ammonium sulfate [NH₄Al(SO₄)₂·12H₂O] (dry basis), % ≥	99.2	98.6	97.6
Iron (Fe) (dry basis), % ≤	0.01	0.01	0.05
Heavy metals (as Pb), % ≤	0.002	0.002	0.005
Arsenic (As), % ≤	0.0002	0.0005	0.001
Water-insoluble matter, % ≤	0.2	0.4	0.6
Moisture, % ≤	1.0	1.5	2.0

Main Applications

1. Wastewater Treatment: Flocculation and sedimentation of industrial wastewater and printing & dyeing wastewater; turbidity removal, decolorization, and heavy metal removal.
2. Leather Industry: Aluminum tanning agent, post-treatment agent for leather tanning.
3. Dye Industry: Dye resist agent, color development auxiliary.
4. Other Fields: Yellow glass colorant, electroplating buffer, starch additive.

Advantages

• High purity, low impurities, stable performance
• Good solubility
• Available in block, granular and powder forms
• Support customized packaging, OEM, COA and MSDS
• Sufficient stock, fast delivery, support sea / land / intermodal transportation

Packaging & Storage

Service & Cooperation

• Provide samples, COA, MSDS and customs declaration documents
• Support small trial orders and largescale longterm supply
• Support factory audit and thirdparty inspection
• Professional foreign trade team: onestop service from quotation → contract → production → quality control → delivery → aftersales