Molekula
Aluminium potassium sulfate dodecahydrate
Aluminium potassium sulfate dodecahydrate, also known as alum, is a crystalline compound used in water purification, dyeing, and as a mordant in textile processing. It is a double sulfate salt of aluminium and potassium with 12 water molecules of hydration. CAS: 7784-24-9, molecular formula: AlK(SO4)2·12H2O, molecular weight: 474.39 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Aluminium potassium sulfate dodecahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Aluminium potassium sulfate dodecahydrate, also known as alum, is a crystalline compound used in water purification, dyeing, and as a mordant in textile processing. It is a double sulfate salt of aluminium and potassium with 12 water molecules of hydration. CAS: 7784-24-9, molecular formula: AlK(SO4)2·12H2O, molecular weight: 474.39 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Aluminium potassium sulfate dodecahydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Heavy metals | ≤ 0.0005% |
| Water-insoluble matter | ≤ 0.005% |
| pH | 2.9 - 3.1 |
| Assay | ≥ 99.0% |
| Iron (Fe) | ≤ 0.001% |
| Arsenic (As) | ≤ 0.00005% |
| Chloride(Cl) | ≤ 0.0005% |
| Sodium (Na) | ≤ 0.005% |
| Ammonium(NH4) | ≤ 0.005% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | NCH |
| Packing Group | NCH |
| Shelf Life | 24 months |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| CAS Number | 7784-24-9 |
| Molecular Formula | AlK(SO4)2·12H2O |
| Molecular Weight | 474.39 |
| SMILES | [Al].[K].O=S(=O)(O)O.O |
| REACH Code | Y110 |
| HTS Code | 28333000 |
| Tariff Code | 2833300000 |
Safety & GHS
-
Explosive
GHS01
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
For research and industrial use only
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Pricing & pack sizes
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is aluminium potassium sulfate dodecahydrate used for?
It is commonly used as a mordant in dyeing, in water purification, and as a coagulant in wastewater treatment.
What is the chemical formula and molecular weight?
The formula is AlK(SO4)2·12H2O with a molecular weight of 474.39 g/mol.
How should it be stored?
Store at ambient temperature, protected from moisture and heat.
What grade is available?
Available in laboratory grade; custom grades may be available upon request.
Can Molekula supply it in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.