Description

Aluminum Sodium Sulfate, Dodecahydrate is a hydrated double salt of aluminum and sodium sulfate, widely recognized for its role as a clarifying and precipitating agent. This compound is valued for its effectiveness in water purification and as a mordant in textile dyeing, ensuring consistent and reliable performance in industrial processes. It serves critical functions in the paper manufacturing, textile, and water treatment industries, where precise chemical control is essential.

Application

• Water Treatment & Purification: Acts as a highly effective coagulant and flocculant for clarifying drinking water and treating industrial wastewater.
• Paper Manufacturing: Used as a sizing agent and retention aid to improve paper strength, quality, and production efficiency.
• Textile Industry: Serves as a mordant in dyeing processes to fix colors onto fabrics, enhancing color fastness and vibrancy.
• Cosmetics & Personal Care: Employed as an astringent and clarifying agent in certain skincare formulations.
• Food Processing (where compliant): Functions as a firming agent and pH control substance in specific food-grade applications.
• Construction Materials: Used as an additive in cement and other building materials to control setting time and improve properties.
• Laboratory & Research: Utilized as a reagent or standard in analytical chemistry and educational settings.
• Leather Tanning: Assists in the processing and finishing of leather goods.

Basic Information

Product Name	Aluminum Sodium Sulfate, Dodecahydrate
CAS No.	32457-86-6
Molecular Formula	AlNa(SO₄)₂·12H₂O
Molecular Weight	458.28 g/mol
Synonyms	Sodium Aluminum Sulfate Dodecahydrate; SAS; Alum Sodium; Sodium Alum; Soda Alum; Aluminum Sodium Sulfate 12-Hydrate; NaAl(SO₄)₂·12H₂O; EINECS 251-088-9
EINECS	251-088-9

Quality Control

Our Aluminum Sodium Sulfate, Dodecahydrate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, heavy metal content, and clarity of solution are available upon request. We can supply grades suitable for industrial, technical, and food-contact applications, with compliance to relevant standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept in original packaging away from sources of humidity to prevent caking and degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White crystalline powder or lumps
Identification (IR)	Conforms
Assay (AlNa(SO₄)₂·12H₂O)	≥ 98.0 %
pH (5% solution)	2.5 - 4.0
Water Insoluble Matter	≤ 0.1 %
Chloride (Cl)	≤ 0.01 %
Heavy Metals (as Pb)	≤ 10 ppm
Iron (Fe)	≤ 0.01 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.