Description

Aluminum Sulfate CAS NO 18475-35-9 is an inorganic salt widely recognized for its role as a highly effective flocculating and coagulating agent. Its primary value lies in its ability to clarify water by removing suspended particles, making it indispensable for water treatment processes. This compound is essential for industries including municipal water purification, paper manufacturing, and textile processing, where reliable chemical performance is critical.

Application

• Water Treatment: Acts as a primary coagulant for clarifying drinking water and treating industrial wastewater.
• Paper Manufacturing: Used in the sizing process to improve paper's resistance to water and ink.
• Textile Industry: Serves as a mordant in dyeing processes to fix colors to fabrics.
• Cosmetics & Personal Care: Employed as an astringent in products like antiperspirants and styptic pencils.
• Construction: Functions as an accelerator in concrete formulations and for soil stabilization.
• Agriculture: Used to lower soil pH, making it more suitable for certain plants.

Basic Information

Product Name	Aluminum Sulfate
CAS No.	18475-35-9
Molecular Formula	Al2(SO4)3 · xH2O
Molecular Weight	342.15 g/mol (anhydrous basis)
Synonyms	Aluminium Sulfate; Sulfuric Acid, Aluminum Salt (3:2); Cake Alum; Filter Alum; Papermaker's Alum; Alum; Aluminum Trisulfate; Dialuminum Trisulfate; EINECS 242-303-8
EINECS	242-303-8

Quality Control

Our Aluminum Sulfate is manufactured under a stringent quality management system to ensure batch-to-batch consistency and reliability. We provide comprehensive quality assurance, with product specifications meeting relevant industrial and technical standards. A Certificate of Analysis (COA) is available for every shipment to verify parameters such as assay, iron content, and insolubles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials. Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption and caking. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F).

Specification

Item	Specification
Appearance	White crystalline solid or lumps
Identification (IR)	Conforms
Assay (as Al2(SO4)3)	≥ 98.0 %
Iron (Fe)	≤ 0.01 %
Water Insoluble Matter	≤ 0.1 %
pH (5% Solution)	2.5 - 4.0

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