Description

Molecular Sieves Pack 4A CAS NO 70955-01-0 is a highly effective synthetic zeolite adsorbent with a uniform pore size of approximately 4 angstroms, designed for selective adsorption based on molecular size and polarity. This product is critical for achieving and maintaining extremely low dew points in gases and liquids, ensuring process integrity and product quality. It is an essential component for industries requiring deep drying, purification, and separation, such as natural gas processing, petrochemical refining, and insulated glass manufacturing.

Application

• Deep Drying of Gases and Liquids: Removal of water vapor from natural gas, air, cracked gas, hydrogen, oxygen, carbon dioxide, and various organic solvents and liquids.
• Insulated Glass (IGU) Desiccant: Packed in the spacer frame to adsorb residual moisture and process gases, preventing fogging and ensuring long-term thermal insulation performance.
• Refrigerant Drying: Protection of refrigeration and air conditioning systems by removing moisture from refrigerants like R-134a and others.
• Petrochemical & Refining: Purification of hydrocarbon streams, removal of water and carbon dioxide from liquid propane gas (LPG), and drying of reformer feedstocks.
• Static Dehydration: Protection of sensitive electronic components, pharmaceuticals, and valuable goods during storage and shipment in sealed containers.
• Medical Oxygen Concentrators: Used in pressure swing adsorption (PSA) systems to produce high-purity oxygen from ambient air.
• Industrial Air Compressors: Integrated into compressed air dryers to deliver clean, dry air for pneumatic tools and instrumentation.
• Laboratory & Instrumentation: Providing ultra-dry carrier gases for gas chromatography (GC) and other analytical instruments.

Basic Information

Product Name	Molecular Sieves Pack 4A
CAS No.	70955-01-0
Molecular Formula	Na12[(AlO2)12(SiO2)12]·xH2O
Molecular Weight (Anhydrous Basis)	~ 821.08 g/mol
Synonyms	Zeolite 4A; Sodium Aluminosilicate (Type A); Molecular Sieve Type 4A; 4A Zeolite; MS 4A; 4Å Molecular Sieve; Adsorbent 4A; Desiccant 4A; KA Zeolite (Potassium form variant); Linde Type A (LTA) Zeolite
EINECS	Contact for details

Quality Control

Our Molecular Sieves Pack 4A is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure it meets critical performance parameters such as adsorption capacity, crush strength, and bead/pellet integrity. While produced to meet general industrial specifications, we can tailor products to align with specific customer requirements or industry standards. Certificates of Analysis (COA) detailing key physical and chemical properties are available for every shipment.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the original container sealed until use to prevent premature adsorption of atmospheric moisture, which reduces effective capacity. Store away from strong acids and strong oxidizing agents.

Specification

Item	Specification
Form	Spherical Beads or Cylindrical Pellets
Pore Diameter	4 Ångstroms (0.4 nm)
Bulk Density	Approx. 0.65 - 0.75 g/ml
Static H2O Adsorption Capacity (wt%)	≥ 21.0 (at 25°C, 17.5 mmHg P/P0)
Crush Strength	≥ 30 N/bead (or per pellet)
Attrition Loss	≤ 0.5 % (wt/wt)
Package Moisture Content	≤ 1.5 % (wt/wt)
Size (Mesh)	Common: 4-8 mesh, 8-12 mesh, 1/16", 1/8" (Custom sizes available)

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