CLUSTER 05 · DESICCANTSVERIFYING
Molecular Sieves
3A / 4A / 5A beads
At a glance
CAS70955-01-0 (4A)
HS / TARIC3824 40 00 (construction) · 3815 12 00 (catalysts)
REACHRegistered · full registration on file
PACK FORMAT25 kg PE-lined paper-aluminium bags · 150 kg steel drums
What it does
Synthetic zeolite molecular sieves (3A / 4A / 5A / 13X) — crystalline aluminosilicates with precisely-sized pores that selectively adsorb molecules by kinetic diameter. 3A for insulating-glass units; 4A and 13X for industrial drying and gas separation.
Typical applications
- 3A: insulating glass spacer drying · ethanol dehydration
- 4A: refrigerant and solvent drying · industrial gas purification
- 5A: n-paraffin separation · oxygen / nitrogen PSA
- 13X: CO₂ removal · sweetening of natural gas
Specification band
Static H₂O adsorption (25 °C, 17.5 mmHg)≥ 21% (3A) · ≥ 22% (4A) · ≥ 24% (13X)
Bead / pellet size1.5 mm · 3 mm · 3–5 mm (beads or pellets)
Crush strength≥ 30 N (3 mm beads)
Bulk density0.66 – 0.78 g/cm³
Loss on attrition≤ 0.3%
Package moisture≤ 1.5%
Industry-typical published bands. Producer-specific values on the COA issued per shipment.
Handling & packaging
- Highly hygroscopic — packaging must be hermetic until use
- Shelf life 18 months in sealed original packaging
- Heat-of-adsorption can warm container — handle dry
- Not classified as hazardous for transport
Documents on file per shipment
Per-lot COA with adsorption capacity, crush strength, particle size, package moistureSDS in EU CLP formatTARIC classification confirmed in writing before shipmentOrigin / production-batch trace
Serica execution notes
- TARIC code (3824 40 00 vs 3815 12 00) confirmed by broker per shipment — classification has real duty implications.
- Package moisture verified at origin so the sieves are still active when they reach the buyer's IG line.
- DDP to gate · repeat-purchase packaging consistent on every reorder.
Regulatory references
Pricing, MOQs, lead-times and producer identities are quoted per buyer.