CAS No: 9084-06-4 · HS Code: 3824.40
PNS (Polynaphthalene Sulphonate, also known as naphthalene formaldehyde sulphonate or naphthalene superplasticiser) is a second-generation high-range water reducer widely used in ready-mix concrete, precast concrete, and concrete products across GCC construction markets. Before PCE (polycarboxylate ether) became dominant, PNS was the standard superplasticiser for high-strength and flowing concrete — and it remains widely specified in GCC precast operations, concrete product manufacturing, and applications where its interaction with cement is well-characterised.
Quick Specifications
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| PARAMETER | SPECIFICATION | TEST METHOD |
|---|---|---|
| CAS Number | 9084-06-4 | |
| Chemical Type | Sodium salt of polynaphthalene sulphonate condensate | |
| Appearance (liquid) | Dark brown viscous liquid | Visual |
| Appearance (powder) | Light brown to beige powder | Visual |
| Solids Content (liquid) | 38 – 42 % | ISO 3251 |
| pH | 7.0 – 9.5 | |
| Sulphate Content (as SO₃) | ≤ 2.0 % | Gravimetric |
| Chloride Content | ≤ 0.1 % | Volhard |
| Water Reduction | 12 – 25 % | ASTM C494 |
| Compliance | ASTM C494 Type A/F, BS EN 934-2 | |
| Shelf Life | 12 months sealed |
Precast Concrete — Rapid Demould
PNS is the standard superplasticiser in GCC precast operations (blocks, pipes, piles, prestressed elements) where high early strength and controlled set time are required for efficient demould and production cycling.
Concrete Masonry Products
Used in zero-slump concrete block and paving block production to improve mix workability and compaction without water addition — maintaining high density and strength in machine-compacted products.
High-Strength Concrete (HSC)
Provides water reduction of 15–20% at standard dosage in GCC HSC mixes (≥ C50 grade) — increases 28-day compressive strength significantly vs non-plasticised control.
Oil Well Cementing
Powdered PNS is widely used as a dispersant/water reducer in API cement slurries for ADNOC, Aramco, QatarEnergy, and KOC well cementing operations — compatible with oil well cement at high temperatures and pressures.
Refractories & Ceramics
Powdered PNS used as a pressing and casting deflocculant in ceramic and refractory manufacturing across GCC industrial operations.
Dosage: 0.5–2.0% by weight of cement (liquid at 40% solids). Above 2.0% provides limited additional benefit and may cause set retardation. For most GCC standard concrete, PCE (polycarboxylate ether) provides superior water reduction at lower dosage — PNS is preferred for precast, concrete products, and oilfield applications where its specific performance characteristics are required. Contact Raykem for combined PNS + sodium gluconate dosage recommendations for GCC summer precast operations.
Liquid: store at 5–40°C in sealed drums. Avoid freezing — may cause viscosity increase (usually reversible on warming). Powder: store in sealed bags in a dry warehouse. Shelf life: 12 months.
Full Certificate of Analysis (COA), Safety Data Sheet (SDS/MSDS), and Technical Data Sheet (TDS) supplied with every shipment from Dubai or Riyadh.
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