Sodium Hexametaphosphate
| Formula: | (NaPO₃)₆ |
| CAS Number: | 10124-56-8 |
| EC Number (EINECS): | 237-767-1 |
| HS Code: | 28352600 |
| UN Number: | Not classified as hazardous for transport |
| IUPAC Name: | Sodium polyphosphate |
| Also Known As: | SHMP; Calgon; Glassy Sodium Phosphate |
| Molecular Weight, g/mol: | 611.77 (for hexamer) |
Typical Specifications
| Appearance: | White, glassy granules or powder |
| Odor: | Odorless |
| Melting Point, °C: | 622 (decomposes) |
| Boiling Point, °C: | Decomposes above 1000 |
| Density, g/cm³ (at 20°C): | 2.36 |
| Solubility: | Soluble in water (~35% at 20°C) |
| pH (1% solution): | 5.5–6.5 |
| Purity, %: | ≥95 |
| Grades Available: | Technical, Food Grade (FCC) |
| Packaging: | 25kg bags, 500kg jumbo bags, bulk |
Applications / Uses
Primary Applications
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Water softening and sequestrant in detergents
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Dispersing agent in ceramics and clay processing
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Food additive (stabilizer, emulsifier) in canned seafood, dairy, and beverages
Secondary Applications
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Prevents scale formation in boilers and cooling systems
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Used in oil well drilling fluids as a dispersant
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Ingredient in adhesives, paints, and textile processing
End Industries Served: Food & Beverage, Water Treatment, Ceramics, Detergents, Oil & Gas, Textile, Adhesives, Paints
Safety & Handling Information
Hazard Class (GHS): Not classified as hazardous; may cause irritation
Hazard Statements (H-Codes):
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H319: Causes serious eye irritation (dust)
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H335: May cause respiratory irritation (dust)
Precautionary Statements (P-Codes):
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P261: Avoid breathing dust
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P280: Wear protective gloves/eye protection
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P305 + P351 + P338: IF IN EYES – rinse cautiously with water, remove contact lenses if present
Storage Conditions
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Store in a cool, dry, ventilated place
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Protect from moisture and contamination
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Keep packaging tightly sealed
Transport Information
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ADR/RID: Not classified as dangerous goods
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IMDG: Not classified as dangerous goods
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IATA: Not classified as dangerous goods