Product Information
Chemical Name: Tetrakis(hydroxymethyl)phosphonium Sulfate
Alias: THPS, Bis[tetrakis(hydroxymethyl)phosphonium] sulfate
CAS No.: 55566-30-8EINECS No.: 259-707-9
Molecular Formula: C₈H₂₄O₁₂P₂S
Molecular Weight: 406.28MDL No.: MFCD00054243
Chemphysical Properties
Appearance Colorless to pale yellow transparent liquid
Odor Slight characteristic odour
Density (25℃) 1.35–1.40 g/cm³pH (25℃, neat) 3.0–5.0
Melting Point -35℃
Flash Point ≥96℃
Viscosity (25℃) 30–36 mPa·s
Solubility Fully miscible with water
Quality Specification (THPS 75% Standard Grade)
| Test Item | Specification |
|---|---|
| Active Content (THPS) | ≥75.0 % |
| Active Phosphorus | 11.4–11.8 % |
| Iron (Fe) | ≤0.002 % |
| Water | Balance |
| Colour (APHA) | ≤200 |
Use & Application
Oilfield biocide for water injection system to control sulfate reducing bacteria;
Biocide for industrial circulating cooling water to inhibit bacteria, fungi and algae;
Biocide for pulp & paper wet-end system;
Textile durable flame retardant for cotton fabric; leather preservative.
Packing
25kg plastic drum, 250kg HDPE drum, 1000L IBC tote tank, customized packing available.
Delivery & Storage
Store in tightly closed container in cool, dry, ventilated warehouse.
Keep away from strong alkali, oxidizing agents and heat source. Transport as UN2819 Class 8 corrosive liquid.
Shelf life: 12 months under proper storage.
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