THPS (tetrakis(hydroxymethyl)phosphonium sulfate), CAS 55566-30-8, is a water-soluble organophosphorus biocide supplied as an aqueous solution. It is used as a broad-spectrum antimicrobial in industrial water systems – notably oilfield water injection, cooling water and process water – and as a precursor in flame-retardant chemistry. PolyBlueChem supplies THPS to the specification below with per-batch COA and SDS.
Specifications
| Parameter | Specification |
|---|---|
| Content (as [(HOCH2)4P]2SO4) | 75.0% min |
| Viscosity (25 °C) | 30.0 – 40.0 mPa·s |
| Relative density (25 °C) | 1.350 – 1.420 |
| Iron (Fe) | 20 ppm max |
| pH | 2.5 – 5.5 |
The content (75.0% min) confirms the active strength of the aqueous solution; the low iron limit (20 ppm max) suits systems sensitive to metal fouling, and the acidic pH (2.5 – 5.5) is characteristic of THPS solutions. A specification sheet and a certificate of analysis (COA) for each batch are available on request.
Basic Information
| CAS number | 55566-30-8 |
| Chemical name | Tetrakis(hydroxymethyl)phosphonium sulfate |
| Synonyms | THPS; tetrakis(hydroxymethyl)phosphonium sulfate; bis[tetrakis(hydroxymethyl)phosphonium] sulfate |
| Formula unit | [(HOCH2)4P]2SO4 |
| Type | Organophosphorus biocide (aqueous solution) |
| Form | Aqueous solution (~75% active) |
Applications
- Oilfield water injection – control of sulphate-reducing and other bacteria in injection and produced water.
- Industrial water treatment – cooling water, process water and recirculating systems.
- Pulp and paper – slime control in papermaking systems.
- Flame-retardant chemistry – a precursor for textile flame retardants (THP/THPC chemistry).
- Other uses – leather treatment and other antimicrobial applications.
Packaging and storage
- IBCs, drums or as agreed; keep sealed.
- Per-batch certificate of analysis (COA) and safety data sheet (SDS).
- Store in a cool, ventilated place, away from alkalis and oxidisers; THPS is acidic.
PolyBlueChem supplies THPS (CAS 55566-30-8) to this specification, with per-batch COA and SDS and FOB/CIF delivery. Contact us with your application, tonnage and delivery port for a quotation.
