Tetrakis Hydroxymethyl Phosphonium Sulfate (THPS) CAS No.55566-30-8, is a highly effective biocide widely used in the oilfield, water treatment, leather, and textile industries. It is a water-soluble, colorless liquid with excellent stability and strong bactericidal properties.
| Chemical formula: | [(HOCH2)4P]2 SO4 |
| Molecular weight: | 406.27 |
| Standard executed: | Q/XFH 09-2014 |
| Properties: | Transparent liquid in appearance. |
| CAS No. | 55566-30-8 |
| Packaging and storage: | 200L drum and 1000L IBC. Stored in shaded and well-ventilated warehouse, away from fire, oxidizers, and acids. |
Applications
Oilfield and Water Treatment
- Microbial Control: Injected at 100-500 ppm in fracturing fluids and pipelines to prevent souring, biofilm, and corrosion from sulfate-reducing bacteria, boosting oil recovery by 10-20%.
- Cooling Towers and Systems: Dosed at 50-150 ppm for algae and bacterial inhibition, reducing maintenance and extending equipment life.
Industrial and Textile Uses
- Paper and Pulp Processing: Added during wet-end stages at 200-400 ppm to control slime and deposits, improving sheet quality and runnability.
- Flame Retardant Finishes: Applied to cotton and cellulosics via padding (15-25% bath) and cured with ammonia for durable UL-94 V-0 ratings in apparel and upholstery.
- Leather Tanning: Used in wet-white processes at 1-3% to achieve soft, light-colored hides with shrink temperatures >70°C, free from chromium residues.
Why Choose Our THPS?
Our Tetrakis(hydroxymethyl)phosphonium Sulfate is produced with pharmaceutical-grade controls, limiting impurities like heavy metals (<5 ppm) and free formaldehyde (<0.1%), for superior stability and performance. Oilfield operators report 25% faster microbial kill rates and extended treatment intervals. Available as 75% solution in 250kg drums, 1250kg IBCs, or bulk tankers, with customizable concentrations and full REACH/EPA compliance for global markets.
Frequently Asked Questions (FAQs)
What is Tetrakis(hydroxymethyl)phosphonium Sulfate (THPS)?
Tetrakis(hydroxymethyl)phosphonium Sulfate (THPS) is a phosphonium-based biocide with formula [(HOCH₂)₄P]₂SO₄ and CAS 55566-30-8, used for microbial control and flame retardancy. It’s a water-miscible liquid that targets bacteria and fungi while degrading harmlessly.
How is THPS applied in oilfield operations?
THPS is typically injected continuously at 100-300 ppm into well fluids or batch-treated in reservoirs; it penetrates biofilms effectively, with monitoring via ATP assays for dosage optimization.
Is THPS environmentally safe?
Yes, THPS earned the EPA’s US Green Chemical designation for its zero toxicity and rapid biodegradation to non-toxic products like methanol and phosphate, safe for marine and freshwater discharge.
What is the shelf life of THPS?
In sealed, cool storage (<30°C) away from incompatibles, THPS retains >95% activity for 12-18 months, with minimal decomposition under neutral conditions.
Can THPS be combined with other biocides?
THPS synergizes with glutaraldehyde or quaternary ammoniums for broader spectrum control but avoid strong oxidizers; compatibility tests ensure no precipitation in blends.
Does THPS affect pH in treatment systems?
THPS’s acidic pH (2.5-3.5) may slightly lower system pH at high doses, but it’s buffered in most applications—neutralize if needed for corrosion-sensitive setups.
What packaging options are available for THPS?
We supply 250kg HDPE drums, 1250kg composite IBCs, and 20-25MT isotanks, all lined for acid resistance and suitable for hazardous goods transport.
For dosing strategies, safety protocols, or volume quotes, our technical advisors are ready to assist.
Contact Us
Optimize your microbial and fire safety solutions with premium THPS—Contact Us for samples, specifications, or expert support. We respond within 24 hours.
