Tetrakis Hydroxymethyl Phosphonium Sulfate

THPS is synthesized through the reaction of phosphine with formaldehyde followed by sulfate formation, yielding a product that decomposes rapidly under aerobic conditions into non-toxic byproducts like orthophosphate and methanol.

Brand:
aozun
Synonym:
Tetrakis(Hydroxymethyl) Phosphonium Sulfate
Appearance:
Transparent liquid in appearance
CAS No.:
55566-30-8
Molecular Formula:
[(HOCH2)4P]2 SO4
Molecular Weight:
406
EINECS:
259-709-0
Solubility:
soluble in water

Availability:



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Product Description

Product Description

Key Features and Benefits

Broad-Spectrum Efficacy: Rapidly eliminates SRB, acid-producing bacteria, and slime-formers, achieving >99% kill rates within hours at low concentrations.
Low Toxicity and Biodegradability: Breaks down quickly in the environment (half-life <24 hours), minimizing ecological impact while complying with EPA and EU discharge standards.
Versatile Compatibility: Stable across pH 2-10 and temperatures up to 120°C, integrating seamlessly with surfactants, polymers, and other treatment chemicals.
Corrosion Inhibition Synergy: Reduces microbially induced corrosion (MIC) in pipelines and equipment, extending asset life and cutting maintenance costs.
Cost-Effective Dosing: High potency allows for economical use in large-scale systems, with no bioaccumulation risks.
Odorless and Non-Volatile: Facilitates safe, odor-free application without special ventilation requirements.

Applications

THPS delivers robust microbial control in challenging environments, supporting operational efficiency and regulatory compliance:

Oil and Gas: Controls bacterial growth in drilling fluids, fracturing operations, produced water, and injection systems to prevent H₂S souring, reservoir plugging, and MIC in pipelines and tanks.
Industrial Water Treatment: Inhibits biofilm formation in cooling towers, boilers, and process water loops, enhancing heat transfer and reducing downtime in power plants, refineries, and manufacturing facilities.
Pulp and Paper: Prevents slime deposits on machinery and in whitewater systems, improving paper quality and machine runnability while meeting hygiene standards.
Wastewater Management: Targets anaerobic bacteria in digesters and effluents, aiding odor control and treatment efficacy in municipal and industrial plants.
Other Uses: Applied in metalworking fluids, leather processing, and aquaculture to mitigate fungal and algal contamination, ensuring product integrity and safety.

THPS supports adherence to standards like API RP 38 for biocide performance and OECD guidelines for environmental fate.

Product Specifications

Property	Specification
CAS Number	55566-30-8
EC Number	259-393-0
Molecular Formula	C₈H₂₄O₁₂P₂S
Molecular Weight	406.28 g/mol
Appearance	Clear, colorless to pale yellow liquid
Assay (THPS Content)	70.0-80.0% (w/w)
pH (10% Aqueous Solution)	3.5-5.5
Density	1.32-1.38 g/mL at 20°C
Viscosity	<100 cP at 25°C
Solubility in Water	Completely miscible
Active Phosphorus	8.5-9.5%
Packaging	200 L drums, 1,000 L IBCs, bulk tankers
Shelf Life	24 months in sealed containers

Note: Technical and custom concentrations (50-75%) available. Each batch is analyzed for microbial efficacy and heavy metals (≤10 ppm total).

Safety and Handling Information

THPS is classified as corrosive to skin and eyes (GHS: H314) and toxic if swallowed (H301), with potential for aquatic toxicity (H412). However, its rapid degradation profile limits long-term risks. Recommended protocols include:

Personal Protective Equipment (PPE): Chemical-resistant gloves, goggles, face shield, and apron. Use respiratory protection in confined spaces with vapors.
Storage: Keep in cool, dry, well-ventilated areas below 40°C, away from strong oxidizers and metals. Store in HDPE or compatible containers to prevent leaching.
First Aid: For skin/eye contact, rinse immediately with water for 15 minutes and seek medical attention. If swallowed, do not induce vomiting; rinse mouth and contact poison control. Inhalation: Move to fresh air and provide oxygen if needed.
Spill Response: Neutralize with sodium bicarbonate, contain with absorbent, and dispose as hazardous waste. Ventilate area to disperse vapors.
Environmental: Use in closed systems to minimize discharge. Biodegradable but monitor effluent phosphorus levels to avoid eutrophication.

Consult the Safety Data Sheet (SDS) for RTECS TA2570000 and UN 2922 transport details.

Frequently Asked Questions (FAQs)

What is Tetrakis(Hydroxymethyl) Phosphonium Sulfate (THPS)?

THPS (CAS 55566-30-8) is a quaternary phosphonium biocide supplied as an aqueous solution. Its structure features four hydroxymethyl groups on a phosphorus center paired with sulfate, enabling potent antimicrobial action through cell membrane disruption.

What are the primary applications of THPS?

THPS is mainly used in oil and gas for souring prevention and corrosion control, industrial water systems for biofilm inhibition, and pulp/paper processes for slime control. It excels in environments prone to SRB and fungal growth.

Is THPS environmentally safe?

Yes, THPS is biodegradable with rapid hydrolysis to non-toxic components, offering a greener profile than persistent biocides. It has low bioaccumulation potential and is approved for use under strict effluent guidelines.

How does THPS compare to other biocides like glutaraldehyde?

THPS provides faster SRB kill times and lower odor, with better stability in high-salinity waters. While both are effective, THPS's biodegradability reduces disposal concerns, though it requires careful handling due to corrosivity.

What is the typical concentration and dosing for THPS?

Supplied at 70-80% active, THPS is dosed at 50-200 ppm for batch treatments or continuously at 10-50 ppm, depending on microbial load and system volume. Efficacy testing via ATP or plate counts is recommended.

Can THPS be customized for specific industries?

Absolutely. We provide tailored formulations, including blends with stabilizers for high-temperature oilfield use or low-dose variants for wastewater, backed by application-specific technical support.

What storage and handling precautions are needed for THPS?

Store in cool, sealed containers away from incompatibles. Handle with PPE to avoid skin/eye contact, and ensure proper ventilation. Shelf life is 24 months when protected from light and heat.