Tetrakis hydroxymethyl phosphonium sulfate

THPS is a broad-spectrum antimicrobial agent primarily used as a biocide in oilfield water systems, cooling water towers, and paper manufacturing. It is highly effective against Sulfate-Reducing Bacteria (SRB). Additionally, it serves as a flame retardant for cotton and polyester-cotton fabrics, providing durable fire resistance without compromising fabric strength.

Buyers must confirm the Active Content (typically 75% or 50%), pH value (usually 3.0 - 5.0), and Specific Gravity (1.37 - 1.41 at 25°C). For flame retardant applications, the Iron (Fe) content must be extremely low (typically <10ppm) to prevent fabric yellowing or degradation during the curing process.

As a chemical product, THPS must have a valid Material Safety Data Sheet (MSDS) and a Certificate of Analysis (COA) for every batch. For international trade, ensure the supplier complies with REACH regulations (EU) or TSCA (USA). Since it is classified as a Class 8 Corrosive Substance (UN 2922 or UN 3265), the packaging must meet UN-certified standards for hazardous goods.

THPS is often preferred because it is readily biodegradable and has a lower toxicity profile compared to formaldehyde-based biocides. It performs exceptionally well in anaerobic environments (like oil wells) and remains stable across a wide pH range, making it more versatile for complex industrial water treatments.

THPS is a dangerous good (DG). The primary risk is leakage and corrosion during transit. You must ensure the supplier uses high-density polyethylene (HDPE) drums or IBC tanks that are properly sealed and labeled. Failure to declare it as a hazardous material can lead to heavy fines, shipment seizure, or port rejection.

Prioritize Audited Suppliers on Made-in-China.com who possess ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) certifications. Request a pre-shipment inspection (PSI) by third parties like SGS or Intertek to verify the active ingredient concentration before the final payment is released.

Focus on volume-based pricing tiers; typically, orders exceeding 20 metric tons (a full 20ft container) can secure a 10-15% discount. Discuss Incoterms clearly—while CIF is convenient, FOB or FCA may offer better control over specialized DG shipping costs if you have a reliable hazardous goods forwarder.

Use Secured Payment services provided by Made-in-China.com to ensure funds are only released after the buyer confirms receipt of goods and documents. For first-time orders, consider a 30% deposit and 70% against the Bill of Lading (B/L) to mitigate financial risk.