Tetrakis Hydroxymethyl Phosphonium Chloride (THPC)
Tetrakis Hydroxymethyl Phosphonium Chloride (THPC), a versatile organophosphorus compound revolutionizing safety and efficiency across industries. With the chemical formula [P(CH2OH)4]Cl, THPC is a water-soluble phosphonium salt renowned for its exceptional flame-retardant and antimicrobial properties. Ideal for textiles, water treatment, and more, THPC delivers unmatched performance for industrial applications.
| Chemical formula: | (HOCH2)4PCl |
| Molecular weight: | 190.56 |
| Standard executed: | Q/XFH 11-2013 |
| Properties: | Transparent liquid in appearance. |
| CAS No. | 124-64-1 |
| Packaging and storage: | In 200L drums and 1000L IBC. Store in a shady and well-ventilated area. |
Applications
Textile and Flame Retardancy
- Cotton and Cellulosic Fabrics: Padded at 15-30% on weight of fabric (owf), followed by ammonia cure at 100-120°C, yielding flame-retardant upholstery and workwear with >20 wash cycles durability.
- Nonwovens and Blends: Applied via foam or spray for antimicrobial protection in medical gowns and filtration media, reducing bacterial colonization by 4 logs.
Paper and Industrial Uses
- Pulp and Paper Slime Control: Dosed at 200-400 ppm in recirculating waters to prevent microbial deposits, enhancing machine runnability and sheet quality.
- Polymer Cross-Linkers: Incorporated at 1-5% in latex emulsions for adhesives and coatings, improving wet strength and adhesion to substrates.
- Water Treatment: Biocide in cooling towers and drilling fluids at 50-150 ppm to combat sulfate-reducing bacteria and biofilms.
Why Choose Our THPC?
Our Tetrakis(Hydroxymethyl) Phosphonium Chloride is purified to minimize free formaldehyde (<0.5%) and phosphine residues (<10 ppm), ensuring odorless application and consistent fixation rates. Textile finishers achieve 30% better flame retardancy retention post-laundering. Supplied as 50-80% solutions in 250kg drums, 1300kg IBCs, or bulk deliveries, with customizable concentrations and certifications for OEKO-TEX and EPA compliance.
Frequently Asked Questions (FAQs)
What is Tetrakis(Hydroxymethyl) Phosphonium Chloride (THPC)?
Tetrakis(Hydroxymethyl) Phosphonium Chloride (THPC) is a phosphonium-based compound with formula [(HOCH₂)₄P]Cl and CAS 124-64-1, used as a biocide and flame retardant. It’s a water-miscible liquid that fixes durably to fibers for antimicrobial and fire-resistant finishes.
How is THPC applied in textile flame retardancy?
THPC is exhausted or padded onto fabrics at 20-25% owf, dried, then cured with gaseous ammonia to form a polymeric char-former. Post-cure washing removes byproducts, achieving vertical flame test passes with minimal weight gain.
Is THPC safe for consumer textiles?
Yes, THPC-treated materials meet skin-contact standards with low cytotoxicity; it hydrolyzes to non-toxic fragments and is approved for apparel under REACH Annex XVII, with no bioaccumulation risk.
What is the shelf life of THPC?
In sealed, cool storage (<25°C) protected from light, THPC solutions maintain ≥95% activity for 12-24 months, with slow hydrolysis—test pH periodically for extended use.
Can THPC be used with other flame retardants?
THPC synergizes with phosphorus esters or nitrogen synergists for halved loadings but avoid oxidants like hypochlorite; compatibility in pad baths is confirmed via stability trials.
Does THPC release formaldehyde during use?
THPC generates trace formaldehyde during curing (<100 ppm), far below thresholds, and our low-residue grade minimizes emissions—ventilate during ammonia treatment for safety.
What packaging options are available for THPC?
We provide 250kg plastic drums, 1300kg composite IBCs, and 20MT isotanks, all acid-resistant and labeled for hazardous material shipping under UN 2810.
For finishing recipes, safety evaluations, or procurement details, our technical team delivers prompt solutions.
Contact Us
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