THPS|THPS Supplier & Manufacturer

Tetrakis(hydroxymethyl)phosphonium sulfate(THPS)

NANJING FINECHEM HOLDING CO., LTD

Specifications

Item	Index
Active Content %	75.0 min
Viscosity(25 ℃)MPA. S	Viscosity(25 ℃)MPA. S
Density(20 ℃)g/cm3	1.350-1.420
pH	2.5-5.5

Packing & Storage

Packing	Net weight 250kg in plastic drum Keep hermetic.
Storage	20℃, 2 years.
Shipping	Room temperature in China; may vary elsewhere

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General Information

Chemical & Physical Properties

Safety Information

Synthetic Route

Common Names	Tetrakis(hydroxymethyl)phosphonium sulfate\|Tetrakis(hydroxymethyl)phosphonium sulfate
Structure
CAS　No.	55566-30-8	Boiling Point (℃)	111°C
Molecular Weight	252.18	Melting Point (℃)	'-35°C
Appearance	Transparent colorless viscous liquid	Vapor Specific Gravity	N/A
HS Code	2931900090	Flash Point (℃)	96 °C
Solubility	Soluble in water	Autoignition Temperature (℃)	N/A

	SYMPTOMS	PREVENTION	FIRST AID
Safety Phrases		S26-S36/37/39-S45
RIDADR		UN 2922 8/PG 3
WGK Germany		1
Packaging Group		III
Hazard Class		6.1(b)
Inhalation	Cough. Sore throat.	Use local exhaust or breathing protection.	Fresh air, rest.
Skin	Redness. Burning sensation. Itching.	Protective gloves.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness. Pain.	Wear safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion	Abdominal pain. Nausea. Vomiting.	Do not eat, drink, or smoke during work. Wash hands before eating.	Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

Start with phosphorus trichloride (PCl3) and formaldehyde (CH2O) as the main raw materials.
Mix PCl3 and CH2O in a reaction vessel under controlled conditions, such as low temperature and inert gas atmosphere, to form chloromethylphosphonic acid (CMPA).
React CMPA with formaldehyde in the presence of a base, such as sodium hydroxide (NaOH), to produce tetrakis(hydroxymethyl)phosphonium chloride (THPC).
Neutralize THPC with sulfuric acid (H2SO4) to form Tetrakis(hydroxymethyl)phosphonium sulfate (THPS).
The overall reaction can be represented as follows:
PCl3 + 4 CH2O + 4 NaOH → THPC + 4 NaCl + 3 H2O
THPC + H2SO4 → THPS + HCl

Frequently Asked Questions

What is Tetrakis(hydroxymethyl)phosphonium sulfate(THPS) used for?
This product is a green and environment-friendly quaternary phosphate fungicide, and also a permanent flame retardant for pure cotton and polyester-cotton fabrics internationally recognized.
This product has good water solubility, low freezing point, stable chemical properties, and long-term storage will not affect its quality. It is a new, excellent, high-efficiency, broad-spectrum, low-toxic, low-dose, low-foaming, environmentally friendly fungicide, which has strong killing performance against bacteria and algae. It was approved by the US EPA in 1995, and its toxicity classification was considered zero, and it was awarded the US Green Chemistry Award.