Tetrakis(hydroxymethyl)phosphorus sulfate(THPS)

Tetrakis(hydroxymethyl)phosphorus sulfate has a phosphorus content of 11%, PH value of 3-5, CAS No.: 55566-30-8, its structural formula contains four hydroxyl OH-, the active phosphorus content is high, so it has a good bactericidal effect and good water solubility, no toxicity, can be used alternately with glutaraldehyde. Tetrakis(hydroxymethyl)phosphonium sulfate in oilfield mining mainly play a bactericidal, scale inhibition, removal of ferrous sulfide effect, in aquaculture is generally prepared into the effective content of 10% of the particles, to the end of the change, water, disinfection effect, there is no effect of cyanobacteria killing, need to be used alternately with the oxygenating agent. Tetrakis(hydroxymethyl)phosphonium sulfate has certain flame retardant effect in leather, also can react with urea to generate THPS-Urea flame retardant.

Basic information

English name: Tetrakis hydroxymethyl phosphonium sulfate(THPS)

H.S code: 2931909090

CAS code: 55566-30-8

Molecular Formula: [(CH2OH)4P]2SO4

Molecular Weight: 406.27

EINECS No.: 259-709-0

Density: 1.35-1.42g/ml

Melting point: -35℃

Boiling point: 111℃

Flash point: 96℃

Dangerous Goods Transportation No.: UN 2922 8/PG 3

Hazardous Rank: Class 8

Export Tax Refund Rate: 13%

Quantity of 20 feet small container: 1.4*14 barrels (19.6 tons) or 1.4*18 barrels ( 25.2 tons)

Export procedures: need to apply for commodity inspection and dangerous package certificate

Physical and Chemical Properties: colorless transparent liquid, miscible in water, insoluble in acetone and ethanol

Product index

Content ≥75%

Active phosphorus ≥11.0%

Specific gravity (25C): 1.37-1.41g/ml

Viscosity (20C): 30-45CP (mPa.s)

Iron (Fe) ≤0.0015%

PH value: 2.5-5.5

The principle of sterilization

1, tetrakis(hydroxymethyl)phosphorus sulfate dissolved in water releases a large number of hydroxymethyl, can be oxidized with the cell membrane of microorganisms, destroying the structure of the cell membrane and biological functions, and at the same time can destroy the structure of bacterial proteins, nucleic acids, etc., greatly reducing its biological activity, interfering with the genetic information of bacteria, preventing their growth and reproduction.

2, The charge of neutral phosphorus atoms of THPS can react and transfer with the negative charge on the surface of cell membrane of bacteria, fungi and viruses, thus changing the biological properties of the membrane. Methyl and other hydrophobic groups will be rearranged according to the direction into the hydrophobic region of the cell membrane, interfering with the arrangement of cell membrane lipids, thus destroying its structure, and finally leading to the disintegration of its nucleic acids, proteins, and the stability of the cytosol, and the cells become inactive.

Product characteristics

1, 5-10mg/L concentration has a good bactericidal effect, the duration of up to 48 hours, belong to the low additive amount of fungicides.

2, good compatibility, can be used with a variety of pesticides and other fungicides, play a synergistic or synergistic effect. However, it can not be mixed with strong oxidizer, metal salt, strong alkali, etc., or it will lead to failure.

3, environmentally friendly, tetrakis(hydroxymethyl)phosphine sulfate after a series of electrochemical, redox reaction, acid-base neutralization reaction generates sulfate, phosphate residues, harmless to water and the environment, phosphate or part of the biological effective fertilizer.

4, good stability, recommended shelf life of 2 years, such as good storage conditions, unopened, up to 3-4 years of validity. The physical and chemical stability is excellent in the same kind of fungicide.

Packaging, storage and transportation

250 kg / barrel or 1.4 tons / IBC barrels; stored in a cool, dry warehouse, avoid direct sunlight, and oxidizing agents and other chemicals stored separately.

Tetrakis(hydroxymethyl)phosphonium sulfate has a low freezing point and can be used in cold areas of the northern hemisphere. It is water-soluble and can be dissolved with water in any proportion, and is widely used in oilfield mining, aquaculture, indoor sterilization, leather flame retardant and other fields. Generally the effect of compounding is better than using alone. Tetrakis(hydroxymethyl)phosphonium sulfate has fewer hazards and drawbacks, but in aquaculture, it can consume oxygen and increase the phosphorus content in the water body.