Product show
Tetrakis(hydroxymethyl)phosphonium sulfate (THPS)
Identification
Synonyms: Octakis(hydroxymethyl)diphosphonium sulfate; Tetrakis(hydroxymethyl)phosphonium sulfate (2:1); THPS
CAS No.: 55566-30-8 EC No.: 259-709-0
Molecular Weight: 406.278
Structural Formula: 
Molecular Formula: C8H24O12P2S
m.p.: -35 deg. C
b.p.: 111 deg. C
Specific gravity:
Solubility in water: min. 10g/100ml @ 18 deg. C
Preparation
THPS may be obtained by reaction between PH3 (phosphine, co-product of sodium hypophosphite), sulfuric acid and formaldehyde.
Application
THPS is an environment-friendly phosphonium salt biocide applied in industrial cooling systems, oil field operations, and paper-making industry. THPS can degrade to a nontoxic substance immediately after use. THPS is also applied as flame retardant in cotton, dacron-cotton fibers.
Specification*
| Items | Specification |
|---|---|
| THPS active content | 75% min. |
| appearance | colorless or pale yellow liquid |
| density @ 25C | 1.37~1.41 g/ml |
| phosphorus content | 11% min. |
| pH | 3~4 |
| viscosity @ 20C | 30~45 cps |
Standard Packaging
250kg/plastic drum; 1250kg/IBC, ISO tank
Risks and Safety Information
THPS is regulated by UN as hazardous substance
Proper Shipping Name: Corrosive liquid, toxic, N.O.S.
UN 2922, Class 8, Sub-hazard 6.1,
PG: III
Hazard Label: Corrosive, Toxic
R-Phrase: R:25 34
S-Phrase: S:26 27 36/37/39 45
For more information please see MSDS
