Tetrakis(hydroxymethyl)phosphonium sulfate
Synonym(s):Tetrakis(hydroxymethyl)phosphonium sulfate
- CAS NO.：55566-30-8
- Empirical Formula: C8H24O12P2S
- Molecular Weight: 406.28
- MDL number: MFCD00054243
- EINECS: 259-709-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:27:08
What is Tetrakis(hydroxymethyl)phosphonium sulfate ?
Description
Tetrakis(hydroxymethyl)phosphonium sulfate (THPS) is an organophosphorus compound. It is used as a precursor in the flame retardant manufacturing process, a biocide in water systems, and a tanning agent in the leather industry. THPS is a safe aqueous solution with antimicrobial properties that is significantly less toxic, effective at lower concentrations, and more biodegradable than other traditional biocides.
General Description
Clear colorless viscous liquid.
Air & Water Reactions
Water soluble.
Reactivity Profile
Tetrakis(hydroxymethyl)phosphonium sulfate is incompatible with oxidizing materials and alkalis.
Fire Hazard
Tetrakis(hydroxymethyl)phosphonium sulfate is probably combustible.
Flammability and Explosibility
Non flammable
Advantages
Advantage of the wet white tanned leathers, using THPS offers:
a light color and pastel shades
They can reach shrink temperatures of at least 70 grad C
High softness
Good lightness
Feeling of naturalness
Pleasant to the touch
Beauty that lasts for a long time
Can be burned without the risk of hexavalent chromium formation
Properties of Tetrakis(hydroxymethyl)phosphonium sulfate
| Melting point: | -35°C |
| Boiling point: | 111°C |
| Density | 1.4 g/mL at 25 °C(lit.) |
| vapor pressure | 0Pa at 20℃ |
| Flash point: | 96 °C |
| storage temp. | Sealed in dry,Room Temperature |
| form | liquid |
| color | Colorless to Almost colorless |
| Specific Gravity | 1.42 |
| Water Solubility | >=10 g/100 mL at 18 ºC |
| BRN | 8521357 |
| InChI | InChI=1S/C4H12O4P.H2O4S/c5-1-9(2-6,3-7)4-8;1-5(2,3)4/h5-8H,1-4H2;(H2,1,2,3,4)/q+1;/p-1 |
| CAS DataBase Reference | 55566-30-8(CAS DataBase Reference) |
| EPA Substance Registry System | Tetrakis(hydroxymethyl)phosphonium sulfate (55566-30-8) |
Safety information for Tetrakis(hydroxymethyl)phosphonium sulfate
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06  Health Hazard GHS08 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H317:Sensitisation, Skin H318:Serious eye damage/eye irritation H331:Acute toxicity,inhalation H350:Carcinogenicity H412:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P308+P313:IF exposed or concerned: Get medical advice/attention. |
Computed Descriptors for Tetrakis(hydroxymethyl)phosphonium sulfate
| InChIKey | HFDZMBPIARIWLN-UHFFFAOYSA-M |
| SMILES | [P+](CO)(CO)(CO)CO.S([O-])(=O)(=O)O |
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